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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 107 (Instrument Panel - C/K Series Pickups) >> Component Tests >> Fuel Gauge Testing & Diagnosis >> Gauge Stays At Full Position

Gauge Stays At Full Position

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1991 GMC Pickup, 1991 GMC Cab & Chassis, 1991 GMC C3500 HD, 1991 Chevrolet Pickup, and 1991 Chevrolet Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition on. Check for open circuit between gauge and sending unit by disconnecting sending unit lead at fuel tank. Connect sending unit lead to ground, and note gauge reading.
  2. If fuel gauge now reads EMPTY, replace fuel gauge sending unit. If fuel gauge still reads FULL or beyond, repair open in wire between gauge and fuel tank.
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