GM Service Manual Online
For 1990-2009 cars only

Step

Action

Values

Yes

No

1

Was the entire power seats system check performed?

--

Go to Step 2

Go to Power Seats System Check

2

  1. Using a DMM, backprobe between the forward/back motor connector terminals A and B.
  2. Press and hold the driver seat adjuster switch to the FORWARD position and then the BACK position.

Is voltage present in both cases?

9-14 V

Go to Step 3

Go to Step 4

3

Replace the seat adjuster mechanism. Refer to Manual Seat Adjuster Mechanism Replacement

Is the repair complete?

--

Go to Step 9

--

4

  1. Disconnect the power seat switch.
  2. Check for a short to ground in circuit 284 and 285.

Is a short to ground present?

--

Go to Step 5

Go to Step 6

5

Repair a short to ground in circuit 284 or 285.

Is the repair complete?

--

Go to Step 9

--

6

Using a DMM, check continuity in circuits 284 and 285.

Is continuity present in both circuits?

--

Go to Step 7

Go to Step 8

7

Replace the power seat switch. Refer to Power Seat Adjuster Mechanism Replacement .

Is the repair complete?

--

Go to Step 9

--

8

Repair the poor connection or the open in circuit 284 or 285.

Is the repair complete?

--

Go to Step 9

--

9

  1. Turn the ignition switch to the OFF position.
  2. Reconnect all connectors/components removed.

Have all the repairs been made?

--

Go to Power Seats System Check

--