1977 gmc motorhomes

1977 gmc motorhomes DEFAULT

1977 GMC motorhome

GMC motorhome was used for hauling around race car around the Midwest

Last summer, I visited the national recreation vehicle museum in Elkhart, Indiana, where the director and I got into a conversation about the popularity of vintage RVs and their restoration. He noted that perhaps 60 percent of those doing such restorations are women, and that the GMC front-drive motorhome is particularly popular.

Our Pick of the Day is a 1977 GMC front-wheel-drive motorhome offered by a classic car dealership in Kentwood, Michigan, near Grand Rapids.

Unit appears ready to roll

From the description and photographs, this unit may not need any restoration. It appears ready to go.

The seller’s advertisement on ClassicCars.com notes that GM produced just fewer than 13,000 of these units between 1973 and 1978. They were available in 23- and 26-foot versions and that “empty shells were supplied to other RV manufacturers for upfitting and custom purposes ranging from mail delivery, mobile training facilities and machine haulers.”

The seller notes that more than 7,000 are listed in an international registry and that as many as 9,000 could still be in running condition.

“This particular example has had an interesting life as hauler of race-car trailers and (the race car’s) owner,” the seller notes. “It was primarily used to attend racing events around the Midwest… and remains in largely original condition.”

The team presumably raced Mercedes, thus the Wisconsin Gullwings emblems on the big RV.

“The vehicle is on consignment and the current owner has had the vehicle about 13 years and has used it sparingly for recreational purposes.”

The odometer shows 11,545 miles.

 

 

 

 

 

It has been stored inside during that time and shows no rust on the underside,” the seller notes. “The paint and decals are fading but the interior is in nice original condition.

“All the maintenance is kept up to date with a brake overhaul just before they brought it in.”

Photographs with the ad show the unit not only has the usual array of RV bedding and such, but also a bathroom complete with a small bathtub.

Unless you really dislike the patterned mauve-colored upholstery, the unit looks ready to roll.

The asking price is $39,900.

To view this listing on ClassicCars.com, see Pick of the Day.

Sours: https://journal.classiccars.com/2017/01/09/pick-day-1977-gmc-motorhome/

GMC Motorhome

GMC Motorhome Clay Model

GMC Motorhome early 1/8 scale clay model

Industry rumors had been circulating for some time that GM was going to be building a motor home. On February 7, 1972 it was made official. About this time the new vehicle was known as the TVS-4, Travel Vehicle Streamlined. The Motor Home design continued to evolve in the two main areas of styling and chassis. The Design Center was continuing with both the external and interior designs. There were twelve designers working with sketches and 1/8 scale (A-scale) clay models. Three or four of these 1/8 scale clay models were made, each with unique design characteristics, each refining their shapes closer to the final form. Once these models were completed, evaluated and approved, full sized drawings were made using 1/4 inch tape to outline the front, rear and side design. These drawings would guide the designers in the next stage: a full size clay model.

The clay full scale 26-foot (7.9 m) motor home was likely the largest clay model GM ever made. Once the shape was completed, the clay surface was “polished” with a sponge and cold water and finished with a silver-blue film of Di-Noc, replicating the painted surface of a vehicle. Upon completion of the full scale clay, plaster cast segments were made of it. Dimensional drawings were made of this final design for tooling and early fiberglass prototype parts for the first prototype bodies. The evolution from the earliest designs with pronounced fender flares, wrap around rear windows and tail lights and other eye-pleasing shapes, drifted toward a still pleasing, but more "manufacturable at reasonable cost" design in the end.

The motorhome had a front-wheel-drive transaxle used in the Oldsmobile Toronado and Cadillac Eldorado with an Oldsmobile 455 cu in (7.5 l) V8 from the Toronado, but the later models made use of the 403 cu in (6.6 l) V8. Both used the GM-designated Turbohydramatic 425 automatic transmission, with a wide chain drive to connect the output of the longitudinally oriented engine to the transmission. The final drive was connected directly to the transmission, and power was fed to the front wheels using half-shafts that ran under the front portion of the engine. The engine was fueled with regular gasoline stored in two 25-US-gallon (95 l) tanks.

GMC Motorhome Chassis

GMC Motorhome chassis

The GMC was equipped with front disc brakes and drums on all four rear wheels. A popular owner modification puts disc brakes on a pair, or sometimes all four rear wheels as well. The front-drive configuration eliminated the driveshaft and rear differential and solid axle found on most front-engined motorhomes. As a result, the floor could be designed only about 14 inches (36 cm) above the roadway. The low floor was too low for a rear cross axle, and GM designed the rear suspension as a tandem pair of wheels, mounted on bogies which rode on pins attached to the sides of the low-profile frame. With the exception of the wheel wells, the rear suspension does not intrude into the living space. The rear bogies are suspended using a double-ended convoluted air bag that is pressurized by an automatic leveling system to maintain the designed ride height. The leveling system can also be manually controlled to level the coach at a campsite. The overall chassis design, from the use of an existing GM E platform powertrain and a modified rear suspension has been considered an early ancestor of the crossover.

