Installed a new PCM and it does not start, why?

Tiny
WTHME702
  • MEMBER
  • 1996 CHEVROLET IMPALA
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 155,000 MILES
I installed a new PCM, and it doesn't want to start, it sounds like it's like it wants to start but doesn't.
Friday, August 12th, 2022 AT 12:25 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,389 POSTS
When you installed the PCM was it programmed to the VIN number beforehand? Also, did you transfer the knock module? Here are the instructions on how to install a new PCM in the images below. Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.
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Friday, August 12th, 2022 AT 1:20 PM

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