Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

1. 3)  - This step tests for high resistance in the signal circuits and the low reference circuit of the fuel level senders.
2. 13)  - DTCs will be set in the PCM when you perform this diagnostic table.
Fig 1: Inaccurate or Inoperative (Dual Tanks) Diagnosis (Steps 1-5)
Courtesy of GENERAL MOTORS CORP.
Fig 2: Inaccurate or Inoperative (Dual Tanks) Diagnosis (Steps 6-13)
Courtesy of GENERAL MOTORS CORP.