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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Controls - 6.6L - Introduction (2 Of 2)) >> Repair Instructions >> Fuel Sender Assembly Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Remove the fuel tank. Refer to Fuel Tank Replacement (Pickup)  or Fuel Tank Replacement (Cab/Chassis - Front)  or Fuel Tank Replacement (Cab/Chassis - Rear) .
  2. Disconnect the fuel lines from the sending unit. Refer to Quick Connect Fitting(s) Service (Metal Collar)  or Quick Connect Fitting(s) Service (Plastic Collar) .
  3. 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.
    Fig 1: Identifying Lock Ring
    GM1642096Courtesy of GENERAL MOTORS CORP.
  4. Use the J 45722  and a long breaker-bar in order to unlock the fuel sender lock ring.
  5. Fig 2: View Of Sending Unit And Seal
    GM1488784Courtesy of GENERAL MOTORS CORP.
  6. Remove the sending unit and seal. Discard the seal.
  7. Clean the sending unit sealing surfaces.
  8. 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.
    IMPORTANT: Inspect the lock ring for damage due to improper removal or installation procedures. If damage is found, install a NEW lock ring.
    IMPORTANT: Check the lock ring for flatness.
    Fig 3: Checking Lock Ring For Flatness
    GM1617750Courtesy of GENERAL MOTORS CORP.
  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.