GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you review the operation and perform the necessary inspections?

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Go to Step 2

Go to Symptoms

2

Disconnect the liftgate door lock (ajar indicator switch).

Does the rear hatch ajar message turn off on the IP reconfigurable telltale?

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Go to Step 3

Go to Step 4

3

Replace the liftgate door lock (ajar indicator switch). Refer to Liftgate Latch Replacement .

Is the repair complete?

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Go to Step 6

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4

Test the signal circuit of the trunk ajar switch for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 6

Go to Step 5

5

Replace the IPC. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges, and Console.

Important: Perform the set up procedure for the IP.

Did you complete the replacement and the set up procedure?

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Go to Step 6

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6

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 2