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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1137 (Engine Controls And Fuel - 3.6L - Introduction (2 Of 2)) >> Repair Instructions >> Fuel Pump Replacement (LLT) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Before continuing, lubricate the cylinder head bore with clean engine oil, GM P/N 12345610 (Canadian P/N 993193) or equivalent.
  2. GM4259220Courtesy of GENERAL MOTORS CORP.
    NOTE:
    • The camshaft MUST be at the base circle position before the fuel pump is installed.
    • At the base circle position, the EN-48896  alignment gauge will sit flush with the cylinder head.

    Install the EN-48896  alignment gauge (1) and turn the crankshaft until the camshaft lobe is at the base circle position.

  3. Remove the EN-48896  alignment gauge (1).
    4. Fig 1: High Pressure Fuel Pump Components
    GM2221135Courtesy of GENERAL MOTORS CORP.
    CAUTION: This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.
    NOTE:
    • ALWAYS make sure the fuel pump bolt retainers are present before installing the fuel pump bolts.
    • If ANY fuel pump bolt retainers are missing or NOT suitable for reuse, replace the retainers as necessary.
  4. Lubricate the NEW fuel pump housing seal (3) with clean engine oil, GM P/N 12345610 (Canadian P/N 993193) or equivalent, and install it on the fuel pump.
  5. Install the NEW fuel pump bolts (1) and NEW fuel pump bracket gasket (4) to the fuel pump (2).
  6. Lubricate the valve lifter follower (5) with clean engine oil, GM P/N 12345610 (Canadian P/N 993193) or equivalent, and install it into the cylinder head bore.
  7. Install the fuel pump assembly (2) into the cylinder head and start the NEW fuel pump bolts (1) by hand.
    NOTE: Refer to Fastener Notice .
    CAUTION: Alternately hand-tighten the fuel pump bolts one turn at a time until the pump is fully seated. Trying to draw down the pump without even side-to-side tightening may result in pump plunger damage.
  8. Tighten the NEW fuel pump bolts (1) to 15 N.m (11 lb ft)  .
  9. Connect the electrical connector to the fuel pump.
  10. Install a NEW fuel feed intermediate pipe. Refer to Fuel Feed Intermediate Pipe Replacement (LLT) 
  11. Install a NEW fuel feed pipe. Refer to Fuel Feed Pipe Replacement (LLT) .
  12. Inspect for leaks using the following procedure:
    1. Turn ON the ignition with the engine OFF for 2 seconds.
    2. Turn OFF the ignition for 10 seconds.
    3. Turn ON the ignition with engine OFF.
    4. Inspect for fuel leaks.
  13. Install the fuel pipe shield. Fuel Pipe Shield Replacement (LLT) 
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