The motorhomes were built in either 23-foot (7.0 m) or 26-foot (7.9 m) length, with about 90% of the total production being the latter. The wheelbase from the front wheels to the centerline of the rear tandem pairs is 140 inches (360 cm) for the 23-foot (7.0 m) coach and 160 inches (410 cm) for the 26-foot (7.9 m) coach. All GMC motorhomes are 96 inches (240 cm) wide and about 9 feet (2.7 m) tall including the usually-installed roof air conditioner. Interior head room is 76 inches (190 cm).

Gross vehicle weight rating for the 23-foot (7.0 m) coach was 10,500 pounds (4,800 kg) and 12,500 pounds (5,700 kg) for the 26-foot (7.9 m) coach. Most GMCs with factory interiors have a 30 US gallons (110 l) freshwater tank and a 30 US gallons (110 l) holding tank.

GMC motorhome body-drop

GMC Motorhome production body-drop

Body construction consisted of a rigid frame made of welded aluminum extrusions. The body frame was mounted on the chassis steel ladder frame using body isolators. The floor was marine plywood, except where it sloped up at the extremities, where they were plate aluminum. The body panels are fiber reinforced plastic (fiberglass) below the waistline frame extrusion and at the ends. The upper side body and roof panels between the ends are sheet aluminum. GMCs are notable for their large expanse of windows, which redefined the RV industry at the time. By avoiding materials that can rot in the body skin and frame of the motorhome, the GMCs retain a reputation as being the most restorable and rebuildable of vintage motorhomes. Many formerly abandoned GMCs have been successfully brought back to life because of the durable design.

They often had luxury features common on upper models of GM brands, such as cruise control, air conditioning, AM/FM/8-track sound systems, an aluminum/fiberglass body, as well as air suspension. The aerodynamic styling, with the wrap around windshield and expansive glass area, gave the vehicle a futuristic appearance.

Rear lower compartments provide space for generators and propane tanks. GMCs were optionally supplied with generators from Onan in 4,000 watts and 6,000 watts, many of which are still in service.

GMC motorhomes in good condition and in proper tune are as efficient as similarly powered modern motorhomes, despite the use of computer-controlled engines on the latter, and typically see 9 to 11 miles per US gallon (21 to 26 L/100 km; 11 to 13 mpg-imp) of regular unleaded fuel. GMC Motorhomes tested via a wind tunnel were reported to have a drag coefficient of 0.31, which is typical of modern sedans (although offset by the large frontal area).

Sours: https://golbymotorcorp.com/index.php/home/history-of-the-gmc-motorhome
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1977 GMC Motorhome 23

1977 GMC Motorhome 23

$20,995

Folsom, California

Category Class A

Length 23

Posted 3 Weeks Ago

The GMC is not registered to drive, it is NO OP. It has a salvage title. All the seats, appliances, plumbing,...etc. are functional and are usable as is. This RV has about $14,000 in documented repairs and Maintenance (I have the stack of papers and I added the costs up). This was done by mostly 2 places, the famous GMC shop in Fremont, CA (Applied GMC)...any serious GMC RV person would know this place. And another GMC RV repair facility. Things like suspension, brakes, radiator, hoses, bags,...etc. were replaced and many other things were done to it. It also had an Oil and filter change recently. Stock #209757 Runs great, just was serviced with new battery, many upgrades done. This is the classic GMC 23' Motorhome with an awesome Oldsmobile V8 engine. Only a few of these were manufactured in the 1977 time frame. A self-supporting RV, the first of it's kind, the GMC Motorhome is waiting for a new owner to enjoy its uniqueness and great features. Complete with bathroom shower, toilet and sink, kitchen, oven and a fridge. The coach also has an on-board generator and propane tank system. Powered by a GMC V8 engine, this vehicle has plenty of power to get anywhere. Classic vehicle buffs can turn this Motorhome into a one-of-a-kind on the road. Come to Folsom, CA and take a look.

1977 GMC  motorhome Kingsley 26'

1977 GMC motorhome Kingsley 26'

$17,000

Plymouth, Michigan

Category -

Length 26

Posted Over 1 Month

Nearly original, unrestored, but expertly maintained by Cinnabar engineering in michigan. Many upgraded parts including tires, alternator, exhaust, airbags, battery isolator, power converter, belts, hoses, tune up , carb rebuild , furnace, water heater , refrigerator , fresh water tank, headliner, blinds, hitch (for bike rack), etc. starts and runs great. Previous owner states that the engine and trans were rebuilt at the mid 90,000 mile mark. Lots of receipts and manuals. It does not have leveling jacks, but has leveling airbags

