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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 417 (Engine Controls - Self Diagnostics - 6.6L) >> Diagnostic Tests >> DTC P1172: Fuel Transfer Malfunction >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers in the diagnostic procedure.

  1. 2

    This step determines if the condition is on the coil side, or the switch side of the fuel pump relay.

  2. 10

    This step verifies the fuel transfer pump operation. If the test lamp flashes, then the fuel transfer pump and circuits are OK.

  3. 15

    This step tests for a fuel flow condition.
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