PCM replacement

walterb · November 27, 2011

can the PCM be replaced by an owner?

00Silverado4x4 · November 27, 2011

From what I have seen on Youtube, yes you can do the replacement. The problem is the programming. You will still need the PCM to be programmed for your truck in order to run. Dealer (if you want to pay out the nose) or a place like Black Bear to do it would be a couple of choices.

06MonteSS · November 30, 2011

plus you will need to get the crank relearn procedure done on it by your dealer, or someone with a GM Tech2 tool...

Mike@Diablosport · November 30, 2011

there are some places that will sell you a PCM and program it for you prior to shipping, but as Lew mentioned, a crank relearn is likely going to be needed after the replacement.

walterb · December 2, 2011

thank you, does the "crank relearn "need to happen before the vehicle can be started?

btw my truck is a 2004 Hummer H2 6.0 L stock ,

i'm working on an intermittent starting problem. I've changed ignition key.replaced starter relay, .replaced the ignition switch and park neutral switch .Still no power to starter when ignition switch is turn to start. There is power to the "crank start" fuse, with ignition switch is turn to start? any help?