Test Description

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

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

3) - This step tests for high resistance in the signal circuits and the low reference circuit of the fuel level senders.
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.