2002 Chevy Trailblazer Buying a new preprogrammed ECM (PCM)

CHABUNGA

MEMBER
2002 CHEVROLET TRAILBLAZER
6 CYL
4WD
AUTOMATIC
84,000 MILES

Service Engine Soon light on. Scan at Autozone was P0601 which they said means need a new ECM. They will sell me a pre-programmed unit if I give them all my vehicle specs. BUT, others have told me that I need to have the dealer program it. I'm getting conflicting information. Can some one clear this up for me? Thanks in advance

1 Reply

MATHIASO

MECHANIC
1,209 POSTS

P0601 trouble code means that a serial communication failed inside the computer at least 6 times.
Symptoms
Likely, no symptoms will be discernible to the driver, other than the illuminated Check Engine Light. Typically the engine runs fine, gauges work, etc
With a P0601 OBD-II trouble code, the most common fix is to replace and reprogram the PCM. In a few cases the dealer may be able to reflash the PCM and get it working. But more than likely the PCM will need to be replaced and reprogrammed (I recommend you take it to a dealership for this). The good news is it *may* be covered under your emmissions warranty. So even if you're out of bumper-to-bumper warranty or powertrain warranty, check your warranty guide or dealer to see if this is covered.