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:

   •  Power Seats System Description and Operation
   •  Heated Seats Description and Operation

Visual/Physical Inspection

    • Inspect for aftermarket devices which could affect the operation of the Seat Systems. Refer to Checking Aftermarket Accessories in Wiring Systems.
    • 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. Refer to Power Seat Adjuster Mechanical Diagnosis .

Intermittent

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

Symptom List

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

    •  Power Seat Inoperative
    •  Heated Seat Always On
    •  Heated Seat Inoperative