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Without Feedback Fuel System

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  1. Release fuel system pressure. See FUEL SYSTEM PRESSURE RELEASE . Raise and support vehicle. Remove both of the rear wheel and tire assemblies.
  2. Attach a length of flexible fuel hose to an air operated pump device. Position an approved drain container under the left tank fuel sender. Wrap a shop towel around the left tank fuel feed rear pipe. See Fig 1.
  3. Disconnect the fuel feed rear pipe at the left tank fuel sender using the Fuel Line Quick-Connect Separator (J-37088-A). See FUEL LINE DISCONNECT FITTINGS . Attach the flexible fuel hose from the pump device to the fuel feed pipe nipple using a screw type clamp. Drain the left fuel tank until no fuel comes out.
  4. Disconnect the pump device from the left tank fuel feed pipe nipple. Cap the fuel feed pipe nipple and the fuel feed rear pipe. Position an approved drain container under the right tank fuel sender. Wrap a shop towel around the auxiliary fuel return rear pipe that connects at the right fuel sender assembly. See Figure.
  5. Using the Fuel Line Quick-Connect Separator, disconnect the auxiliary fuel return rear pipe that connects at the right tank fuel sender assembly. Attach the flexible fuel hose from the pump device to the auxiliary fuel return rear pipe nipple using a screw type clamp.
  6. Drain the right tank until no fuel comes out. Disconnect the pump device from the right tank fuel sender nipple. Cap the auxiliary fuel return rear pipe nipple and the auxiliary fuel return rear pipe.
Fig 1: Identifying Fuel Lines At Left Fuel Tank
G00114717Courtesy of GENERAL MOTORS CORP.