GM Service Manual Online
For 1990-2009 cars only

Important: Review the system operation in order to familiarize yourself with the system functions. Refer to :

    •  Exterior Lighting Systems Description and Operation
    •  Interior Lighting Systems Description and Operation

Visual/Physical Inspection

    • Inspect for aftermarket devices which could affect the operation of the Lighting System. Refer to Checking Aftermarket Accessories .
    • Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

    •  Backup Lamps Malfunction
    •  Daytime Running Lamps Malfunction
    •  Dome Lamps Malfunction
    •  Headlamps Malfunction
    •  Interior Backlighting Malfunction
    •  Marker Lamps Malfunction
    •  Park Lamps Malfunction
    •  Stop Lamps Malfunction
    •  Turn Signal Lamps and/or Indicators Malfunction