Conditions for Clearing the MIL/DTC
WARNING: This page is about a different car, the 2007 GMC Sierra, 2007 GMC Cab & Chassis Sierra, 2007 Chevrolet Silverado, and 2007 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
DTCs P2120, P2122, P2123, P2125, P2127, P2128, and P2138 are Type A DTCs.