Engine Cooling Fan: Removal & Installation Chevrolet Pickup C3500

Cooling Fan Relay (Removal & Installation)

1. Disconnect negative battery cable.
2. Disconnect wiring harness connector. (Scheme 2)
3. Remove the relay from the inner fender.
4. To install, reverse removal procedure.

Coolant Temperature Sensor (Removal & Installation)

1. Disconnect negative battery cable.
2. Disconnect wiring harness connector. (Scheme 2)
3. Using socket, remove coolant temperature sensor. (Scheme 2)
4. To install, reverse removal procedure. Tighten sensor to 17 ft. lbs (23 N.m). Add necessary coolant to fill system.

Auxiliary Coolant Fan (Removal & Installation)

Note. A removal & installation procedure is not provided by manufacturer. (Scheme 2)

Scheme 2

Coolant Fan Relay (Removal & Installation)

1. Disconnect negative battery cable.
2. Disconnect wiring harness connector. (Scheme 3)
3. Remove relay retaining screws and remove relay from cowl panel. (Scheme 3)
4. To install, reverse removal procedure.

1. Disconnect negative battery cable.
2. Disconnect wiring harness connector. (Scheme 3)
3. Using socket, remove coolant temperature sensor. (Scheme 3)
4. To install, reverse removal procedure. Tighten sensor to 17 ft. lbs (23 N.m). Add necessary coolant to fill system.

1. Disconnect negative battery cable.
2. Remove the grille assembly.
3. Disconnect wiring harness connector. (Scheme 3)
4. Remove the bolts and nuts for the auxiliary fan assembly, and remove fan.
5. To install, reverse removal procedure. Tighten nuts to 115 INCH lbs. (13 N.m). Tighten bolts to 42 INCH lbs. (4.7 N.m).

Scheme 3

Cooling Fan Circuit Wiring Diagram ("C" & "K" Series - 7.4L VIN N). Scheme 4

Cooling Fan Circuit Wiring Diagram ("G" Series - 7.4L VIN N). Scheme 5

Cooling Fan Circuit Wiring Diagram ("P" Series - 7.4L VIN N). Scheme 6