Conditions for Running the DTC
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- DTCs P0642, P0643, P0698, P0699, P2127, P2128, P2132, P2133 are not set.
- The ignition switch is in the Crank or Run position.
- The ignition voltage is between 7-16 volts.