1977 GMC 26' Motorhome

1977 GMC 26' Motorhome

$11,250

Fenton, Michigan

Category -

Length -

Posted Over 1 Month

This 1977 GMC 26’ Motorhome is an American Classic. Stars and Stripes Assault edition. Made famous by Stripes, the 1981 Bill Murray comedy. Own a piece of GMC history. These GMC Motorhomes were built by General Motors and they’re the ultimate recreational vehicle. A lower center of gravity. Front wheel drive and panoramic views from the extra-large windows. For more pictures visit us at http://www.psi42.com/1977-gmc-26rsquo-motorhome-stars-and-stripes-assault-edition.html Nothing can stop you in this Motorhome. It needs a little work to bring it up to full operating condition, but most major components are in great shape. It’s well equipped and about 95% original with the following upgrades and repairs: Heavy Duty Trailering package. Newer tires and air bags. Wipers and windshield washer pump. New microwave. New wheel bearings. Fresh oil, change. New fuel lines and power steering lines. New headlamps. All work was performed by the professionals at Cinnabar Engineering in Sandusky Mi. Strong running 403 cu V8 Oldsmobile Toronado motor with 127,000 miles and a ton of life left. Asking $11,250. VIN# TZE167V102283. Call or text us at 810-853-7222

1977 GMC Motorhome

1977 GMC Motorhome

$13,500

Savannah, Georgia

Category -

Length -

Posted Over 1 Month

Check out this Motorhome - it is worth buying! Complete financing shipping facilities and warranty is available.

1977 GMC Motorhome

1977 GMC Motorhome

$25,000

London, Kentucky

Category -

Length -

Posted Over 1 Month

1977 Gmc Motorhome , 1977 GMC Coca Cola Coach Motorhome. Excellent condition. Owned for over 21 years. Numerous updates. Over 17,000 spent in 2001 at Cinnabar Engineering. Can provide receipts/invoices. This is an excellent motorhome. Great for a collector and/or hitting the open road. Asking $25,000. Serious calls only between 8 a.m.-8p.m 606-864-8502 $25,000.00 6068648502

1977 GMC motorhome with  generator, aluminium wheels and large cloth  awning

1977 GMC motorhome with generator, aluminium wheels and large cloth awning

$4,200

El Paso, Texas

Category -

Length 26

Posted Over 1 Month

Good looking 26 foot GMC mtorhome, You know the hype so I'll get to the facts: It has new starter and master cylinder. Needs engine rebuild or another Toranado 455 engine. all the parts are there. Now jJust the body, a/c's, generator,and windows are worth $4000! But I don't want to part it out and I can't afford the rebuild. Maybe you can. Tranny is good. 26 feet long weighs about 11,500. Call for more info

1977 GMC 26' Royale Motorhome

1977 GMC 26' Royale Motorhome

$24,995

Denver, Colorado

Category -

Length -

Posted Over 1 Month

This is the most honest and original GMC Motor Home that you will find on the market!! drives very well, all parts still in great shape, few minor paint scrapes along the wheels, interior in perfect condition!Rust free undercarriage Twin beds & bunk Rear Bath model 3 burner stovetopAll original interior One roof air conditioners Zip Dee awning Polished Alcoa aluminum wheels Original yellow Imron paint Macerator

1977 GMC 26'

1977 GMC 26'

$49,500

Menifee, California

Category Class A

Length 26

Posted Over 1 Month

1977 GMC 26ft Palm Beach Motorhome with 1974 Pinto Runabout and trailer both restored inside and out. 2 roof air cond. 1- new air conditioner, re-upholstered interior, onan generator, new windshields, new Led marker lights and headlamps and amber lamps, new tires, alcoa rims, new faucet fixtures, new gas stove, 455 Oldsmobile Toranado Engine w/new belts plugs and dist. cap, awning in perfect shape, lots of great care was taken to bring this Classic to where it is today. Please call me will not separate the Motorhome and Pinto; must be sold as a whole unit. Just passed smog with no problem.

