Circuit/System Testing
WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect for DTC P1AC6 or any communication DTCs.
- If the specified DTCs are set, repair them first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- 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.