GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the entire lumbar support system check performed?

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Go to Step 2

Go to Lumbar Support System Check

2

  1. Connect a test light to ground.
  2. Backprobe the lumbar inflator switch connector terminal of the suspect seat.
  3. Operate the lateral bladder using the lumbar inflator switch to the INFLATE or DEFLATE positions while observing the test light.

Does the test light illuminate while operating the switch?

--

Go to Step 3

Go to Step 4

3

  1. Connect a test light to ground.
  2. Backprobe the power seat cushion air control module inflate terminal of the suspect seat.
  3. Operate the lateral bladder using the lumbar inflator switch to the INFLATE or DEFLATE positions while observing the test light.

Does the test light illuminate while operating the switch?

--

Go to Step 5

Go to Step 6

4

Replace the lumbar inflator switch. Refer to Power Seat Adjuster Mechanism Replacement

Is the repair complete?

--

Go to Step 9

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5

Replace the power seat cushion air control module. Refer to Lumbar Motor Replacement

Is the repair complete?

--

Go to Step 9

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6

Inspect for a short to ground in the inflate circuits between the lumbar inflator switch connector and the power seat control module connector.

Is a short to ground present?

--

Go to Step 7

Go to Step 8

7

Repair the short to ground.

Is the repair complete?

--

Go to Step 9

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8

Repair the open in the inflate circuits between the lumbar inflator switch connector and the power seat cushion air control module connector.

Is the repair complete?

--

Go to Step 9

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9

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

Have all the repairs been made?

--

Go to Lumbar Support System Check

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