1977 GMC 26' MOTOR HOME-BEAUTIFUL+ VERY SPACIOUS

1977 GMC 26' MOTOR HOME-BEAUTIFUL+ VERY SPACIOUS

$18,500

Tampa, Florida

This is a beautiful GMC 26' Motor Home for sale. Please let me tell you everything I know about it.I bought it lastweek and my rental storage area will only accommodate a 23' motorhome- not a 26'. So I decided to sell without ever driving it. The extra 3' in length storage would cost me 96.00 more each month.1200.00 more per year. The previous ownership thing is a real big biggie. Would you rather buy an vehicle that has had a retired senior citizen owning it or buy something with 7 or 8 previous owner beating it half to death. The original owner bought it brand new with 106 miles on it. He kept ownership of it till 01/03/2015 when he sold it to another man due to health issues forcedhim to do so. The 2nd owner owned it 4 months (and 685 miles of use) before selling it to me 05/14/2015. The first owner owned it 98% of the time. So basically this is a one owner motor home.. I had it driven to me from Roanoke, Virginia to Tampa, Fla. without any problems. The "home" runs and drives beautifully.The first owner did all needed servicing to it and had many upgrades done to it over the years. I have sworn statements from that owner that the mileage and odometer showing is correct and proven.There have neverbeen any issues with the odometer and proves the home has had little use in it's lifetime. Most homes of this age will show a rebuilt motor at 100,000+ miles of use. That's fine but the rest of that home has those same 100.000+ miles use on it. That should be a real consideration factor for it. I will list all the equipment and stated upgrades told to me following this information. I am not sure exactly what the gallon water capacity is. I guessed at roughly 51- 60 gallons. That's what most of these size homes have. * 403 Engine- Oldsmobile (I think) * Automatic Transmission * All power equipment offered at that time* Awning is in excellent condition and working* Wood Grain Laminate Flooring* Interior is in very good condition* No roof leaks ever- according to the previous owner* 2) Air Conditioning units with heat strips that work perfectly* Has dash a/c and it blow cold (like the 2 roof a/c's) * Furnace* Water Heater* Large Onan 6000 generator that has been completely serviced* Fresh Water Tank- I do not know the exact capacity of all tanks* Windshield in perfect condition* Mini Blinds throughout and have been replaced* Inverter* LED Running Lights*Ceiling Mounted Flip Down Television w/ roof antenna for good reception*DVD Player + CB unit (not tested so not sure of its workability*4 Brand new Tires (with maybe 700 miles on them from Virginia to Tampa).* LargeTop Storage bin on top of motor home* Two brand new mufflers* This is a complete home away from home* This home was never in an accident.This is according to the previous owner. I'm assuming that statement is correct.* The home states sleeping 4 people- I do believe it can sleep 6 comfortably I've included over 24 photos to describe everything and you to visually see what it looks like. Please look overall photos and write me with any questions. If I were keeping it (forever) the only thing I'd probably do to it to make it lookbrand new is a new paint job. The paint is fine but a little faded due to it's age. But it does not really need the repaint.A new painting would make it look brand new like it was in 1977. I require a deposit of 2000.00 from the buyer and the balance within 7 days with secured funds. Do not bid unless you have the funds to complete the transaction. Just a note- Due to the motorhomes age- your bank or lendinginstitution will not finance. There is NO WARRANTY and is being sold AS IS. The photos are allof the home and it's condition. There are no stock pictures used.. I do have a clean clear title. A note of interest: There is a similar home (also for sale on ebay)- that I do not think it is as nice that they're asking 49,975.00.There is still another "RAT" of a stripped out motor home that they want 5,000.00. It's a real ROACH MOTEL . ANOTHER NOTE TO CONSIDER: I'm having conversation with a young married couple attending FSU. This young couple is considering thismotorhome as a residence for the two of them to live in. They're paying 700.00 a month rent for a small apartment that has about the same square footage as this motorhome. This is like a small home to them. All they need to do is get ithooked up to electric and plumbing and they're living great. In 2 years they should graduate and at 700.00 a month saved- they would own the motorhome free and clear and could sell it for a much higher dollar than they paid. This is just undertheir consideration but I wanted to mention it as an option other than just a transportation vehicle. Thank you very much for your interest. .

1977 GMC Classic Royale

1977 GMC Classic Royale

$31,870

Milwaukie, Oregon

Category -

Length 22

Posted Over 1 Month

2009 COACHCRAFT 19TW, This Coachcraft Van is so COOL! Your daily driver and a small Motorhome all in one. It is super clean and compact, stand up height inside with microwave/sink in the galley, great big sleeping area and more. It will be perfect for weekend getaways

1977 GMC Eleganza Ii

1977 GMC Eleganza Ii

$19,900

Carlisle, Pennsylvania

Category -

Length -

Posted Over 1 Month

1977 Gmc Eleganza Ii , 1977 GMC 26 Eleganza II Motorhome. Oldsmobile 455 cid, QuadraJet carb, front wheel drive, air ride suspension. Side bath, kitchen, a/v entertainment system, sleeps 5. 6,000-watt Onan generator. Repainted 2007. Last inspected in 11/2013. Good running and driving condition. 105,000+ miles. Asking $19,900. Located in Carlisle, PA. $19,900.00 7177376068

1951 GMC Bus

1951 GMC Bus

$30,000

Seymour, Tennessee

Category -

Length 35

Posted Over 1 Month

1951 Gmc Bus , This rare, one of a kind 1951 GM Coach bus motorhome was originally a US Army transport bus. It was sold out of the service in 1971 and a private citizen bought the bus then converted it to the great motorhome it is today. The last paint job was in the early 90's, so it is showing some wear, but it has been mostly kept under a carport or garage during it's lifetime. I have owned it for approx. 12 years, and have updated the piping to the latest RV type (pex), new commode, new furnace, new ref. , it is modern day ready, with old school styling! Powered by a 1977 Ford 391 cu. in. dump truck engine, paired with a 6 speed Allison transmission, it will cruise down the interstate at 65-70 mph easily. Includes a generator, onboard charging system (from the generator), roof a/c, rear view camera, many extras! clear title. Serious inquiries only. $30,000.00 8656605290

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Sours: https://www.smartrvguide.com/rvs-for-sale/1977-gmc-motorhome
1977 GMC 26' KINGSLEY VINTAGE MOTORHOME RV

While I can appreciate a good vintage motorhome, it is our own Chad Reynolds who is a complete and utter freak for these things. It is probably best that I was the one who found this on eBay because Chad would have probably had some sort of episode when he laid eyes on what has to be the cleanest unrestored 1977 GMC motorhome left in the world. Owned by a guy who had a big car collection and was apparently part of a Mercedes Gullwing club, he used this to haul his race car around and attend events. As many of you know, these rigs were front wheel drive and used 455ci Olds engines along with the bombproof TH425 transmission to get the power to the ground. The front wheel drive had all kinds of perceived advantages in terms of the ride height of the thing, the suspensions system, and packaging.

