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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1387 (Engine Controls And Fuel - 6.6L - DTC P2544 To DTC P2693) >> DTC P2636 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. If DTC P2632 is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
  2. Turn ON the ignition, with the engine OFF.
  3. Command the fuel pump relay ON and OFF several times with a scan tool. You should either hear or feel the fuel pump relay click with each command. The fuel pump should operate when commanded ON.
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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