OEM Chevrolet Silverado 3500 Classic Engine Control Module

Chevrolet Silverado 3500 Classic Engine Control Module Parts Questions & Experts Answers

• ECM
  12602801
  Q: How to replace the Engine Control Module on Chevrolet Silverado 3500 Classic?

  A: You need to use a scan tool to get the percentage of engine oil life before starting the pcm replacement process. First disconnect the negative Battery Cable followed by removal of the harness ground clip from the pcm cover when nys is present as a regular production option. The removal of the hybrid control module (HCM) must happen for vehicles that have rpo hp2 in their specifications. The release of pcm cover mounting tabs enables the removal of the pcm cover. The procedure to disconnect pcm electrical connectors requires loosening connector bolts only after switching the ignition off to avoid electrical connector damage. Free the spring latch and mounting tabs attached to the pcm and proceed to take the pcm out. The installation process requires you to fit the pcm mounting tabs before securing the spring latch followed by connecting all pcm electrical connectors. Secure the pcm electrical connector bolts with appropriate torque of 8 n.m (71 lb in). As part of using rpo hp2 install both the pcm cover followed by the hcm. Rpo nys requirements demand installation of the harness ground clip on the pcm cover. After negative Battery Cable reattachment proceed with pcm programming to prevent 100 percent engine oil life activation therefore requiring an oil change at 5000 km (3,000 mi) from the last change.