Circuit/System Verification

WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Inspect for DTCs P0ABB, P0ABC, P0ABD, loss of communication with the BECM U-code DTCs, or any other concern that would indicate high voltage to the PIM was interrupted while high current was present.
- If the specified DTCs are set, or high voltage interruption is suspected, diagnose them first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
Clear the DTC information.
Ignition OFF for 1 minute.
Ignition ON.
Retest for DTCs P1AEC, P1AED, P1AEE and P1AEF.

If the DTC resets, program the PIM with the latest software version and recheck for DTCs. If the DTC resets after programming or if the PIM already contains the latest software version, replace the PIM.