GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform fuel filler door system check ?

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Go to Fuel Filler Door Release System Check

2

  1. Place the transaxle in the PARK position.
  2. Turn the valet switch OFF.
  3. Connect the scan tool.
  4. Press the fuel door release switch.

Does the Body Control Module (PZM) command the fuel door release ON?

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Go to Step 3

Go to Step 7

3

  1. Disconnect the fuel door release relay.
  2. Connect a test lamp between terminal D7 and ground, and terminal D9 to ground.

Does the test lamp light at both terminals?

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Go to Step 4

Go to Step 14

4

  1. Connect the test lamp between terminal D7 and terminal C9.
  2. Press the fuel door release switch.

Does the test lamp light?

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Go to Step 5

Go to Step 15

5

Connect a fused jumper between terminal D9 and terminal C7.

Does the fuel door open?

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Go to Step 6

Go to Step 16

6

Replace the fuel door release relay.

Does the fuel door release operate properly?

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Go to Fuel Filler Door Release System Check

Go to Step 7

7

Observe the scan tool.

Does the PZM indicate that the valet switch is OFF?

--

Go to Step 8

Go to Step 11

8

Using the scan tool, observe the status of the automatic transaxle internal mode switch.

Does the status show that the vehicle is in PARK?

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Go to Step 9

Go to Step 10

9

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

Does the fuel door release operate properly?

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Go to Fuel Filler Door Release System Check

Go to Step 11

10

Inspect the wiring to the automatic transaxle internal mode switch. Perform any necessary repairs.

Does the fuel door release operate properly?

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Go to Fuel Filler Door Release System Check

Go to Step 11

11

  1. Disconnect the valet switch.
  2. Connect a fused jumper from valet switch connector terminal A to ground.
  3. Observe the scan tool.

Does the PZM indicate that the valet switch is OFF?

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Go to Step 12

Go to Step 13

12

  1. Test CKT 151 (BLK) for an open. Repair as necessary. Refer to Wiring Repairs in Wiring Systems.
  2. If OK, replace the valet lockout switch.

Does the fuel door release operate properly?

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Go to Fuel Filler Door Release System Check

Go to Step 13

13

  1. Test CKT 1355 (DK BLU/WHT) for an open. Repair as necessary. Refer to Wiring Repairs in Wiring Systems.
  2. If OK, replace the valet lockout switch.

Does the fuel door release operate properly?

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Go to Fuel Filler Door Release System Check

Go to Step 14

14

Repair the open or short to ground in one of the following circuits:

    • CKT 40 (ORN)
    • CKT 2040 (ORN)

Does the fuel door release operate properly?

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Go to Fuel Filler Door Release System Check

Go to Step 15

15

  1. Inspect CKT 93 for an open. Repair as necessary.
  2. If OK, replace the PZM. Refer to Body Control Module Replacement in Body Control System.

Does the fuel door release operate properly?

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Go to Fuel Filler Door Release System Check

Go to Step 16

16

  1. Ensure that the fused jumper is still connected.
  2. Disconnect the fuel door release solenoid.
  3. Connect a test lamp between terminal A and ground.

Does the test lamp light?

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Go to Step 17

Go to Step 20

17

  1. Ensure that the fused jumper is still connected.
  2. Connect a test lamp between the fuel door release solenoid terminal A and terminal B.

Does the test lamp light?

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Go to Step 18

Go to Step 19

18

  1. Verify that the fuel door release solenoid connector is clean and tight.
  2. If OK, replace the fuel door release actuator.Go to Fuel Tank Filler Door Lock Actuator Replacement in Body Rear End.

Does the fuel door release operate properly?

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Go to Fuel Filler Door Release System Check

Go to Step 19

19

Repair the open in CKT 1150 (BLK)Refer to Wiring Repairs in Wiring Systems.

Does the fuel door release operate properly?

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Go to Fuel Filler Door Release System Check

Go to Step 20

20

Repair the open in CKT 79 (PNK)Refer to Wiring Repairs in Wiring Systems.

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Go to Fuel Filler Door Release System Check

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