GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Body Rear End Schematics

1

Did you review the Body Rear End description and operation and perform the necessary inspections?

Go to Step 2

Go to Luggage Compartment Description and Operation

2

Close the tonneau.

Is the tonneau ajar indicator illuminated?

Go to Step 3

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

3

  1. Install a scan tool.
  2. Turn the ignition ON with the engine OFF.
  3. With a scan tool observe the tonneau ajar switch signal parameter in the BCM Input Data 2 data list.

Does the scan tool display open?

Go to Step 4

Go to Step 10

4

  1. Disconnect the folding top lid latch.
  2. With a scan tool observe the tonneau ajar switch signal parameter in the BCM Input Data 2 data list.

Does the scan tool display open?

Go to Step 5

Go to Step 7

5

Test for a short to ground in the signal circuit of the folding top lid latch ajar circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

Go to Step 6

6

Inspect for poor connections at the harness connector of the body control module. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

Go to Step 8

7

Inspect for poor connections at the harness connector of the folding top lid latch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

Go to Step 9

8

Important: When replacing the body control module refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.

Replace the body control module. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 11

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9

Replace the rear compartment lid latch(s). Refer to Rear Compartment Lid Switch Replacement .

Did you complete the replacement?

Go to Step 11

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10

Replace the instrument cluster. Refer to Driver Information Display Switch Replacement in Instrument Panel, Gages, and Console.

Did you complete the replacement?

Go to Step 11

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11

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3