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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 8 (Engine Controls And Fuel - 5.3L (L83) Or 6.2L (L86) - Repair Instructions) >> Repair Instructions >> Fuel Tank Fuel Pump Module Replacement (SWB) >> Removal Procedure

Removal Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Fuel Tank
    GM3638454Courtesy of GENERAL MOTORS COMPANY
  1. Remove the fuel tank. Refer to Fuel Tank Replacement .
  2. Disconnect fuel and evaporative emission (EVAP) lines (1) 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. CAUTION:

    Avoid damaging the lock ring. Use only J-45722 to prevent damage to the lock ring.

    CAUTION:

    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.

    NOTE:

    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  wrench and a long breaker bar, rotate the ring clockwise unlocking the fuel tank module lock ring.
  5. Remove the lock ring.
    6. Fig 2: View Of Fuel Tank Module & Quick Connect Fitting
    GM1704935Courtesy of GENERAL MOTORS COMPANY
  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 COMPANY
    NOTE:
    • 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 gauge 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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