Engine Control Module: Removal

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Do not touch the connector pins or soldered components on the circuit board in order to prevent possible Electrostatic Discharge (ESD) damage to the PCM.

Ensure ignition is off. Disconnect negative battery cable. See Figure. Release the ECM cover mounting holes away from the mounting tabs on the ECM mounting bracket. Release the ECM cover from the mounting bracket. Remove the ECM cover. Disconnect the ECM harness connectors. Release the spring latch from the ECM. Release the ECM mounting tabs from the ECM. Remove the ECM from the engine compartment.