PRNDL Display
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.
The IPC displays the selected gear position as determined by the ECM. The IPC receives a GMLAN message from the ECM indicating the gear position. The PRNDL display blanks if:
- The ECM detects a malfunction in the transmission range switch circuit.
- The IPC detects a loss of GMLAN communications with the ECM.