Pontiac motor in a GMC - The 1947 - Present Chevrolet & GMC Truck Message Board Network

67-72chevyman · 12-21-2006, 11:52 PM

I was reading on jebbs project thread that there was pontiac motors in GMC trucks, what years did they do that? Does this mean there was streight 8s in the late 40s-early 50s GMC trucks?

Fred T · 12-22-2006, 01:00 AM

I didn't see the article. I assume he's talking Canadian trucks, where they did get Pontiac engines, but not the straight 8 (to my knowledge). In the US GMC used the 227 (39-52), 248 (53-55), 270 (53-63) and 302 (52-62). I have seen 302's in heavy trucks, not pickups.

dwcsr · 12-22-2006, 02:36 AM

Pontiac engines came in all GMC's pickups up to about 1960 in the US. GMC was a division of Pontiac.

Jebb1978 · 12-22-2006, 09:42 AM

Here is some info on the motors.
http://en.wikipedia.org/wiki/Pontiac_V8_engine

" The 336 in³ (5.5 L) engine was only used in GMC trucks. The stroke was 3.875 (98.4 mm) and the bore was 3.56 in. (90.4 mm)."

The motors came in any V8 powered GMC truck from 1955.2 to 1959. GMCs never came with an inline 8 but they did have thier own line of IL6 engines until 1959. In 1960 they all came with Chevy motors. The only exeption to the above is the Canadian versions which came with Chevy IL6s from 1955.2 on. NorthernGMC on this site has a truck that falls in this group. Check it out here http://67-72chevytrucks.com/vboard/s...ht=northerngmc

MARTINSR · 12-22-2006, 11:06 AM

The larger GMC trucks also came with 322 Buicks in them!

Brian

67-72chevyman · 12-22-2006, 04:35 PM

Come to think of it I seen an old ad for a 55 or 56 larger truck I think it was a chevy and it said you could get a 322 or something like that.

12-21-2006, 11:52 PM	#1
67-72chevyman Registered User Join Date: Oct 2005 Location: West Virginia Posts: 136	Pontiac motor in a GMC I was reading on jebbs project thread that there was pontiac motors in GMC trucks, what years did they do that? Does this mean there was streight 8s in the late 40s-early 50s GMC trucks?

12-22-2006, 01:00 AM	#2
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	Re: Pontiac motor in a GMC I didn't see the article. I assume he's talking Canadian trucks, where they did get Pontiac engines, but not the straight 8 (to my knowledge). In the US GMC used the 227 (39-52), 248 (53-55), 270 (53-63) and 302 (52-62). I have seen 302's in heavy trucks, not pickups. __________________ Fred There is no such thing as too much cam...just not enough engine.

12-22-2006, 02:36 AM	#3
dwcsr Hollister Road Co. Join Date: Apr 2005 Location: Houston Posts: 6,131	Re: Pontiac motor in a GMC Pontiac engines came in all GMC's pickups up to about 1960 in the US. GMC was a division of Pontiac.

12-22-2006, 09:42 AM	#4
Jebb1978 Senior Member Join Date: Aug 2005 Location: Mesa,Az Posts: 3,713	Re: Pontiac motor in a GMC Here is some info on the motors. http://en.wikipedia.org/wiki/Pontiac_V8_engine " The 336 in³ (5.5 L) engine was only used in GMC trucks. The stroke was 3.875 (98.4 mm) and the bore was 3.56 in. (90.4 mm)." The motors came in any V8 powered GMC truck from 1955.2 to 1959. GMCs never came with an inline 8 but they did have thier own line of IL6 engines until 1959. In 1960 they all came with Chevy motors. The only exeption to the above is the Canadian versions which came with Chevy IL6s from 1955.2 on. NorthernGMC on this site has a truck that falls in this group. Check it out here http://67-72chevytrucks.com/vboard/s...ht=northerngmc __________________ 1959 GMC project Last edited by Jebb1978; 12-22-2006 at 10:12 AM.

12-22-2006, 11:06 AM	#5
MARTINSR Registered User Join Date: Dec 2000 Location: Boise, Idaho Posts: 6,003	Re: Pontiac motor in a GMC The larger GMC trucks also came with 322 Buicks in them! Brian __________________ 1948 Chevy pickup Chopped, Sectioned, 1953 Corvette 235 powered. Once was even 401 Buick mid engined with the carburetor right between the seats! Bought with paper route money in 1973 when I was 15. "Fan of most anything that moves human beings"

12-22-2006, 04:35 PM	#6
67-72chevyman Registered User Join Date: Oct 2005 Location: West Virginia Posts: 136	Re: Pontiac motor in a GMC Come to think of it I seen an old ad for a 55 or 56 larger truck I think it was a chevy and it said you could get a 322 or something like that.

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