GM Service Manual Online
For 1990-2009 cars only

Power Door Locks

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

  1. Perform the Diagnostic System Check - Vehicle , before using the Symptom Tables in order to verify that all of the following are true:
  2. • There are no DTCs set.
    • The control modules can communicate via the serial data link.
  3. Review the system operation in order to familiarize yourself with the system functions:
  4. •  Power Door Locks Description and Operation
    •  Rear Hatch/Gate Description and Operation

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:

    •  Door Ajar Indicator Description and Operation
    •  Power Door Locks Inoperative
    •  Automatic Door Locks Inoperative
    •  Hatch Release Inoperative