GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Connect a 10 A fused jumper from the air inflator switch terminal A to terminal B.
  2. Using a test light, backprobe the auto level control air inflator relay harness connector terminal C to ground.

Is the test light on?

--

Go to Step 2

Go to Step 3

2

  1. Disconnect the auto level control air inflator solenoid valve.
  2. Using a test light, probe between the auto level control air inflator solenoid valve harness connector terminal A to terminal B.

Is the test light on?

--

Go to Step 4

Go to Step 5

3

Replace auto level control air inflator relay. Refer to Automatic Level Control Relay Replacement .

Has the repair been made and the system rechecked?

--

System OK

--

4

Replace the auto level control air inflator solenoid valve. Refer to Inflator Solenoid Replacement .

Has the repair been made and the system rechecked?

--

System OK

--

5

Check for a poor connection or open in CKT 1249.

Is there a poor connection or open in CKT 1249?

--

Go to Step 7

Go to Step 6

6

Repair the poor connection or open in CKT 1725 between the auto level control air inflator solenoid valve harness connector terminal B to G401.

Has the repair been made and the system rechecked?

--

System OK

--

7

Repair the poor connection or open in CKT 1249.

Has the repair been made and the system rechecked?

--

System OK

--