Download 2005 Chevy Pickup 5.3 Water Pump Removal & Installation – Instructions a. Park the vehicle and apply the parking brake. Support the front of the truck in the air with jack stands and lift the hood. Rotate the radiator cap to the vent position and then remove it. Drain the coolant into the drain pan from the drain cock on the passenger side corner of the radiator; it opens counterclockwise. Close the drain cock. Remove the jack stands and lower the vehicle to the ground. b. Loosen the clamps for the air intake hose at the throttle body and MAF sensor and remove the intake tube. Remove the clips securing the engine harness to the PCM cover. Remove the TCM mounting bolts and remove the TCM from the fan shroud. Loosen the bolts securing the harness to the control module and set the TCM aside. Remove the fan shroud retainers and the lower mounting bolts. Remove the upper fan shroud from the vehicle. c. Loosen the clamp and remove the inlet hose from the water pump. Position the hose aside. If you have a mechanical fan, remove it and the clutch as a unit from the water pump with the fan clutch tool set.