GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Suspension Controls Schematics

Connector End View Reference: Suspension Controls Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle ?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

Verify the fault is present by performing the following steps:

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Using a scan tool, access the ESC Data List menu and observe the voltage level of each individual position sensor while pushing down and releasing at each corner.

Does the voltage increase and decrease as the vehicle responds to the pushing down and releasing?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Replace the appropriate position sensor. Refer to Electronic Suspension Front Position Sensor Replacement or Electronic Suspension Rear Position Sensor Replacement .

Did you complete the replacement?

Go to Step 4

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4

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2