Conditions for Running the DTC
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.
- The ignition switch in the OFF position.
- Unlock doors from the keyless entry transmitter, or open any door, or turn ON the dome lamp from the switch (thumbwheel).