Over a five year period GM built nearly 13,000 of these things and some people estimate as many as 8,000 may still actually be on the road. It speaks to the quality of the drivetrain and the overall construction of the thing. These were baller rides for their day and definitely a status symbol while rolling into a late 1970s or early 1980s campground. Today people have massive bus based motor coaches that make these GMCs look kind go quaint but there is such a strong movement for vintage motorhomes and trailers across the country they they are becoming more and more in-demand. If you want one of these and want to experience what it was like to live in the lap of motorized luxury in the 1970s EXACTLY as it would have been when new, here’s your chance.

From the avocado colored bathroom to the pristine undercarriage, engine you could eat off of, and funky patterned furniture, this baby is perfection on six wheels.

Now…where did Chad go?

CLICK TO SEE THE AD FOR THIS 1977 GMC MOTORHOME – NICEST ONE LEFT


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Sours: https://bangshift.com/bangshiftxl/1977-gmc-motorhome/

Motorhomes 1977 gmc

GMC motorhome

American recreational vehicle

Motor vehicle

The GMC Motorhome is a recreational vehicle that was manufactured by the GMC Truck & Coach Division of General Motors for model years 1973–1978 in Pontiac, Michigan, USA — as the only complete motorhome built by a major auto/truck manufacturer. Manufactured in 23 and 26 ft (7.0 and 7.9 m) lengths, the design was noted for its front-wheel drive and its low profile, fully integrated body.

In contrast to most motorhomes which were manufactured on drivetrain equipped frames supplied by a chassis manufacturer; GMC designed, engineered and built the entire vehicle, and in most cases the interiors, completely in-house. Empty shells were also supplied to other RV manufacturers for interior outfitting and to specialty manufacturers for custom outfitting, ranging from mail delivery and mobile training facilities to people movers and ambulances.

Design and specifications[edit]

GMC Motorhome early 1/8 scale clay model

Industry rumors had been circulating for some time that GM was going to build a motorhome. On February 7, 1972, it was made official. About this time the new vehicle was known as the TVS-4, Travel Vehicle Streamlined. The motorhome design continued to evolve in the two main areas of styling and chassis. The Design Center was continuing with both the external and interior designs. There were twelve designers working with sketches and 1/8 scale (A-scale) clay models. Three or four of these 1/8 scale clay models were made, each with unique design characteristics, each refining their shapes closer to the final form. Once these models were completed, evaluated and approved, full sized drawings were made using 1/4 inch tape to outline the front, rear and side design. These drawings would guide the designers in the next stage: a full size clay model.

The clay full scale 26-foot (7.9 m) motorhome was created. Once the shape was completed, the clay surface was “polished” with a sponge and cold water and finished with a silver-blue film of DI-NOC, replicating the painted surface of a vehicle. Upon completion of the full scale clay, plaster cast segments were made of it. Dimensional drawings were made of this final design for tooling and early fiberglass prototype parts for the first prototype bodies.

The motorhome had a front-wheel-drive transaxle, which GM called Unified Powerplant Package, originally used in the Oldsmobile Toronado and Cadillac Eldorado with an Oldsmobile 455 cu in (7.5 l) V8 from the Toronado, but the later models made use of the 403 cu in (6.6 l) V8. Cadillac employed the 500 cu in (8.2 l) engine. (At the time, the Buick Riviera, which shared most of the same components, and used the same E-body platform, as the Toronado and Eldorado until its 1977 downsizing, was still using the conventional rear-wheel-drive layout.) Both used the GM-designated Turbo-Hydramatic 425 automatic transmission, with a wide roller chain drive to connect the output of the longitudinally oriented engine to the transmission. The final drive was connected directly to the transmission, and power was fed to the front wheels using half-shafts that ran under the front portion of the engine. The engine was fueled with regular gasoline stored in two 25-US-gallon (95 l) tanks.

The GMC was equipped with front disc brakes and drums on all four rear wheels. The front-drive configuration eliminated the driveshaft and rear differential and solid axle found on most front-engined motorhomes. As a result, the floor could be built with about 14 inches (36 cm) clearance above the roadway. The floor was too low for a rear cross axle, and GM designed the rear suspension as a tandem pair of wheels, mounted on bogies which rode on pins attached to the sides of the low-profile frame. With the exception of the wheel wells, the rear suspension does not intrude into the living space. The rear bogies are suspended using a double-ended reversible sleeve air bag that is pressurized by an automatic leveling system to maintain the designed ride height. The leveling system can also be manually controlled to level the coach at a campsite. The overall chassis design, from the use of an existing GM E platform powertrain and a modified rear suspension has been considered an early ancestor of the crossover.

