i have a 97 silverado and it had a 4.3 in it. 8 Months ago i put in a 2002 5.3 i finally finished the wiring and my engine starts then 2 seconds later it dies. i read that the computer had to be flashed or something like that but that it costs alot. someone also told me that their is a way to bypass the vats system ,if its true than can someone please tell me how to do it
thank you
liljojoe13