GM Service Manual Online
For 1990-2009 cars only

Note: The following steps must be completed before using the symptom tables:

  1. Perform Diagnostic System Check - Vehicle , in order to verify that all of the following conditions are true:
  2. • No DTCs are set.
    • The control modules can communicate via the serial data link.
  3. Refer to Wiper/Washer System Description and Operation in order to familiarize yourself with the system functions.

Visual/Physical Inspection

    • Inspect for aftermarket devices which may affect the operation of the windshield wiper / washer system. Refer to Checking Aftermarket Accessories.
    • Inspect the easily accessible or visible system components for obvious damage or conditions which may cause the symptom.
    • Inspect the washer fluid reservoir for the proper fluid level.

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:

    •  Windshield Wiper System Malfunction
    •  Washer Malfunction
    •  Rain Sensor Malfunction
    •  Rear Wiper System Malfunction
    •  Rear Washer System Malfunction
    •  Headlamp Washer Malfunction