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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 973 (Engine Controls - 4.8L, 5.3L, & 6.0L (Introduction)) >> Repair Instructions >> Fuel Hose/Pipes Replacement - Chassis (1500 Crew Cab) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: Clean the fuel and evaporative emission (EVAP) connections and surrounding areas prior to disconnecting the fittings in order to avoid possible system contamination.
  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure .
  2. Disconnect the fuel feed line (1) fitting at the engine. Refer to Quick Connect Fitting(s) Service (Metal Collar) .
  3. Disconnect the EVAP canister purge tube (2) fitting. Refer to Quick Connect Fitting(s) Service (Plastic Collar) .
    4. Fig 1: Identifying Fuel Feed & EVAP Pipes
    GM1238585Courtesy of GENERAL MOTORS CORP.
  4. Cap the fuel rail and EVAP lines in order to avoid possible system contamination.
  5. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  6. Remove the fuel pipe bracket nut.
  7. Remove the fuel pipe bracket from the bellhousing stud.
    8. Fig 2: View Of Fuel Pipe Bracket & Nut At Bellhousing
    GM1238747Courtesy of GENERAL MOTORS CORP.
  8. Remove the heated oxygen (HO2S) sensor connector from the bracket.
  9. Remove the fuel line clip from the bracket on the transmission.
    10. Fig 3: Fuel Line Clip At Bracket On Transmission
    GM1549620Courtesy of GENERAL MOTORS CORP.
  10. Remove the fuel line clip from the bracket on the transfer case, if equipped with 4 wheel drive (4WD).
  11. Remove the clip from the bracket on the frame.
  12. Remove the transfer case harness from the clip bracket.
    13. IMPORTANT: The area around the electro-hydraulic control unit (EHCU) MUST be free from loose dirt to prevent contamination of disassembled anti-lock brake (ABS) components.
  13. Thoroughly wash all contaminants from around the EHCU.
  14. Disconnect the chassis electrical harness connectors from the electronic brake control module (EBCM).
    15. Fig 4: Identifying Chassis Electrical Connectors To EBCM
    GM924296Courtesy of GENERAL MOTORS CORP.
  15. Disconnect the brake lines from the brake pressure modulator valve (BPMV).
  16. Remove the bolts (4) attaching the EHCU bracket to the frame (5).
  17. Remove the EHCU (1).
    18. Fig 5: View Of EBCM/EHCU Assembly
    GM379478Courtesy of GENERAL MOTORS CORP.
  18. Remove the torsion bar bracket, if equipped with 4WD. Refer to Torsion Bar Replacement in Front Suspension.
  19. Remove the EVAP canister. Refer to Evaporative Emission (EVAP) Canister Replacement (Pickup)  or Evaporative Emission (EVAP) Canister Replacement (Pickup - 5.3L (L59) Engine)  or Evaporative Emission (EVAP) Canister Replacement (1500 Crew Cab)  or Evaporative Emission (EVAP) Canister Replacement (Cab/Chassis) .
  20. Disconnect the fuel line at the tank. Refer to Quick Connect Fitting(s) Service (Plastic Collar) .
  21. Cap the fuel and EVAP lines in order to avoid possible system contamination.
  22. Remove the fuel/EVAP bundle clip nuts.
  23. Remove the fuel/EVAP bundle.
    24. Fig 6: Fuel/EVAP Bundle & Clip Nuts (1500 Crew Cab)
    GM1223779Courtesy of GENERAL MOTORS CORP.
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