GM 15127056 Blade, Fan

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The vehicles covered in this check are equipped with viscous fan clutches. For safety purposes, it is important to remove the key from the ignition switch. The check begins with a visual inspection, specifically inspecting the radiator fan blades for cracks or damage. Any fan that shows signs of either should be replaced. Next, wiggle the radiator fan blade from side to side and ensure that there is 1/4-inch or less play in the fan. If there is excessive play, the clutch should be replaced.

To remove the radiator fan from a vehicle's cooling system, start by partially draining the cooling system and removing the upper radiator hose. If the vehicle has a V8 engine, also remove the air filter housing. Next, unclip the air conditioning hoses from the fan shroud and remove the clips at the left and right junctures of the upper and lower fan shroud section. Pull the upper shroud from the clips at the side brackets. Finally, remove the fan clutch hub from the water pump by turning it counterclockwise. To install the fan, first unbolt it from the clutch if necessary and then tighten the fan-to-clutch bolts to the specified torque. Reverse the removal steps to complete the installation. Finally, check the coolant level and add more if needed to bring it to the appropriate level.

Start by partially draining the cooling system and removing the upper radiator hose. If the vehicle has a V8 engine, also remove the air filter housing.