Powertrain Control Module Reprogramming
WARNING: This page is about a different car, the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
To program PCM or if program needs to be updated, see POWERTRAIN CONTROL MODULE under PROGRAMMING in SELF-DIAGNOSTICS - 5.0L & 5.7L CHEVY EXPRESS & SAVANA. After reprogramming, perform CRANKSHAFT POSITION SENSOR SYSTEM VARIATION LEARN PROCEDURE and PROGRAMMING THEFT DETERRENT SYSTEM COMPONENTS .