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Fuel Pump Module: Installation

NOTE: If a new fuel pump module is being installed, make sure that fuel level sender is installed on module BEFORE installing into fuel tank.
  1. Inspect fuel tank and clean the fuel tank seal groove of any foreign debris and install a new seal.
    NOTE: The correct seal is green in color. Do not use the older black seal.
  2. Verify that the float arm on the fuel level sender has not been bent by standing the fuel pump module on a flat, horizontal surface and measuring the distance from this surface and the bottom of the float. A 5/32 in. diameter drill can be used as a gage. The gage must freely pass between the float and the horizontal surface with no more than 1/16 in. clearance.
    Fig 1: Testing Float
    G01068285Courtesy of GENERAL MOTORS CORP.
    NOTE: If the float arm requires repositioning to meet the clearance specification, assure that any bending is performed at the 90° bend near the level sender. The short section of the float arm going into the level sender must be supported so that bending does not take place at the level sender.
  3. Carefully install the fuel pump module with sending unit in the fuel tank by orienting the float to face the right side of the tank, tilting the pump module approximately 45°, and loading the float arm and pump into the tank opening. Insert the pump module all the way down into the tank and then rotate 90° counterclockwise to align the module orientation tabs with slots in the tank opening. Correctly oriented, the lines from the pump module will be facing the 10 o'clock position (12 o'clock is front of tank).
    Fig 2: Installing Fuel Pump Module
    G01068286Courtesy of GENERAL MOTORS CORP.
    NOTE: The fuel pump retaining ring cannot be properly installed if the pump flange locator tabs are not aligned with the slots in the tank.
  4. Install the retaining lock ring using service tool SA9156E.
  5. Connect fuel pump vapor line to fuel tank vent pipe.
  6. Connect fuel feed and return lines to filter/pressure regulator.
  7. Position fuel feed, fuel return and EVAP canister purge line in fuel tank retaining clip and "snap" shut.
  8. Install "loose" retainer clip around fuel feed, return, and purge line at upsets and "snap" closed.
  9. Install the fuel tank. Refer to FUEL TANK .
  10. Perform the "Service Bay Diagnostic Test" for the evaporative emission system using the Scan tool. This test will verify the integrity of the vapor handling areas of the fuel system.