GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Power Seats Schematics

1

Did you review the Power Seat System Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Seats

2

Attempt to operate all of the power seat adjuster motors through their full range of adjustment.

Do all of the power seat adjuster motors operate properly?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Are all of the power seat adjuster motors inoperative?

Go to Step 4

Go to Step 6

4

Test and repair the battery positive voltage supply circuit to the seat adjuster switch for an open, high resistance, or short to ground. Refer to Circuit Testing and Wiring Repairs or Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 10

Go to Step 5

5

Test and repair the seat adjuster switch ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs or Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 10

Go to Step 6

6

  1. Disconnect the inoperative adjuster motor connector.
  2. Connect a test lamp across the inoperative adjuster motor control circuit terminals.
  3. Press the inoperative seat adjuster switch in both directions.

Does the test lamp illuminate when the switch is pressed in both directions?

Go to Step 8

Go to Step 7

7

  1. Disconnect the seat adjuster switch connector.
  2. Test and repair the inoperative adjuster motor control circuits for an open, high resistance, or short to ground. Refer to Circuit Testing and Wiring Repairs or Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 10

Go to Step 9

8

Replace the seat adjuster motor. Refer to Front Seat Adjuster Motor Replacement .

Is the repair complete?

Go to Step 10

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9

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

Is the repair complete?

Go to Step 10

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10

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2