Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Installation Procedure
- Install the fuel injection pump to the block.
- Install the fuel injection pump bolts.
Tighten: Tighten the bolts to 21 N.m (15 lb ft).
- Install the hoses to fuel lines.
- Position the injection pump hose clamps at the fuel line.
- Install the center intake manifold. Refer to Intake Manifold Replacement - Center in Engine Mechanical - 6.6L (LLY).
- Install the inlet pipe.
- Connect the fuel rail inlet pipe to the injection pump and rail.
Tighten: Tighten the fittings to 41 N.m (30 lb ft).
- Connect the fuel balance pipe fitting to the right fuel rail.
Tighten: Tighten the fitting to 41 N.m (30 lb ft).
- Install the fuel balance pipe retainer bolts.
Tighten: Tighten the bolts to 10 N.m (89 lb in).
- Install the thermostat housing crossover. Refer to Thermostat Housing Crossover Replacement (6.6L (LB7) Engine) or Thermostat Housing Crossover Replacement (6.6L (LLY) Engine) in Engine Cooling.
- Install the generator bracket and bolts.
Tighten: Tighten the bolts to 46 N.m (34 lb ft).
- Install the generator. Refer to Generator Replacement (4.3L Engine) or Generator Replacement (4.8L, 5.3L, and 6.0L Engines) or Generator Replacement (6.6L (LB7) Engine) or Generator Replacement (6.6L (LLY) Engine) or Generator Replacement (8.1L Engine) in Engine Electrical.
- Install the drive belt tensioner and bolt.
Tighten: Tighten the bolt to 50 N.m (37 lb ft).
- Install the heater outlet hose bolt to the generator bracket
Tighten: Tighten the bolt to 21 N.m (15 lb ft).
- Install the oil level indicator tube bracket bolt.
Tighten: Tighten the bolt to 21 N.m (15 lb ft).
- Install the A/C compressor/power steering pump bracket and bolts.
Tighten: Tighten the bolt to 46 N.m (34 lb ft).
- Position the power steering pump, with the hoses attached, to the bracket.
- Install the power steering pump bracket rear bolts (1).
Tighten: Tighten the bolts to 50 N.m (37 lb ft).
- Position the A/C compressor, with the hoses attached, to the bracket.
- Install the A/C compressor bolts.
Tighten: Tighten the bolts to 50 N.m (37 lb ft).
- Connect the A/C cut out switch electrical connector.
- Connect the A/C compressor clutch electrical connector.
- Position the battery cables to the bracket.
- Install the battery cable junction block bolt to the power steering pump bracket.
Tighten: Tighten the bolts to 9 N.m (80 lb in).
- Install the fan. Refer to Fan Replacement in Engine Cooling.
- Install the fuel injection control module. Refer to Fuel Injection Control Module Replacement .
- Fill the cooling system. Refer to Draining and Filling Cooling System (with HP2) or Draining and Filling Cooling System (without HP2) in Engine Cooling.
- Install the air cleaner outlet duct. Refer to Crankcase Ventilation Hoses/Pipes Replacement .
- Connect 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.
- Install the intake manifold cover. Refer to Intake Manifold Cover Replacement in Engine Mechanical - 6.6L (LLY).
- Prime the fuel system. Refer to Fuel System Priming .
- Start the engine. If the engine stalls, repeat the above step.
- Once the engine starts, inspect for fuel leaks.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.