gmc 5.7 vs chevy 5.7
10-12-2016, 02:19 PM
#2
Senior Member
True Car Nut
GM engines are used interchangeably across the product line. I remember several years back when some consumer was upset because his brand new Cadillac had the same engine as a Chevrolet. Back when I had my 78 Trans Am it had a 400 cid Pontiac engine in it which was blue, and the 79 had a 403 cid Chevrolet engine in it that was painted orange, but I think they have done away with situations like that. With possible exception of some hang on components the two engines you reference are likely identical.
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Tech II (10-12-2016)
10-13-2016, 06:28 AM
#3
Senior Member
Posts like a Turbo
GM engines are used interchangeably across the product line. I remember several years back when some consumer was upset because his brand new Cadillac had the same engine as a Chevrolet. Back when I had my 78 Trans Am it had a 400 cid Pontiac engine in it which was blue, and the 79 had a 403 cid Chevrolet engine in it that was painted orange, but I think they have done away with situations like that. With possible exception of some hang on components the two engines you reference are likely identical.
10-13-2016, 07:45 AM
#4
Senior Member
True Car Nut
Right you are. As soon as I read your post I recalled it being Olds, not Chevy. It was a dog compared to the Pontiac 400. Mind you, the Pontiac 400 was no great shakes ... rated at 220 HP in the high performance version. The options were a TA6.6 and a 6.6. Fun to drive though, especially with the 4-spd manual transmission.
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