Circuit/System Verification

WARNING: This page is about a different car, the 2012 GMC Yukon XL and 2012 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

If the ABS, and/or Traction Control indicators are ON with DTC C0161 5A set in history, perform the conditions for clearing the DTC and inform the customer that two footed driving set this DTC.

Ignition ON.
Verify the stop lamps turn ON and OFF while pressing and releasing the brake pedal.
- If the stop lamps do not turn ON and OFF
  Refer to Symptoms - Lighting .
- If the stop lamps turn ON and OFF
Refer to Diagnostic Aids.