Powertrain Control Module (4.2L): Notes
WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Programing Powertrain Control Module requires a compatible scan tool and a Techline® terminal. Procedure uses a Tech 2™ scanner.