GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Did you perform the Body Rear End Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Body Rear End

2

  1. Place the transmission in the PARK position.
  2. Operate the rear compartment lid release switch.

Did the rear compartment lid release?

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

Go to Step 3

3

  1. Install a scan tool.
  2. Turn ON the ignition with the engine OFF.
  3. With a scan tool observe the rear compartment lid switch release input.

Does the scan tool display inactive?

Go to Step 4

Go to Step 10

4

  1. With a scan tool observe the rear compartment lid release input.
  2. Operate the rear compartment lid release switch.

Does the rear compartment lid release input parameter change states?

Go to Step 7

Go to Step 5

5

  1. Disconnect the rear compartment lid release switch.
  2. Connect a fused jumper between the rear compartment lid release switch input and a good ground.

Does the scan tool display active?

Go to Step 6

Go to Step 11

6

Connect a fused jumper between the rear compartment lid release switch input and the rear compartment lid release switch ground.

Does the scan tool display active?

Go to Step 12

Go to Step 13

7

  1. With a scan tool observe the rear compartment lid release output.
  2. Operate the rear compartment lid release switch.

Does the rear compartment lid release output parameter change states?

Go to Step 8

Go to Step 14

8

Connect a test lamp between the rear compartment lid latch input and a good ground.

Does the test lamp illuminate?

Go to Step 9

Go to Step 15

9

Connect a test lamp between the rear compartment lid latch input and the rear compartment lid latch ground.

Does the test lamp illuminate?

Go to Step 16

Go to Step 17

10

  1. With a scan tool observe the rear compartment lid release switch input.
  2. Disconnect the rear compartment lid release switch.

Does the scan tool display inactive?

Go to Step 12

Go to Step 18

11

Test for an open or high resistance in the signal circuit of the rear compartment lid release switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

--

12

Inspect for poor connections at the harness connector of the rear compartment lid release switch connector. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 19

13

Test for an open or high resistance in the ground circuit of the rear compartment lid release switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

--

14

Inspect for poor connections at the harness connector of the body control module (BCM) connector. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

Go to Step 20

15

Test for an open or high resistance in the signal circuit of the rear compartment lid latch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

--

16

Inspect for poor connections at the harness connector of the rear compartment lid latch connector. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

--

17

Test for an open or high resistance in the ground circuit of the rear compartment lid latch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

--

18

Test for a short to ground in the rear compartment lid release switch signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 21

--

19

Replace the rear compartment lid release switch. Refer to Rear Compartment Lid Switch Replacement .

Did you find and correct the condition?

Go to Step 21

--

20

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

Replace the BCM. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 21

--

21

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3