Automotive Parts [Lifetime Warranty] 973-407 Front HVAC Fan Blower Motor Resistor
973-407 HVAC blower motor resistor with wiring harness and connector assembly.
973-407 HVAC blower motor resistor with wiring harness for car AC repair.
973-407 front HVAC blower motor resistor with wiring harness and connector plug.
973-407 HVAC blower motor resistor shown with car dashboard and air vent to illustrate temperature control.
973-407 HVAC blower motor resistor kit with wiring harness and connector close-up views.
Hands using an AC manifold gauge set to install a 973-407 HVAC blower motor resistor in a vehicle engine bay.
BlueStars promotional image for 973-407 front HVAC fan blower motor resistor featuring a family in a car.
973-407 HVAC blower motor resistor with wiring harness and connector assembly.
973-407 HVAC blower motor resistor with wiring harness for car AC repair.
973-407 front HVAC blower motor resistor with wiring harness and connector plug.
973-407 HVAC blower motor resistor shown with car dashboard and air vent to illustrate temperature control.
973-407 HVAC blower motor resistor kit with wiring harness and connector close-up views.
Hands using an AC manifold gauge set to install a 973-407 HVAC blower motor resistor in a vehicle engine bay.
BlueStars promotional image for 973-407 front HVAC fan blower motor resistor featuring a family in a car.
Lifetime Warranty

[Lifetime Warranty] 973-407 Front HVAC Fan Blower Motor Resistor

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973-407 Front HVAC Fan Blower Motor Resistor

Key Features

  • Direct-fit replacement for the original equipment blower motor resistor.
  • Restores the function of variable fan speeds for your vehicle's front HVAC system.
  • Kit includes a new resistor and a wiring harness pigtail to repair melted or corroded connectors.
  • Engineered to match the performance and fit of the original component.
  • Package contains: 1 resistor, 1 wiring harness, and butt connectors for splicing.

Replaces / Cross-Reference Part Numbers

  • Dorman: 973-407
  • OE: 89018778
  • OE: 89019351
  • OE: 1581638
  • OE: 93803636

Compatibility & Fitment

  • Fits select Chevrolet and GMC truck and van models.
  • Chevrolet Express 1500, 2500, 3500
  • Chevrolet C4500, C5500, C6500, C7500 Kodiak
  • GMC Savana 1500, 2500, 3500
  • GMC C4500, C5500, C6500, C7500 Topkick

When to Replace

  • HVAC fan only operates on the highest speed setting.
  • Fan speed is uncontrollable or stuck on one speed.
  • No air blows from the vents at any fan speed.
  • Visible burn marks, corrosion, or melting on the original resistor or its electrical connector.

Installation Tips

  • Disconnect the vehicle's battery before beginning installation.
  • The resistor is typically located in the HVAC ductwork behind the glove box or on the passenger side of the lower dashboard.
  • Inspect the original wiring connector for heat damage or corrosion; use the included pigtail harness for repair if needed.
  • Ensure a secure connection when splicing the new harness to prevent overheating and future failure.
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  • Check your OE part

    Check your OE part

    Please double-check both the number & picture of your OE Resistor and your vehicle model carefully before purchasing!
  • Premium Materials

    Premium Materials

    Made of robust & durable materials that prevent cracking and failing, ensuring excellent degradation resistance for long-lasting performance
  • Saving Solution

    Saving Solution

    Great feeling when your vehicle's AC system works efficiently - Enjoy worthy savings by replacing the superior yet affordable part yourself!
  • Fixing AC Symptoms

    Fixing AC Symptoms

    Stuck on one speed | Does not work on specific/all settings | Does not blow air | Inconsistent fan speed | No air coming from vents
4 SIMPLE STEPS

4 SIMPLE STEPS

1. Access to your resistor (usually behind/ under the glove box); 2. Release the 2 screws that secure the resistor. Unplug the resistor connector and the resistor plug; 3. Disconnect the vehicle’s negative battery cable. Replace the old wire harness by cutting the wires and matching them to the new wire harness (take note of where each wire goes); 4. Reinstall with the new resistor. You can put some dielectric grease on in the resistor connector housing to avoid water intrusion.
Brand Model Number
Replaces OE part number #973-407, 1580560, 22941007, 3A1041, 8229410070, 8890187700, 89018770, DR780, RU1274, RU1508, RU51, RU581, RU819, RU869
Isuzu 2005-2008 Isuzu HTR || 2005-2008 Isuzu HVR || 2006 Isuzu HXR
Chevrolet Kodiak 2003-2009 Chevy C4500 Kodiak || 2003-2009 Chevy C5500 Kodiak || 2003-2009 Chevy C6500 Kodiak || 2003-2009 Chevy C7500 Kodiak || 2003-2009 Chevy C8500 || 2003-2009 Chevy C8500 Kodiak
Chevrolet Express 1996-2014 Chevy Express 1500 || 1996-2011 Chevy Express 2500 || 1996-2011 Chevy Express 3500 || 2009-2011 Chevy Express 4500 || 2009-2019 Chevy Express Cargo (Mexico) || 2009-2019 Chevy Express Pasajeros (Mexico)
GMC Topkick 2003-2009 GMC C4500 Topkick || 2004-2009 GMC C5500 Topkick || 2004-2009 GMC C6500 Topkick || 2004-2009 GMC C7500 Topkick || 2004-2009 GMC C8500 || 2004-2009 GMC C8500 Topkick
GMC Savana 1996-2014 GMC Savana 1500 || 1996-2019 GMC Savana 2500 || 1996-2019 GMC Savana 3500 || 2009-2019 GMC Savana 4500

FAQ

This part is compatible with a wide range of Chevrolet, GMC, and Isuzu models, including the Chevrolet Express (1500, 2500, 3500, 4500) and GMC Savana (1500, 2500, 3500, 4500) produced between 1996 and 2019. It also fits 2003–2009 Chevrolet Kodiak and GMC Topkick (C4500, C5500, C6500, C7500, C8500) models, as well as 2005–2008 Isuzu HTR and HVR trucks.
This resistor kit serves as a direct replacement for several OEM part numbers, including 1580560, 22941007, 89018770, and 3A1041.
The most common sign of a failing resistor is when your HVAC fan only works on the highest speed setting, or stops working entirely on lower speeds. You may also notice intermittent fan operation or a burning smell coming from the vents, which often indicates that the resistor or the wiring harness has overheated or suffered from corrosion.
Yes, this kit includes both the blower motor resistor and the necessary wiring harness pigtail. Replacing the harness along with the resistor is highly recommended, as the original connector is often damaged or melted due to the same heat buildup that caused the resistor to fail.
Installation is generally straightforward and can typically be completed in under an hour. You will primarily need basic hand tools, such as a screwdriver or socket set, to access the blower motor housing under the passenger side dashboard. Because this kit includes the pigtail, you will need to perform a simple wire splice to connect the new harness.
Blower motor resistors fail primarily due to excessive heat buildup. Over time, the electrical resistance causes the component to get very hot; if the blower motor itself is drawing too much current due to age or debris, or if the cabin air filter is restricted, the heat cannot dissipate properly, leading to the failure of the resistor and the melting of the electrical connector.