GM Service Manual Online
For 1990-2009 cars only

Lumbar Support/Bolster Inoperative Pontiac w/ AL7

Step

Action

Value(s)

Yes

No

DEFINITION: This table diagnoses problems with the air system.

1

Did you perform the entire Lumbar Support System Check?

--

Go to Step 2

Go to Lumbar Support System Check

2

Is the symptom present for all of the seat lumbar switches?

--

Go to Step 3

Go to Step 8

3

Test for an open or disconnected air line at one of the following components:

    • Seat air pump
    • Solenoid valve assembly
    • In the tubing between the seat air pump and the seat cushion air valve assembly

Are the air lines OK?

--

Go to Step 5

Go to Step 4

4

Repair the air line problem.

Is the repair complete?

--

Go to Lumbar Support System Check

--

5

Test the seat cushion air valve assemblies for leakage.

Are the seat cushion air valve assemblies OK?

--

Go to Step 6

Go to Step 7

6

Replace the seat air pump.

Is the repair complete?

--

Go to Lumbar Support System Check

--

7

Replace the suspect seat cushion air valve assembly.

Is the repair complete?

--

Go to Lumbar Support System Check

--

8

Test the associated air line for leaks between the seat cushion air valve assembly and the lumbar bladder.

Are the air lines OK?

--

Go to Step 9

Go to Step 4

9

Test the lumbar bladder for leaks.

Is the bladder OK?

--

Go to Step 5

Go to Step 10

10

Replace the lumbar bladder.

Is the repair complete?

--

Go to Lumbar Support System Check

--