Radiator Inlet Hose Replacement 4.3 L Engine

1. Drain the cooling system. Refer to Cooling System Draining and Filling .
2. Separate the MAF/IAT sensor assembly and the air inlet tube by loosening the hose clamp.
3. Disconnect the PCV hose from the air cleaner outlet duct.



4. Remove the air inlet tube and resonator retaining wing nut.



5. Remove the air inlet tube and resonator from the throttle body by pivoting the air inlet tube and resonator upward until the hinge clip releases from the lip on the throttle body.



6. Remove the radiator inlet hose from the support.
7. Remove the radiator inlet hose from the radiator.



8. Remove the radiator inlet hose from the thermostat housing.
9. Remove the radiator inlet hose.

1. Install the radiator inlet hose to the thermostat housing.



2. Install the radiator inlet hose to the radiator.
3. Install the radiator inlet hose to the support.



4. Align the hinge clip with the lip on the throttle body.

Install the air inlet tube and resonator to the throttle body by pivoting the air inlet tube and resonator downward until the mounting stud is through the hole in the air inlet tube.





Notice: 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.

5. Install the resonator retaining wing nut.

Tighten
Tighten the resonator wing nut to 3 N·m (27 lb in).

6. Connect the PCV hose to the air cleaner outlet duct.



7. Connect the MAF/IAT sensor assembly harness connector.
8. Fill the cooling system. Refer to Cooling System Draining and Filling .
9. Inspect the cooling system for leaks.

Radiator Inlet Hose Replacement 4.8 L, 5.3 L, and 6.0 L Engines

1. Drain the cooling system. Refer to Cooling System Draining and Filling .
2. Loosen the air cleaner outlet duct clamps at the following locations:

•	Throttle body

•	Mass airflow/intake air temperature (MAF/IAT) sensor

3. Remove the radiator inlet hose clip from the outlet hose.
4. Remove the air cleaner outlet duct.
5. If necessary, remove the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement in Engine Mechanical - 4.8L, 5.3L, and 6.0L.



6. Remove the radiator vent inlet hose from the radiator inlet hose clips.



7. Reposition the inlet hose clamp at the radiator.
8. Remove the inlet hose clip from the fan shroud.
9. Remove the inlet hose from the radiator.



10. Reposition the inlet hose clamp at the water pump.
11. Remove the inlet hose from the water pump.

1. Install the inlet hose to the water pump.
2. Position the inlet hose clamp at the water pump.



3. Install the inlet hose to the radiator.
4. Position the inlet hose clamp at the radiator.
5. Install the inlet hose clip to the fan shroud.



6. Install the radiator vent inlet hose to the radiator inlet hose clips.
7. If necessary, install the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement in Engine Mechanical - 4.8L, 5.3L, and 6.0L.




Important: Align the arrow at the throttle body end of the duct with the throttle body attaching stud.

8. Install the air cleaner outlet duct.
9. Install the radiator inlet hose clip to the outlet duct.
10. Tighten the air cleaner outlet duct clamps at the following locations:

•	Throttle body

•	MAF/IAT sensor

Tighten
Tighten the air cleaner outlet duct clamp screws to 7 N·m (62 lb in).

11. Fill the cooling system. Refer to Cooling System Draining and Filling .

Radiator Inlet Hose Replacement 8.1 L Engine

Important: Most truck models use a spring-type hose clamp at the hose connections. When using this type of clamp, install the radiator hoses on dry, non-painted surfaces in order to ensure proper sealing. Reusing the spring-type clamps on aftermarket hoses is not recommended.

1. Drain the cooling system. Refer to Cooling System Draining and Filling .
2. Reposition the inlet hose clamp at the radiator.
3. Remove the inlet hose from the radiator.



4. Reposition the inlet hose clamp at the water crossover.
5. Remove the inlet hose from the water crossover.

1. Install the inlet hose to the water crossover.
2. Position the inlet hose clamp at the water crossover.



3. Install the inlet hose to the radiator.
4. Position the inlet hose clamp at the radiator.
5. Fill the cooling system. Refer to Cooling System Draining and Filling .

Radiator Inlet Hose Replacement 6.6 L Engine

1. Drain the engine coolant. Refer to Cooling System Draining and Filling .
2. Move the hose clamps back on the radiator inlet hose.
3. Remove the radiator inlet hose from the radiator.
4. Remove the radiator inlet hose from the water outlet tube.

1. Install the radiator inlet hose to the water outlet tube.
2. Install the radiator inlet hose to the radiator.
3. Install the hose clamps on the radiator outlet hose.
4. Fill the engine coolant. Refer to Cooling System Draining and Filling .