GM 21999769 Blade,Engine Cooling Fan

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If the relays are not the issue, the wiring and connections to the fan motor should be inspected.

To remove the fan assembly, start by disconnecting the cable from the negative battery terminal. Then, raise the vehicle and support it securely on jackstands. Remove the splash shield and drain the cooling system. Detach the upper radiator hose from the radiator and position it aside. Remove the air filter housing and intake duct/resonator. On ZL1 models, unclip the air deflector from the top of the fan shroud. Disconnect and plug the coolant overflow hose from the radiator filler neck. On V6 and non-supercharged VB engines, disconnect the upper radiator hose clamps and remove the hose. On supercharged VB engines, disconnect the charge air cooler hoses from the fan shroud. Slightly reposition the transmission cooler lines without disconnecting them, if equipped. Disconnect the fan harness electrical connector and detach the wire harness clips from the fan shroud. Remove the fan shroud-to-radiator mounting bolts and lift the fan/shroud assembly from the vehicle without damaging the radiator cooling fins.