In light duty trucks from 1967 up Chevy & GMC have pretty much been
identical. Light duty being all trucks up to a C-40/C-45.
The 67 to 72 body style the GMC's came with more options as stanard
equpiment. GMC did have a few GMC only things in those years, but not
that much. 73 to 87 Trucks are pretty much trim & grills, plus GMC
stamped on tailgates. 88 up C/K trucks the differances are even less.
GMC's may have different Options Packages compaired a Chevy.
Such as my buddies 71 3/4 ton 4x4. 307 V8, 3+Low (granny gear)
transmission. Power Disk Brakes, 1 ton axles (factory installed),
factory wood floor bed. Most Chevy 3/4 ton 4x4's of that year would have
had front Drum Brakes, and lighter duty axles (3/4 ton), as well as a
metal bed floor.
When you get in to medium duty trucks from the 50's to the 80's they
were more differances between the brands. Although I have seen 50's &
60's Chevy Medium Duties with the GMC 305 V6. That's not a Type-o. They
made a Medium Duty ONLY 305 V6! It's a Gasoline engine. Next to
impossible to find parts for.
I remeber in about 54 or 55 GMC had a v-6 for pickups whereas Chev still
used the stove bolt 6. But in those
days many GM divisions had their own engines and transmissions. look at the
Chev, Buick and Oldsmobile
Devisional engines became 'corperate engines' in the late 70's.
Firebirds could be ordered with a 4.9L Pontiac 301, a Chevy 305, a Olds
350 (1976-1977 Only) or a Olds 403. In the 80's a Buick Regal either
came with a buick 3.8 or a Olds 307.
My 1979 Buick Lesabra 2dr HT, had a pontiac 301 in it.
The engines that survived the FWD transission went to what we call
engine families. Shuch as a 3.3,3.8,4.0 V6 are buick V6's. 2.8,3.1,3.4
V6's are Chevy engines. Olds had a 3.5l V6 and the aroura V8 untill GM
killed that devision. Caddilac while in the 80's starting using olds
engines after their 4100 problems. I junked a 88 Fullsize RWD Caddy that
had a olds 307 in it. Yet after that they went back to caddilac engines.
Devisions like Saturn have their own drivelines. All Truck Devisions use
Corperate Truck Engines. When you get in to medium duty you can get a
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.