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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 199 (Engine Control System & Fuel - 4.8L, 5.3L, 6.0L, Or 6.2L - Introduction (2 Of 2)) >> Repair Instructions >> Fuel Tank Fuel Pump Module Replacement (1500 SWB - 98.4L (26 gal) Tank + E85) >> Removal Procedure

Removal Procedure

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    Fig 1: View of Special Tool & Lock Ring
    GM1704934Courtesy of GENERAL MOTORS CORP.
  1. Remove the fuel tank. Refer to Fuel Tank Replacement (1500 SWB - 98.4L (26 gal) Tank)  or Fuel Tank Replacement (1500 LWB - 117.3L (31 gal) Tank)  or Fuel Tank Replacement (1500 SWB - 98.4L (26 gal) Tank + E85)  or Fuel Tank Replacement (1500 LWB - 117.3L (31 gal) Tank + E85)  or Fuel Tank Replacement (2500 LWB - 98.4L (26 gal) Tank-Front)  or Fuel Tank Replacement (2500 LWB - 43.5L (11.5 gal) Tank-Rear) .
  2. Disconnect fuel and evaporative emission (EVAP) lines from the fuel tank module. Refer to Plastic Collar Quick Connect Fitting Service .
  3. Disconnect the EVAP vent valve line quick connect fitting at the vent valve and reposition the line out of the way. Refer to Plastic Collar Quick Connect Fitting Service .
    4. NOTE: Avoid damaging the lock ring. Use only J-45722 to prevent damage to the lock ring.
    NOTE: Do Not handle the fuel sender assembly by the fuel pipes. The amount of leverage generated by handling the fuel pipes could damage the joints.
    IMPORTANT: Do NOT use impact tools. Significant force will be required to release the lock ring. The use of a hammer and screwdriver is not recommended. Secure the fuel tank in order to prevent fuel tank rotation.
  4. Using the J 45722  and a long breaker bar, rotate the ring clockwise unlocking the fuel tank module lock ring. See Special Tools .
  5. Remove the lock ring.
    6. Fig 2: View Of Fuel Tank Module & Quick Connect Fitting
    GM1704935Courtesy of GENERAL MOTORS CORP.
  6. Carefully lift the module from the fuel tank enough to access the quick connect fitting (1) under the module cover. Disconnect the quick connect fitting. Refer to Plastic Collar Quick Connect Fitting Service .
  7. Remove the fuel tank module.
  8. Remove and discard the fuel tank module seal.
    9. Fig 3: Checking Lock Ring For Flatness
    GM1617750Courtesy of GENERAL MOTORS CORP.
    IMPORTANT:
    • Some lock rings were manufactured with "DO NOT REUSE" stamped into them. These lock rings may be reused if they are not damaged or warped.
    • Inspect the lock ring for damage due to improper removal or installation procedures. If damage is found, install a NEW lock ring.
    • Check the lock ring for flatness.
  9. Place the lock ring on a flat surface. Measure the clearance between the lock ring and the flat surface using a feeler gage at 7 points.
  10. If warpage is less than 0.41 mm (0.016 in), the lock ring does not require replacement.
  11. If warpage is greater than 0.41 mm (0.016 in), the lock ring must be replaced.
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