Just got done swapping 4.8l to 5.3l shaved the heads installed 2000 ls1 corvette cam and ls6 intake and now cant get truck to fire.
I have tested for spark, fuel, injector pulse, and I have an rpm reading from crank sensor, also have taken care of all the vacuum lines for the intake swap. I am running the stock pcm from the 4.8l and i know that will affect how it runs but not cause a no start. Ran out of things to test wondering if anyone has any ideas