We tried a used PCM in a 2004 Trailblazer 4.2 4x4 today because we couldn't find the cause for multiple codes and fuel gauge pegged at full. Guess what? The codes went away and the fuel gauge works. Darned if it won't crank though.
Has anyone success with a used PCM? Any idea why it won't crank? It cranks and runs with the old PCM but has no throttle response, multiple codes and the fuel gauge reads full (it's only got quarter tank)
We did find the dark blue wire pulled out at the fan clutch connector and repaired that but it didn't change anything. I'm more curious though about a successful used PCM swap though. Thanks to all, Wally
Has anyone success with a used PCM? Any idea why it won't crank? It cranks and runs with the old PCM but has no throttle response, multiple codes and the fuel gauge reads full (it's only got quarter tank)
We did find the dark blue wire pulled out at the fan clutch connector and repaired that but it didn't change anything. I'm more curious though about a successful used PCM swap though. Thanks to all, Wally