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Old 07-24-2006, 01:20 AM   #43
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Hello Tin knocker,

The olds and pontiac engine usage was in the early 1900s upwards of 1920
cannot say for how long ,but the GMC info on that is clearly documented.
the v8 in the 56 does sound odd ,but It is original.GMC did not have their own v8 ,hence the big v6 usually a 302 displacement.Another unusual GMC
v6 piece of trivia are the v6 plaid ,yes plaid as in that checkered scotish
look, on the valve covers of some GMC v6 trucks .Frank S may have seen these . I hear a marketing idea someone came up with .I have seen those as well .THe covers look like the chrome ones on your 478 huge v6 ,but were
painted plaid .The 261 GMC inline came in the cabover engine truck 2 ton.
My 1950 coe came with a high pressure oiling 235 ,the GMC being a much
heavier duty engine.

Scott
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Old 07-24-2006, 08:41 AM   #44
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scott

do you know anything about gmc straight eights?

i saw a tow truck once that had one, the owner claimed it was the largest diplacement gas engine ever used in a gm truck.

btw, we used it to help tow a 50 ton crane to the top of rib mountain in wausaw wis, to erect a radio tower! it had no problem towing the crane!

john
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Old 07-24-2006, 09:55 AM   #45
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Quote:
Originally Posted by jcanavera
I'm sure its probably the same on most of the truck line.

Jack
After owning a '98 GMC Sierra that was ran into while parked in front of my house, and getting an '04 Chevy Silverado as a rental while my truck was in the shop I will only buy GMC trucks they drive and handle better. That is why my truck now is an '05 GMC Sierra after test drives on both the Sierra and a Silverado.
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Old 07-24-2006, 10:46 AM   #46
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When I worked for a GMC dealer and was asked what was the difference between a Chev. and GMC we always said nothing. They were the same truck, built on the same assembly line. When they came to the inspection point those that pasted got GMC emblems ,Chev emblems went on all others. Later I worked at a Chev. dealer and ,you guessed it, the story changed.
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Old 07-24-2006, 11:18 AM   #47
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Hi 65glbtrotter--Although GMC and Chevy pickups were different in the past, currently they are the same mechanicly. I would think the driving difference you experienced might have been the result of having a 4.10 rear in the GMC, and a 3.73 rear in the Chevy test drivers. I stick with Chevy, as I travel a lot, and Chevy has more dealerships available around the country for service. Just my 2-cents worth. Enjoy your GMC Sierra, it's a winner.--Frank S
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Old 07-24-2006, 11:24 AM   #48
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Hi--Forgot to add that GMC will again position the truck line to an upscale position, above Chevy. Larger engines, more options, higher trim levels.--Frank S
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Old 07-24-2006, 03:58 PM   #49
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Amc

AMC. Aint my car. Have seen at least 2 1956 GMC pickups w/pontiac engines.Makes sense too cuz pontiacs & GMC were often the same dealership.Poor Old Numbskull Thinks Its A Cadillac.
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Old 07-24-2006, 07:20 PM   #50
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Same factory, same parts, same workers...

Jack said it well... GMC and Chevy trucks, Suburbans, etc come down the same line built by the same people using the same parts bins.. Different grills, logo emblems and manuals are the differences today..

If one handles differently, it is due to different options, suspensions and tires, not any design or "quality" differences between the two.. Even GM commercials always have to excuse any other GM truck from comparisons, since they're identical..

I've been into two GMC dealers asking them to explain price premium (GMC's do sell for higher prices..) and they are unable to answer other than "more upscale.." which I don't understand...

What I do understand is GMC dealer won't honor a Chevy Truck warranty, and vice versa, so if you ever travel away from your home dealer, and have a warranty problem, you're twice as likely to get it fixed in a Chevy than in a GMC, since that is ratio of dealers... I guess some people just like the looks of the blacked out grille... YMMV...

John McG
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Old 07-24-2006, 08:01 PM   #51
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Since you went there first...kind of.

Quote:
Originally Posted by 60pacer
Poor Old Numbskull Thinks Its A Cadillac.
Chevrolet= Completely Hopeless Every Vehicle Relies On Leftover Engine Technology.
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Old 07-24-2006, 09:29 PM   #52
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Quote:
Originally Posted by AZstreamin
how about General Motor Coffin.......one of the big three will be owned by someone else before the end of next year
Now that, I would take a bet on.
Doubtful that it will be "owned". Definite consideration can be given the fact that another car company could become a "major stakeholder" though.
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Old 07-24-2006, 10:03 PM   #53
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Hello john hd ,
Nope haven't seen one ,interesting for sure .The pontiac and buick straight 8
engines are the only ones I have seen .as I am reading the first 100 years of GMC ,it states that in 1938 they used a pontiac 222.7 cid 6 and into 39 an
oldsmobile 229.7 cid 6. It shows that the pontiac plant was building trucks.
Now in 1955 a 287.2 cid pontiac v-8 was an extra cost option ,the 316.6
pontiac v-8 was installed ,same as the 56 pontiac car engine.It appears
this continued until 58 59 only ,then the new v-6 302 came along as the
new engine. Now as to the chevy / GMC difference we all pretty much know
that today there is no difference ,pattersontoo is right about chevy and their
future holdings ,and ownership of the company ,they have been really lucky
with the hummer /GM partnership and the light truck line .who knows though
maybe that camaro ,retro vette looking car might help them ,but I suspect
they will want 40 grand for it.

Scott
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Old 07-25-2006, 06:08 PM   #54
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i love it when i'm wrong!

scott,

i talked to one of my old coworkers he reminded me the tow truck had a V12 not a straight eight as i thought.

did a little research i found this, check it out! 702 C.I.D.!!!!!! basicly two V6's glued together!

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Old 07-25-2006, 07:34 PM   #55
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John--I know I'm telling my age but here goes anyway. In the spring of 1959 I was a 18 year old cocky kid right out of automotive school, Nashville Auto Diesel College, and had hired on at a little country Chev. dealer in Morrow Ohio. They were so lucky to get me as at that age I knew "EVERYTHING"!!!! Anyway being the lowest on the seniority I was selected to got to the GM training center to be trained on the newest GM idea, the Corvair. A whole "nother story". Anyway when at school they had several GMC trucks with these engines in them. I thought they were proto types at the time but found out they were available in production. Am not sure how many but some. They were not exactly gluded together as it was in fact one cylinder block that had the appearance of 2 cast together. They did have 4 cylinderheads 2 intakes ,and if my memory serves me correct 2 distributers.
It was my understanding they had one piece cam and crankshafts. It was but one of the many trial and error items GM as well as Ford and Chrysler had in those days. As I always say,"What makes the good old days the good old days, is a poor memory".---Pieman
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Old 07-25-2006, 08:00 PM   #56
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Quote:
Originally Posted by Frank S
I stick with Chevy, as I travel a lot, and Chevy has more dealerships available around the country for service. Just my 2-cents worth. Enjoy your GMC Sierra, it's a winner.--Frank S
I use to take my company GMC to a Chevy dealer all the time for waranty work. Never had a problem. I took it to several different Chevy dealers infact.
After it was out of warranty only the local Chevy dealer worked on it, the GMC dealer wouldn't take the Fleet card.
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