The motorhomes were built in either 23-foot (7.0 m) or 26-foot (7.9 m) length, with about 90% of the total production being the latter. The wheelbase from the front wheels to the centerline of the rear tandem pairs is 140 inches (360 cm) for the 23-foot (7.0 m) coach and 160 inches (410 cm) for the 26-foot (7.9 m) coach. All GMC Motorhomes are 96 inches (240 cm) wide and about 9 feet (2.7 m) tall including the usually-installed roof air conditioner. Interior head room is 76 inches (190 cm).

Gross vehicle weight rating for the 23-foot (7.0 m) coach was 10,500 pounds (4,800 kg) and 12,500 pounds (5,700 kg) for the 26-foot (7.9 m) coach. Most GMCs with factory interiors have a 30 US gallons (110 l) freshwater tank and a 30 US gallons (110 l) holding tank.

GMC Motorhome production body-drop

Body construction consisted of a rigid frame made of welded aluminum extrusions. The body frame was mounted on the chassis steel ladder frame using body isolators. The floor was marine plywood, except where it sloped up at the extremities, where they were plate aluminum. The body panels are fiber reinforced plastic (fiberglass) below the waistline frame extrusion and at the ends. The upper side body and roof panels between the ends are sheet aluminum. GMCs are notable for their large expanse of windows, which redefined the RV industry at the time. They often had luxury features common on upper models of GM brands, such as cruise control, air conditioning, AM/FM/8-track sound systems, an aluminum/fiberglass body, as well as air suspension.

Rear lower compartments provide space for generators and propane tanks. GMCs were optionally supplied with generators from Onan in 4,000 watts and 6,000 watts, many of which are still in service. There were no driver's or passenger's doors at the front of the vehicle. A single door amidships on the right-hand side provided access to the main passenger compartment. At the back of the vehicle, the entire rear body panel could be removed by loosening the bolts around its edges. This allowed beds, appliances and other bulky items to be installed or removed.

Production[edit]

A total of 12,921 GMC Motorhomes were produced from model years 1973 to 1978. The interior of the motor home was constructed at the Gemini Corporation plant in Mt. Clemens, Michigan. Peter R. Fink, owner of Travco motor homes, was the CEO of Gemini.[1] The Gemini operation featured a progressive team concept with teams of workers constructing rooms of the motor homes in full, rather than performing repetitive tasks on an assembly line. Beginning operation in 1972, the plant featured state-of-the-art equipment including one of the first programmable routers. Gemini closed a few years after General Motors discontinued production of its motor homes.[2] Over 7,000 are currently listed in an international registry. Estimates suggest that at least 8,000 to 9,000 of the original production are still in running condition.

A press release datelined Pontiac, November 11, 1977, read as follows: “GMC Truck & Coach Division of General Motors plans to discontinue producing luxury MotorHomes and similar TransMode multi-purpose vehicles and convert those plant facilities to expand truck operations, a GM vice president said today. Robert W. Truxell, general manager of GMC Truck & Coach said, “As a result of this action, GMC will be able to utilize production facilities more effectively for servicing growing truck demands.”[3] Another factor is that the driveline for the new for 1979 E platform which was in the process of being downsized (and on which Buick would debut its first-ever front-wheel-drive Riviera) was lighter duty and incompatible with the GVW of the GMC motorhome where the existing Oldsmobile-sourced driveline was being phased out of production (the 403 and THM425 transaxle were phased out and replaced with the Oldsmobile 350 and THM325 when the downsized E platform was under development.)

Influences[edit]

Prior to the introduction of the GMC Motor home, a handful of other manufacturers made use of a similar front-wheel drive configuration and inspired the GMC configuration.[4] These included the Cortez Motor Home from the Clark Equipment Corporation which initially offered a four-speed manual transmission with front-wheel drive, available from 1963 to 1970 until the division was sold to Kent Industries.[5] From 1972 to 1977, a redesigned Cortez-SD was manufactured, initially by Kent and later a group of investors, using the same Oldsmobile 455 and three-speed automatic transmission that the GMC motorhome adopted in 1973.

Another parallel design was the Revcon motor home, which, starting in 1971, was an all-aluminum body front-wheel drive coach, initially with the same Toronado drive train as the later GMC.[6] Beginning in 1978, the Revcon took on a more aerodynamic design similar to the just-canceled GMC Motor home, which included a slant nose and dual rear axle, while adopting a Chevrolet454 engine and Turbo-Hydramatic 475 transmission. These were in production through 1990, with one coach built in 1991 using remaining components before the factory closed.[7]

References[edit]

External links[edit]

Sours: https://en.wikipedia.org/wiki/GMC_motorhome
1977 GMC PALM BEACH CUSTOM by DRIVEN.CO

1973-1978 GMC Motorhome: General Motors’ Grand RV Experiment

GM’s excursion into the recreational vehicle market in the 1970's may not have been a money maker for the automaker, but it produced some impressive and memorable machines. Here’s a brief look at the GMC motorhome experiment.

