GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Fuel Filler Door Release System Check ?

--

Go to Step 2

Go to Fuel Filler Door Release System Check

2

Pull the manual release on the fuel door release actuator .

Does the fuel door open?

--

Go to Step 4

Go to Step 3

3

Replace the fuel door. Refer to Fuel Tank Filler Door Replacement .

Is the repair complete?

--

Go to Step 15

--

4

  1. Disconnect the fuel door release actuator connector.
  2. Connect J 39200 digital multimeter (DMM) between connector terminal B and ground.

Is the measured voltage within the specified range?

10-15V

Go to Step 6

Go to Step 5

5

Check the TRUNK REL fuse.

Is the fuse OK?

--

Go to Step 13

Go to Step 14

6

  1. Connect a DMM between the fuel door release actuator connector terminals A and B.
  2. Depress the fuel door release switch.

Is the measured voltage within the specified range?

10-15V

Go to Step 7

Go to Step 8

7

  1. Check the fuel door release actuator connector for poor terminal contact.
  2. If OK, replace the fuel door release actuator. Refer to Fuel Tank Filler Door Lock Actuator Replacement .

Is the repair complete?

--

Go to Step 15

--

8

  1. Disconnect the fuel door release switch connector.
  2. Use a DMM to measure the resistance between switch connector terminal B and ground.

Is the resistance within the specified range?

Less than 5ohms

Go to Step 10

Go to Step 9

9

Repair the open in CKT 450 (BLK) between the fuel door release switch and ground G201.

Is the repair complete?

--

Go to Step 15

--

10

  1. Connect a fused jumper across the fuel door release switch connector terminals A and B.
  2. Use a DMM to measure the resistance between the fuel door release actuator connector terminal A and ground.

Is the resistance within the specified range?

Less than 5ohms

Go to Step 11

Go to Step 12

11

  1. Check the fuel door release switch connector for poor terminal contact.
  2. If OK, replace the fuel door release switch. Refer to Fuel/Rear Compartment Release Switch Replacement in Instrument Panel, Gauges and Console.

Is the repair complete?

--

Go to Step 15

--

12

Repair CKT 79 (PNK)

Is the repair complete?

--

Go to Step 15

--

13

Repair the open in CKT 1140 (ORN).

Is the repair complete?

--

Go to Step 15

--

14

  1. Repair the short to ground in CKT 1140 (ORN).
  2. Replace the TRUNK REL fuse.

Is the repair complete?

--

Go to Step 15

--

15

  1. Make sure any components removed during diagnosis are installed in place and that all connectors are connected.
  2. Repeat the system check. Refer to Fuel Filler Door Release System Check .

Is the system check complete?

--

System OK

--