Action Taken When the DTC Sets
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- DTCs P0601, P0602, P0603, P0604, and P1621 are Type A DTCs.
- The TCM shifts to a default gear, shuts down, and turns OFF.