06 ENVOY TRAILBLAZER IMPALA 5.3L PCM ECU ECM ENGINE COMPUTER 12603993 ✅TESTED✅

12596679 AND 12603993 - Please match both of these!

ECM will require programming to your vehicle and is not plug and play.

ECU has been tested with our state of the art vehicle simulator which tests over 25 circuits of the ECU! Some of those are listed below:

• All 4 O2 heaters are good!
• ECU powered up and has communication!
• ECU fuel pump relay test good!
• ECU A/C and starter relay control test good
• ECU canister vent/purge control are good!
• ECU tac motor is good!
• ECU injectors/coils test good and much more!

• You must match your part number exactly as seen above. If any numbers are off compared to your original it will not work properly.
• Ecu will require programming or coding to your vehicle or vehicle's security system and is not plug and play.
• Ecu will fit 2006 Chevrolet Trailblazer, Impala SS, Monte Carlo, GMC Envoy and Pontiac Grand Prix 5.3L models with an exact part number match.
• ECU may fit other vehicles with the same part number. Programming will be required!

Pins perfect, none are broken or bent

This ECM comes with a 90 day warranty from the date of purchase. Please keep a copy of your purchase record which we will send with your item.