Alternative Fuel Engine Control Module
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.
After replacing Alternative Fuel Engine Control Module (AF ECM) or if program needs to be updated (flashed), refer to latest Techline(tm) information on AF ECM reprogramming.