GM 15076931
Water Pump

You need to empty your cooling system before starting work on 4.8l 5.3l and 6.0l water pumps. Take both air cleaner outlet clamps loose from their positions on the Throttle Body and maf sensor before removing the outlet duct. Take off the engine sight shield and radiator vent opening hose when needed from their clips. Move the inlet hose clamp from its position at the Water Pump before extracting the inlet hose and next removing the Fan Blade and accessory Drive Belt. Move the outlet hose clamp and take off the outlet hose along with the surge tank outlet hose clamp and surge tank outlet hose from the Water Pump. Secure the heater inlet hose clamp to an improved position then extract both the heater inlet hose and Water Pump bolts with their gaskets while throwing away the gaskets. Install new gaskets on the Water Pump before placing it onto clean gasket surfaces. Fasten the Water Pump bolts at first to 15 nm (11 ft. Lbs.) and then to 30 nm (22 ft. Lbs.). Relay the heater inlet hose under its clamp before connecting the surge tank outlet hose and its clamp with the outlet hose using its clamp and attaching the accessory Drive Belt. Begin with engine vent inlet hose installation into radiator hose clips and set the inlet hose with its clamp. Secrete the Fan Blade onto its hub before adding the outlet hose and its clamp to the intake hose. Also set the engine sight shield if needed and line the arrow on the Throttle Body end of the duct with the Throttle Body stud to add the air cleaner outlet duct. Use the radiator inlet hose clip to secure its end at the outlet duct before you adjust the air cleaner outlet clamps to 7 nm (62 inch lbs.) while mounting them to the Throttle Body and maf/iat sensor.

Ensure all gasket surfaces are free of oil or foreign material.

45 Nm (33 ft. lbs.).

Reattach the radiator outlet hose to both the water pump and surge tank, repositioning the clamps accordingly.

The air cleaner outlet duct clamp to 4 Nm (35 inch lbs.).

Reposition the rear heater inlet hose clamp and remove the rear heater inlet hose from the auxiliary water pump.

Loosen the air cleaner outlet duct clamps at the throttle body and MAF/IAT sensor, then remove the radiator inlet hose clip and the air cleaner outlet duct.

Remove the water pump bolts and take out the water pump along with the gaskets, discarding the gaskets.

If needed, remove the engine sight shield and the radiator vent inlet hose from the radiator hose clips.

Reposition the radiator inlet hose clamp at the water pump and remove the radiator inlet hose.

Align the hinge clip with the throttle body lip and pivot the air cleaner outlet duct downward.

Reinstall the bypass hose and position the bypass hose clamps at the water pump and water crossover.

Remove the clips from the auxiliary water pump bracket and then remove the auxiliary water pump from the bracket.

Install the inlet hose and its clamp, then the engine vent inlet hose to the radiator hose clips. If necessary, reinstall the engine sight shield, ensuring to align the arrow at the throttle body end of the duct with the throttle body attaching stud before installing the air cleaner outlet duct.