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In 1970, General Motors planners saw opportunity in the growing recreational vehicle market, and began to lay plans for a factory-built motorhome that was formally introduced to the public in January of 1973. Seldom have the full engineering and manufacturing resources of a global automaker (here, led by GM’s GMC Truck and Bus division) been applied to a consumer motorhome, and the resulting vehicle made an impressive statement, even if it wasn’t a money-making commercial success for General Motors. 

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The GMC motorhome was offered in both 23-ft. and 26-ft. models, with five or more available floor plans for each version, creating a variety of useful seating and sleeping possibilities. Exterior body panels were fiberglass and aluminum, supported by an aircraft-like framework of extruded aluminum. The strong, light construction produced a 10,500-lb. gross vehicle weight rating for the 23-footer and a 12,500-lb. rating for the 26-footer. Michael Lathers, chief of the GM Design Center, is credited for the exterior design. 

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A conventional steel ladder frame formed the motorhome’s chassis, supporting a front-drive Olds Toronado powertrain module up front and and tandem wheels with independent air suspension at the rear.

The 23-ft. model rode on a 140-inch wheelbase, while the 26-ft. version employed a 160-in. wheelbase.

One 30-gallon fresh water tank and one 30-gallon waste tank were provided, along with two 25-gallon fuel tanks. 

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As noted above, the front-drive powertrain module, including the 455 CID V8, Turbo Hydramatic 425 automatic transmission, and torsion-bar front suspension, was taken whole from the Oldsmobile Toronado, producing a tidy and efficient package. Owners reported reported decent road performance and fuel consumption in the 9 to 11 mpg range. When the 455 CID Olds V8 was downsized to 403 CID for 1977, the motorhome was forced to follow along, so ’77 and ’78 models are equipped with the smaller V8. The Toronado drivetrain also allowed a low, sleek body and chassis height. 

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A wide variety of exterior and interior decorating themes were offered, with names including Palm Beach, Eleganza, and Canyonlands. There’s no missing the ’70s flavor of this exercise in avocado called Sequoia, shown here viewing from the front rearward. The bold themes were in part driven by GM President Ed Cole’s call forbright, cheerful colors for the project. 

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This more subdued interior theme for 1977 was called the Kingsley, shown here looking forward toward the driver’s seat. GM product planners envisioned mobile office and showroom applications for the motorhome platform, but the company never got around to offering specific models for commercial use.

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After six model years in production, GM’s foray into the RV business was canceled on November 11, 1977, at the end of the 1978 model year.  When General Motors ceased building the large Toronado,they also ceased building the large-block Toronado drivetrain, so there would no longer be a drivetrain for the GMC Motorhome.The manufacturing facility at GMC’s Pontiac, Michigan plant was returned to truck and bus assembly.

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Nearly 13,000 motorhomes were produced—exactly 12,921, the experts say. But more impressive is the fact that 9,000 to 10,000 of the vehicles are reportedly still in use, an amazing survival rate, and the elegant machines continue to command strong prices in the used motorhome market to this day.When the Motorhomes were in production, General Motors marketing division helped sponsor the GMC Owners Annual Conventions.  These conventions had well-known entertainers and technical seminars for the owners.  These conventions also inspired the owners to form the GMC Motorhomes International owners club.  Today the club is very active with chapters all across the United States.Click here to learn about the club:  http://www.gmcmi.com/

Sours: https://www.sirumvintagegmc.com/the-story-of-the-classic-gmc-motorhome

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GMC Motorhome Basic Information

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>> GMC Motorhome Model Year Availability & Floor Plans Produced

Click here to view pdf. (Source: GMCMI)


>> GMC Motorhome Floor Plan Diagrams

23′ GMC Motorhome Floor Plan Diagrams (Source: GMCMI)

26′ GMC Motorhome Floor Plan Diagrams (Source: GMCMI)


>> GMC Motorhome Vehicle Identification Number Decoding

VIN Decoding Example TZE167V102359

T = Manufactured by General Motors

Z = 3 Axle Motorhome

E = Gasoline Engine

1 = Interior Code
“1” – GM Interior from 1975 to 1978
“0” – GM Interior from 1973 to 1974
“2” – Twin Bed Interior from 1976 to 1977
“3” – Transmode(sold without interior or windows)

6 = Model
“6” – Model 260(26 feet long)
“3” – Model 230(23 feet long)

7 = Model Year(1977)

V = Manufacturing Plant Code
“V” – Pontiac, Michigan

1 = First Digit of Production Series Number – All production started with “1”

0 = Since total production was less than 13,000, all GMC Motorhomes had a zero in this position

