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Home >> Pontiac >> 2004 >> GTO Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls -- 5.7L -- (Introduction) >> Repair Instructions >> Fuel Sender Assembly Replacement >> Installation Procedure
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Installation Procedure

    IMPORTANT: Upon installation of the modular fuel pump and sender assembly, only use the custom sized O-rings as supplied with modular fuel pump and sender assembly replacement parts kit. Do not use off-the-shelf O-rings.
  1. Before installation into the fuel tank, check the fuel sender float position.
    • Stand the assembly upright on a flat surface
    • Measure the distance between the middle of the fuel sender float and the flat surface
    • If required, the float position should be corrected, through careful adjustment of the float arm.
    • Float Position:  7 mm to 14 mm.
  2. Clean any dirt and foreign materials from the fuel tank seal recess and position a new seal in the recess.
  3. Install the modular fuel pump and sender assembly into the fuel tank, taking care not to damage the fuel level sender float and arm in the process.
  4. Insert hand into the fuel tank opening and connect the fuel feed line quick connector.
  5. Connect the fuel tank EVAP vapor line quick connector from the underside of the modular fuel pump and sender assembly cover.
  6. Fig 1: Engaging Cover Locator In Tank Opening Slot
    GM1372245Courtesy of GENERAL MOTORS CORP.
  7. Ensure the locator in the cover engages in the slot in the tank opening.
  8. Fig 2: Removing/Installing Cover Retainer Lock Ring
    GM1372244Courtesy of GENERAL MOTORS CORP.
  9. Install the cover retainer lock ring. Use the half-inch breaker bar with J 45722  and rotate the retainer in a clockwise direction until the tangs are engaged. See Special Tools and Equipment .
  10. Fig 3: View Of Modular Fuel Pump & Sender Assembly Ground Terminal
    GM1372276Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  11. Install the fuel tank wiring harness, and the flanged nut securing the modular fuel pump and sender assembly ground terminal to the fuel tank flange stud.

    Tighten:  Tighten the flange nut to 7 N.m (62 lb in).

  12. Fig 4: Locating Fuel Tank Pressure Sensor Connector, Fuel Pump Connector & EVAP Vapor Hose Quick-Connector
    GM1372275Courtesy of GENERAL MOTORS CORP.
  13. Install the fuel tank pressure sensor connector (1), the fuel pump connector (2), and the EVAP vapor hose quick connector (3) to the modular fuel pump and sender assembly cover (4).
  14. Install the fuel tank assembly. Refer to Fuel Tank Replacement .