GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Folding Top Schematics and Instrument Cluster Schematics

Connector End View Reference: Folding Top Connector End Views Displays and Gages Connector End Views

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

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 body control module (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 .

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 BCM. Refer to Circuit Testing and Wiring Repairs .

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 .

Did you find and correct the condition?

Go to Step 11

Go to Step 9

8

Replace the BCM. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 11

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9

Replace the rear compartment lid latches. Refer to Rear Compartment Lid and Fuel Filler Door Release Switch Replacement .

Did you complete the replacement?

Go to Step 11

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10

Replace the instrument panel cluster (IPC). Refer to Control Module References for replacement, setup, and programming.

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