GMC R3500 Cooling Fan Relay Replacement at your home or office.

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Cooling Fan Relay Replacement Service

How much does a Cooling Fan Relay Replacement cost?

On average, the cost for a GMC R3500 Cooling Fan Relay Replacement is $109 with $14 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1987 GMC R3500L6-4.8LService typeCooling Fan Relay ReplacementEstimate$143.75Shop/Dealer Price$160.94 - $190.01
1991 GMC R3500V8-6.2L DieselService typeCooling Fan Relay ReplacementEstimate$145.35Shop/Dealer Price$167.96 - $213.24
1989 GMC R3500V8-6.2L DieselService typeCooling Fan Relay ReplacementEstimate$145.35Shop/Dealer Price$167.96 - $213.24
1989 GMC R3500V8-7.4LService typeCooling Fan Relay ReplacementEstimate$150.15Shop/Dealer Price$173.94 - $222.80
1987 GMC R3500V8-7.4LService typeCooling Fan Relay ReplacementEstimate$123.75Shop/Dealer Price$140.97 - $170.07
1991 GMC R3500V8-5.7LService typeCooling Fan Relay ReplacementEstimate$145.35Shop/Dealer Price$167.96 - $213.24
1989 GMC R3500V8-5.7LService typeCooling Fan Relay ReplacementEstimate$150.35Shop/Dealer Price$172.82 - $218.00
1987 GMC R3500V8-5.7LService typeCooling Fan Relay ReplacementEstimate$128.75Shop/Dealer Price$146.19 - $175.46
Show example GMC R3500 Cooling Fan Relay Replacement prices

What is the Cooling Fan Relay all about?

Modern vehicles employ electric cooling fans to draw air into the engine compartment, through the radiator, and into the air conditioning condenser. This action removes heat from the coolant in the radiator and pulls heat from the refrigerant in the air conditioning condenser. The electric cooling fan is an electric motor with fan blades attached to it. It turns on when the powertrain control module receives a signal that the temperature of the engine or air conditioning warrants the extra flow of air.

The powertrain control module then sends a signal for the cooling fan relay to supply power to the cooling fan. The fan motor relay performs the action of a switch, sending 12-volt power to the cooling fan and initiating its operation. Once the engine temperature drops below the threshold programmed into the powertrain control module, the cooling fan turns off. In some makes and models, the cooling fan can continue running after the engine has been shut off, or it can turn on while the ignition is off. If the cooling fan relay is faulty, the cooling fan can continue to run unnecessarily, even when the ignition is off and the engine is cold. Conversely, the cooling fan may not run at all causing the engine to overheat. Since the cooling fan plays a factor in air conditioning performance, your air conditioning may not blow cold air.

Keep in mind:

  • The cooling fan can run even with the ignition off. Use caution when working in and around the cooling fan to prevent personal injury.
  • Some vehicles are equipped with two cooling fans, with separate cooling fan relays controlling each one.

How it's done:

  • The Cooling Fan Relay is verified that it needs to be replaced. The main access relay panel is open to access the cooling fan relay.

  • The defective Cooling Fan Relay is removed from the relay box by pulling straight up and out of the connection.

  • The connection is checked for any damage or overheating. The new Cooling Fan Relay is installed by lining up the pins and pressing it into the connection.

  • The Cooling Fan Relay is tested for operation by running the engine or turning on the A/C.

  • The vehicle is tested for proper operation of the Cooling Fan during a road test.

Our recommendation:

The cooling fan relay is meant to last indefinitely, but as with all electrical components, it can fail prematurely. There are no preventative measures you can take against its failure. If your engine temperature rises into the red zone, or if the cooling fan won’t quit operating, have one of our expert technicians diagnose the problem and replace the cooling fan relay if required.

What common symptoms indicate you may need to replace the Cooling Fan Relay?

  • Engine temperature runs higher than normal or overheats
  • Air-conditioning does not function
  • Cooling fan continues to run indefinitely

How important is this service?

The electric cooling fan plays an important role to control engine temperature. In a situation where the cooling fan will not turn on, overheating and engine damage can occur. If the cooling fan runs continuously, the fan motor can burn out or electrical drain can deplete your battery. If the cooling fan relay is faulty, have it replaced as soon as possible to prevent additional, expensive repairs.

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Tomas

17 years of experience
226 reviews
Tomas
17 years of experience
GMC R3500 V8-5.7L - Brake System Inspection - Newark, New Jersey
Pretty good. My inspection for my brakes went very quick, (a little too quick.) Not the most thorough inspection. However, Tomas came to the same conclusion that I had already suspected and the problem is now "dually" analyzed. 15 minutes, and I'm good. Tomas was quite knowledgeable and polite. He came with the proper tools and equipment to say the least and was promptly on time for the booked appointment. I would consider requesting Tomas again for similar work. Thanks again to Tomas and the team at YourMechanic for helping out.

Michael

25 years of experience
187 reviews
Michael
25 years of experience
GMC Envoy L6-4.2L - Control Arm Assembly Replacement (Front Lower Left, Front Lower Right) - Las Vegas, Nevada
Michael did a great job. On time and knew what he was doing.

Andrew

15 years of experience
521 reviews
Andrew
15 years of experience
GMC K1500 Suburban V8-5.7L - Fuel Filter - Portland, Oregon
On time, very polite, and is one of the few mechanics who I felt actually listened to what I thought the problem was! I don't really want any other mechanic anymore

Rodney

36 years of experience
547 reviews
Rodney
36 years of experience
GMC Envoy L6-4.2L - Car is slow to accelerate - Sacramento, California
Great service thanks

Excellent Rating

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Rating Summary
2,807
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2,807
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