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Home › Pontiac › 2001 › Aztek Base, AWD › Repair and Diagnosis › External Pages › Different car › Section 943 (Engine Controls - 6.6L (Lb7) (Introduction)) › Repair Instructions › Fuel Injector Replacement › Installation Procedure

Installation 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.
  1. If the fuel injector sleeve was pulled from the cylinder head when removing the injector(s), refer to Fuel Injector Sleeve Replacement in Engine Mechanical - 6.6L.
  2. Install a NEW O-ring onto the fuel injector(s).
  3. Lubricate the O-ring with clean engine oil.
  4. Install a NEW copper washer into the fuel injector bore in the cylinder head.
  5. Install the fuel injector with injector bracket.
    6. NOTE: Refer to Fastener Notice in Cautions and Notices.
  6. Install the injector bracket bolt.

    Tighten:  Tighten the bolt to 50 N.m (37 lb ft).

    7. Fig 1: View Of Fuel Injectors, Brackets & Injector Locating Pins
    GM660480Courtesy of GENERAL MOTORS CORP.
  7. Install the return pipe assembly.
  8. Install the fuel injector return line to injector eye bolts and washers. Lubricate the washers with diesel fuel prior to installing.

    Tighten:  Tighten the fuel injector line to injector eye bolts to 16 N.m (12 lb ft).

  9. Install the fuel injector return line to cylinder head eye bolts and washers. Lubricate the washers with diesel fuel prior to installing.

    Tighten:  Tighten the fuel injector return line to cylinder head eye bolts to 17 N.m (12 lb ft).

    10. Fig 2: View Of Fuel Injector Return Pipe
    GM660477Courtesy of GENERAL MOTORS CORP.
  10. Install the lower valve cover. Refer to Valve Rocker Arm Cover Replacement - Lower Left or Valve Rocker Arm Cover Replacement - Lower Right in Engine Mechanical - 6.6L.
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