How to Replace the Fan in a GMC Sierra

The GMC Sierra comes in a variety of models and with a gasoline or diesel engine. You may find one of two engine fans in your GMC Sierra: Either electrical or mechanical (belt-driven.) These steps apply to the GMC Sierra 1500 with gasoline engine and dual electric engine cooling fans and require only a wrench. A novice should be able to accomplish these steps comfortably within an hour.

Instructions

1

Disconnect and isolate the negative battery cable on your GMC Sierra so that there's no chance it will slip back into contact with the battery terminal. This step is vital because electric engine fans may switch on at any time, even with the engine turned off, unless the battery is disconnected.

2

Use your wrench to loosen the retaining bolts in the corners of the shroud (the rectangular box the fans sit in.) Remove the shroud and fans from the engine compartment.

3

Twist off the cooling fan blade retainers and remove both cooling fan blades.

4

Reinstall the new cooling fan blades and tighten the cooling fan blade retainers back into place. Make certain the retainers are firmly seated.

5

Replace the cooling fan and shroud into the engine compartment and tighten the bolts that hold it in place. Make sure all of the bolts are firmly fastened.

6

Reconnect the negative battery cable.