2359 = Production sequence number


>> Service Parts Identification Label

GMCMH Service Parts Identification Label
Label in glovebox of GMC upfitted interiors identifies the interior finish model as:
641
Kingsley
681
Glenbrook
683
Edgemont
685
Coca Cola
690
Sequoia
692
Painted Desert
693
Glacier
695
Canyon Lands
696
Eleganza I
697
Eleganza II
698
Palm Beach

>> GMC Motorhome Production

Production of Motorhome Models
by Model Year
Model
Year
GMC Interiors
Transmodes

Total
23 foot
26 foot
23 foot
26 foot
1973
461
1,598
2,059
1974
168
1,496
1,664
1975
1,196
36
425
1,657
1976
2,413
549
298
3,260
1977
1,694
253
455
2,402
1978
689
178
1,012
1,879
Total
629
9,086
1,016
2,190
12,921
Source – GMCMI Newsletter, Fall 1982.
Submitted by Zachary Zehnacker.

Click here to view pdf.


>> GMC Motorhome Advertised Gross Vehicle Weight

GMC Motorhome
Advertised Gross Vehicle Weight
by Year
23′ GMC Motorhome
Year(s)
FrontRear
Total
1973-77
 4,000 7,000
10,500
1978
 4,200 7,000
11,200
26′ GMC Motorhome
Year(s)
FrontRear
Total
1973 Early*
4,0007,000
10,500
Late 1973-1974
4,2007,000
11,200
1975-1977
4,2007,500
11,700
1978
4,5008,000
12,500
*1973 Early = up to ~V1002400
Source: Bill Bryant

Click here to view pdf.


>> GMC Motorhome Scale Weights

Click here to view pdf. (Source: Unknown)


>> GMC Motorhome Dimensions

GMC Motorhome Dimensions
Track
Front
75.28 in
Rear
85.12 in
Wheelbase
Model 230
140 in
Model 260
160 in
Length (Inc. Opt. Spare Tire)
Model 230
23 ft – 9 in
Model 260
26 ft – 9 in
Length (Inc. Opt. Trunk)
Model 230
24 ft – 8 in
Model 260
27 ft – 8 in
Width
96 in
Height
8 ft – 1 in
with air conditioner
9 ft – 2 in
Front Overhang
All Models
42 in
Rear Overhang
Model 230
69 in
Model 260
89 in
Interior Ceiling Height
76 in
Source:1973 GMC Motorhome
Owner’s Manual

Click here to view pdf.


>> GMC Motorhome Capabilities

GMC Motorhome Capabilities
Fuel System
two – 25 gal tanks
 Cooling System
21 quarts
Engine Oil
5 quarts (6 quarts including filter)
 Transmission
4 quarts –
drain & refill
10 quarts after complete overhaul
 Final Drive (Differential)
4 pints
Power Steering Pump
1 pint
 Power Steering System
1 1/2 quarts
LP Gas Tank
44.5 pounds (standard)
65.0 pounds
(optional)
 Living Area
Water Tank
40 gallons
Holding Tank
40 gallons
Hot Water Tank
6 gallons
Source: 1973 GMC Motorhome
Owner’s Manual

Click here to view pdf.


>> GMC Motorhome Engine

GMC Motorhome Engine
1973 to 1976 Model Years
Displacement
455 cubic inches
Carburetor4 barrel
Compression Ratio
8.5:1
Bore
4.125 in
 Stroke
4.250 in
Firing Order
1-8-4-3-6-5-7-2
Dwell
30 degrees
Timing
8 degress BTDC @ 1100 RPM
Slow Idle Screw
600 RPM in Drive
 Fast Idle Screw
1100 RPM in Park or Neutral
Spark Plugs
AC R45S
Spark Plug Gap
.040 in.
Valve Lash
Hydraulic
Idle Mixture
Do Not Remove Caps
Fuel Requirements
91 Octane or Higher
Source: 1973 GMC Motorhome
Owner’s Manual

Click here to view pdf.


>> GMC Motorhome Exterior Paint Codes

1973-1975 Exterior Paint Codes (Source: Unknown)

1976-1978 Exterior Paint Codes (Source: Unknown)


>> GMC Motorhome Pricing

1977 – 26 ft Price List with Options (Source: Bill Bryant)


>> Other Items of Interest

GMC Motorhome Log (Unknown)

VIN Decoding (Source: What’s in a Number? by Dave Greenberg | GMC Motorhome Marketplace, March 1997)

1975 Warranty Information (Source: Bill Bryant)

X7523-A | 1975 Emission Control Systems Information and Warranty Folder
(with engine certified for 1975) (Source: Bill Bryant)

X7726-A | 1977 Warranty Card (Source/Scan: Emery Stora)

X8024A | 1980 Drivers Directory of GMC Motorhome Service Representatives (Source: Bob & Marlys Drewes)

Motoroamer’s Pre-Flight Check List (Source: Bill Bryant)


Sours: https://www.gmcmi.com/gmcmh-basic-information/


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