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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 148 (Engine Mechanical - 4.8L, 5.3L & 6.0L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Fuel Rail and Injectors Installation

Fuel Rail and Injectors Installation

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WARNING: The fuel rail stop bracket must be installed onto the engine assembly. The stop bracket serves as a protective shield for the fuel rail in the event of a vehicle frontal crash. If the fuel rail stop bracket is not installed and the vehicle is involved in a frontal crash, fuel could be sprayed possibly causing a fire and personal injury from burns.

Important:  DO NOT use the fuel injector O-ring seals again. Install NEW fuel injector O-ring seals during assembly.

  1. Lubricate the NEW fuel injector O-ring seals with clean engine oil.
  2. Install the O-ring seals onto the fuel injectors.
  3. Install a new O-ring seal to the right side of the crossover tube.
  4. Assemble the crossover tube and bolt to the right fuel rail.
  5. Install the fuel rail, with fuel injectors, into the intake manifold.

    Press evenly on both sides of the fuel rail until all of the injectors are seated in their bores.

  6. Apply a 5 mm (0.2 in) band of threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the threads of the fuel rail bolts. Refer to Sealers, Adhesives, and Lubricants .
    CAUTION: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
  7. Install the fuel rail bolts.

    Tighten 

    1. Tighten the fuel rail bolts to 10 N.m (89 lb in).
    2. Tighten the crossover tube right side retaining bolt to 3.8 N.m (34 lb in).
    Fig 1: Installing Fuel Rail With Fuel Injectors & Fuel Rail Bolts
    G02079070Courtesy of GENERAL MOTORS CORP.
  8. Install the fuel rail stop bracket and bolt.

    Tighten 

    Tighten the fuel rail stop bracket bolt to 50 N.m (37 lb ft).

    Fig 2: Installing Fuel Rail Stop Bracket & Bolt
    G02079071Courtesy of GENERAL MOTORS CORP.
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