GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Body Rear End Schematics

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

Operate the rear compartment lid release switch.

Does 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 command the rear compartment lid release to open.

Does the rear compartment lid release?

Go to Step 4

Go to Step 8

4

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

Does the rear compartment lid release?

Go to Step 5

Go to Step 6

5

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

Does the rear compartment lid release?

Go to Step 10

Go to Step 12

6

  1. Disconnect the rear compartment lid release actuator.
  2. Connect a test lamp between the rear compartment lid release actuator signal circuit and a good ground.
  3. Operate the rear compartment lid release switch.

Does the test lamp illuminate?

Go to Step 7

Go to Step 15

7

  1. Connect a test lamp between the rear compartment lid release actuator signal and ground circuits.
  2. Operate the rear compartment lid release switch.

Does the test lamp illuminate?

Go to Step 11

Go to Step 13

8

  1. Remove the rear compartment lid release relay.
  2. Connect a test lamp between the rear compartment lid release relay battery positive circuit and a good ground.

Does the test lamp illuminate?

Go to Step 9

Go to Step 14

9

Connect a fused jumper wire between the rear compartment lid release relay battery positive circuit and the rear compartment lid release actuator signal circuit.

Does the rear compartment lid release?

Go to Step 16

Go to Step 15

10

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

Did you find and correct the condition?

Go to Step 19

Go to Step 17

11

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

Did you find and correct the condition?

Go to Step 19

Go to Step 18

12

Repair the 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 19

--

13

Repair the open or high resistance in the ground circuit of the rear compartment lid release actuator. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 19

--

14

Repair the open or high resistance in the battery positive circuit of the rear compartment lid release relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 19

--

15

Repair the open or high resistance in the signal circuit of the rear compartment lid release actuator. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 19

--

16

Replace the rear compartment lid release relay.

Did you find and correct the condition?

Go to Step 19

--

17

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

Did you find and correct the condition?

Go to Step 19

--

18

Replace the rear compartment lock cylinder. Refer to Rear Compartment Lid Lock Cylinder Replacement .

Did you find and correct the condition?

Go to Step 19

--

19

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3