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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Engine Controls - 4.3L - Introduction (2 Of 2)) >> Repair Instructions >> Evaporative Emission (EVAP) Hoses/Pipes Replacement - Engine/Chassis >> Installation Procedure

Installation Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Install the fuel and EVAP bundle.
    Fig 1: Installing Fuel & EVAP Bundle
    GM1238831Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Install the fuel and EVAP bundle clip nuts.

    Tighten:  Tighten the nuts to 12 N.m (106 lb in).

  3. Remove the caps from the fuel and EVAP lines at the fuel tank.
  4. Connect the fuel and EVAP quick connect fittings. Refer to Quick Connect Fitting(s) Service (Plastic Collar) .
    Fig 2: Fuel And EVAP Lines At The Fuel Tank
    GM1238591Courtesy of GENERAL MOTORS CORP.
  5. If equipped with 4WD, install the torsion bar bracket. Refer to Torsion Bar Replacement in Front Suspension.
  6. Install the EHCU (1).
    Fig 3: View Of EBCM/EHCU Assembly
    GM379478Courtesy of GENERAL MOTORS CORP.
  7. Install the bolts (4) attaching the EHCU bracket to the frame (5).

    Tighten:  Tighten the bolts to 25 N.m (18 lb ft).

  8. Connect the brake lines to the BPMV.

    Tighten:  Tighten the fittings to 25 N.m (18 lb ft).

  9. Connect the chassis electrical harness connectors to the EBCM.
    Fig 4: Identifying Chassis Electrical Connectors To EBCM
    GM924296Courtesy of GENERAL MOTORS CORP.
  10. Install the transfer case harness to the clip bracket.
  11. Install the clip to the bracket on the frame.
  12. If equipped with 4WD, install the fuel line clip to the bracket on the transfer case.
  13. Install the fuel line clips to the brackets on the transmission.
    Fig 5: Connecting Fuel Line Clip At Bracket On Transmission
    GM1549620Courtesy of GENERAL MOTORS CORP.
  14. Install the HO2S sensor connector to the bracket.
  15. Install the fuel pipe bracket to the bellhousing stud.
    Fig 6: View Of Fuel Pipe Bracket & Nut At Bellhousing
    GM1238747Courtesy of GENERAL MOTORS CORP.
  16. Install the fuel pipe bracket nut.

    Tighten:  Tighten the nut to 10 N.m (89 lb in).

  17. Lower the vehicle.
  18. Remove the caps from the engine fuel line (1) and EVAP line (3).
  19. Connect the EVAP line (3). Refer to Quick Connect Fitting(s) Service (Plastic Collar) .
    Fig 7: Connecting EVAP Line
    GM1528274Courtesy of GENERAL MOTORS CORP.
  20. Connect the chassis fuel feed line at the engine fuel line (1). Refer to Quick Connect Fitting(s) Service (Plastic Collar) .
  21. Install the fuel fill cap.
  22. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure (Single Battery) or Battery Negative Cable Disconnect/Connect Procedure (Auxiliary Battery) in Engine Electrical.
  23. Use the following procedure in order to inspect for leaks:
    1. Turn the ignition ON, with the engine OFF, for 2 seconds.
    2. Turn the ignition OFF for 10 seconds.
    3. Turn the ignition ON, with the engine OFF.
    4. Inspect for fuel leaks.
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