GM Service Manual Online
For 1990-2009 cars only

Important: Review the system description in order to familiarize yourself with the system functions. Refer to one of the following descriptions:

   •  Lumbar Support Description and Operation
   •  Power Seats System Description and Operation

Visual/Physical Inspection

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

    •  Lumbar Support Inoperative
    •  Power Seat Inoperative