Test Description

The numbers below refer to the step numbers on the diagnostic table.

1. 2. This step tests for a malfunction in the fuel level sensor.
2. 3. This step tests for a malfunction in the fuel level sensor signal circuit of the fuel balance module.
3. 11. This step tests for a malfunction in the fuel level sensor signal circuit of the PCM.
4. 20. DTCs will set in the PCM when you perform this diagnostic table.

Fig 1: Fuel Gage Inaccurate Or Inoperative (Dual Tank 8.1L Gasoline Engine) (1 Of 3)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Fuel Gage Inaccurate Or Inoperative (Dual Tank 8.1L Gasoline Engine) (2 Of 3)

Courtesy of GENERAL MOTORS CORP.

Fig 3: Fuel Gage Inaccurate Or Inoperative (Dual Tank 8.1L Gasoline Engine) (3 Of 3)

Courtesy of GENERAL MOTORS CORP.