GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Driver Seat Schematicsor Passenger Seat Schematics

Connector End View Reference: Power Seat Connector End Views

DEFINITION: This table assumes that all mechanical linkage and drivers are free from obstruction and not binding. This also assumes that all other directions are operational.

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

Operate the Power Seat System.

Does the system operate normally?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

  1. Disconnect the rear vertical motor.
  2. Connect a test lamp between the rear vertical motor control circuits.
  3. Operate the power seat switch to the rear up and rear down positions.

Did the test lamp illuminate for each switch position?

Go to Step 6

Go to Step 4

4

Test the control circuits for the rear vertical motors for a open or a short to ground. Refer to Circuit Testing.

Did you find and correct the condition?

Go to Step 9

Go to Step 5

5

Inspect the poor connections at the harness connector of the power seat switch. Refer to Testing for Intermittent Conditions and Poor Connections.

Did you find and correct the condition?

Go to Step 9

Go to Step 8

6

Inspect the poor connections at the harness connector of the rear vertical motor. Refer to Testing for Intermittent Conditions and Poor Connections.

Did you find and correct the condition?

Go to Step 9

Go to Step 7

7

Replace the rear vertical motor. Refer to Front Seat Adjuster Replacement.

Did you complete the replacement?

Go to Step 9

--

8

Replace the power seat switch. Refer to Power Seat Switch Replacement.

Did you compete the replacement?

Go to Step 9

--

9

Operate the system to verify the repair.

Did you correct the condition?

System OK

Go to Step 3