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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 974 (Engine Controls - 8.1L (Introduction)) >> Repair Instructions >> Fuel Hose/Pipes Replacement - Chassis (Pickup) >> 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 lines in order to avoid possible system contamination.
  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure .
    Fig 1: View Of Fuel Feed Pipe & EVAP Canister Purge Pipe
    GM1238587Courtesy of GENERAL MOTORS CORP.
  2. Disconnect the fuel feed line (1) at the engine. Refer to Quick Connect Fitting(s) Service (Metal Collar) .
  3. Disconnect the EVAP canister purge tube line (2). Refer to Quick Connect Fitting(s) Service (Plastic Collar) .
  4. Cap the fuel rail and EVAP lines in order to avoid possible system contamination.
  5. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
    6. Fig 2: View Of Fuel Pipe Bracket & Nut At Bellhousing
    GM1238747Courtesy of GENERAL MOTORS CORP.
  6. Remove the fuel pipe bracket nut.
  7. Remove the fuel pipe bracket from the bellhousing stud.
  8. Remove the heated oxygen sensor (HO2S) sensor connector from the bracket.
    9. Fig 3: Fuel Line Clip Bracket On Transmission
    GM1549622Courtesy of GENERAL MOTORS CORP.
  9. Remove the fuel line clip from the bracket on the transmission.
  10. If equipped with 4-wheel drive (4WD), remove the fuel line clip from the bracket on the transfer case.
  11. Remove the clip from the bracket on the frame.
  12. Remove the transfer case harness from the clip bracket.
    13. Fig 4: Identifying Chassis Electrical Connectors To EBCM
    GM924296Courtesy of GENERAL MOTORS CORP.
    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 5: View Of EBCM/EHCU Assembly
    GM379478Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Make sure the brake lines are tagged and kept in order for proper reassembly.
  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. If equipped with 4WD, remove the torsion bar bracket. Refer to Torsion Bar Replacement in Front Suspension.
  19. Disconnect the fuel and EVAP lines at the fuel tank. Refer to Quick Connect Fitting(s) Service (Plastic Collar) .
    Fig 6: Fuel And EVAP Lines At The Fuel Tank
    GM1238591Courtesy of GENERAL MOTORS CORP.
  20. Cap the fuel and EVAP lines at the fuel tank in order to avoid possible system contamination.
    21. Fig 7: Fuel And EVAP Bundle (Pickup)
    GM1228114Courtesy of GENERAL MOTORS CORP.
  21. Remove the fuel and EVAP bundle clip nuts.
  22. Remove the fuel and EVAP bundle.
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