2006 Chevy Trailblazer 4.2 TESTED Engine Control Module ECM OEM# 12604439 (YMSR)

USED 2006 Chevy Trailblazer Engine Control Module 12597521 / 19209820

2006 Trailblazer Engine computer 12597521 "Programmed to your VIN" ECM PCM ECU

2006 CHEVY TRAILBLAZER 4.2L ENGINE COMPUTER VIN PROGRAMMED ECM PCM ECU 12597521

2006 CHEVROLET TRAILBLAZER 4.2L ENGINE COMPUTER CONTROL MODULE ECM ECU 12606398

GM ECM Engine Computer 12600928 Trailblazer Envoy 4.2L Untested

2006 Colorado Engine computer 12597521 "Programmed to your VIN" ECM PCM ECU

✅ VIN PROGRAMMED 06 Chevy Colorado 2.8/3.5L Engine Computer 12597521 ECM PCM