Diagnostic Aids

Verify that the fuel level is in the same range as the customer concern.
For intermittent diagnosis, refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS .
Refer to Fuel Level Specifications in order to verify the correct readings for the fuel level sensor.

Fig 1: Fuel Gage Inaccurate or Inoperative (Diesel) (1 Of 3)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Fuel Gage Inaccurate or Inoperative (Diesel) (2 Of 3)

Courtesy of GENERAL MOTORS CORP.

Fig 3: Fuel Gage Inaccurate or Inoperative (Diesel) (3 Of 3)

Courtesy of GENERAL MOTORS CORP.