GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the entire Power Seats System Check performed?

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Go to Step 2

Go to Power Seats System Check

2

  1. Using a test light, 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.

Does the test light illuminate in both cases?

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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 14

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4

Did the test light illuminate when the driver seat adjuster switch was in the FORWARD position?

--

Go to Step 5

Go to Step 6

5

  1. Using a test light, backprobe between the power seat switch connector terminal D and ground.
  2. Press and hold the driver seat adjuster switch to the BACK position.

Does the test light illuminate?

--

Go to Step 7

Go to Step 8

6

  1. Using a test light, backprobe between the power seat switch connector terminals E and ground.
  2. Press and hold the driver seat adjuster switch in the FORWARD position.

Does the test light illuminate?

--

Go to Step 9

Go to Step 8

7

Check for a short to ground in circuit 284.

Is there a short to ground present?

--

Go to Step 12

Go to Step 13

8

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

Is the repair complete?

--

Go to Step 14

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9

Check for a short to ground in circuit 285.

Is there a short to ground present?

--

Go to Step 10

Go to Step 11

10

Repair a short to ground in circuit 285.

Is the repair complete?

--

Go to Step 14

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11

Repair the poor connection or the open in circuit 285.

Is the repair complete?

--

Go to Step 14

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12

Repair a short to ground in circuit 284.

Is there a short to ground present?

--

Go to Step 14

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13

Repair the poor connection or the open in circuit 284.

Is the repair complete?

--

Go to Step 14

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14

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

Have all the repairs been made?

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Go to Power Seats System Check

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