GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1998 🢒 Trans Sport Ext. 🢒 Suspension 🢒 Automatic Level Control 🢒 Automatic Level Control Compressor Motor Always On

Step

Action

Value(s)

Yes

No

1
  1. Disconnect the auto level control air inflator relay.
  2. Using a test light, backprobe the auto level control air inflator relay harness connector terminal A to terminal D.
  3. Press the air inflator switch OFF button.

Is the test light on?

--

Go to Step 2

Go to Step 3

2

Replace the auto level control air inflator relay. Refer to:

    •  Automatic Level Control Relay Replacement for long wheel base with HVAC
    •  Automatic Level Control Relay Replacement for long wheel base without HVAC
    •  Automatic Level Control Relay Replacement for short wheel base

Has the repair been made and the system rechecked?

--

System OK

--

3

Replace the auto level control air inflator switch. Refer to:

    •  Automatic Level Control Inflator Air Switch Replacement for long wheel base with HVAC
    •  Automatic Level Control Inflator Air Switch Replacement for long wheel base without HVAC

Has the repair been made and the system rechecked?

--

System OK

--