I have just happened to come across an LS1 out of an '02 vette and am wanting to know how much work it would take to put the engine in my 2001 GMC Sierra. Really just wanting to know will my ECM work and all my other parts I have, I am thinking about doing the Trick Flow stage3 cam and a set of there heads on the motor. The motor has about 77,000 miles on it and is in great shape, and on a final note will my harness from my truck work on the engine, thanks to all that post and it might take awile but I will return and post responses to everyone that does post, thanks again and later.

 

if you already have a 4.8 or 5.3 in your truck its a direct swap. your computer will work and the wiring harness will plug right in. just transfer some various parts such as your oil pan, intake and all front accessories and your in business. we did my swap in about 8 hrs pulling the 5.3 and building up the ls1 shortblock. that was with 2 people, some good tools and a few beers in between.

 

That is cool man now that I know I think it will be an easy swap, just waiting till the weather will cooperate and the funds are there to do the complete swap like I want to do, later and thanks alot.

 

Harness plugs are different on the injectors but if you plan on running the truck intake then it won't be a problem. If you want to run the LS1 intake you should be able to swap you truck injectors into it or buy the plugs to run the LS1 injectors. I think the truck injectors flow about the same but not certain on that.

 

truck injectors are 19Lb/Hr for 99, 24lb/hr after that... LS1 injectors are 28lb/hr

 

Run the truck intake! Especially in a truck. Look on this site and LS1tech for threads on how much better the truck intake is than the LS1.

 

https://www.performancetrucks.net/fo...ht=intake+flow

 

That's one of them, thanks.

 

 

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