Replace an overheated or corroded front blower motor speed resistor with the Dorman hvac blower motor resistor kit, part number 973-409, which pairs a new resistor with a harness pigtail to help your HVAC fan run through its speed settings. It fits many vehicles, among them the 1999-2006 Chevrolet Silverado 1500, 1999-2006 Chevrolet Silverado 2500 and 1999-2006 GMC Sierra 1500. See the "Vehicles it fits" section for the full list and engine details.
Dorman built this resistor and harness kit for original equipment resistors that have overheated or corroded. Most repairs call for a harness pigtail, so one ships with the resistor.
- Direct replacement: the resistor and harness kit is designed to directly replace the original equipment on the listed applications.
- Resistor plus pigtail: every kit includes both a resistor and a harness pigtail.
- OE-like performance: made to perform like the original equipment. If a failed resistor is the cause, it is intended to return full HVAC operation.
- Engineering support: backed by Dorman's team of engineers and quality specialists in the USA.
Signs this Dorman blower motor resistor may need replacing include a blower that works only on some speed settings or not at all, and a burnt or corroded connector at the resistor. Those symptoms can have other causes, so diagnose the blower circuit before replacing parts.
Interchange: 3A1042 · RU1064 · 20293 · 12125635 · 15305077 · 15862656 · 22807122 · 88953358 · 89018597 · 89019089 · RU371 · RU371T · GM0613203 · DR775
This part cross-references / interchanges with the following part numbers:
3A1042, RU1064, 20293, 12125635, 15305077, 15862656, 22807122, 88953358, 89018597, 89019089, RU371, RU371T, GM0613203, DR775
Frequently Asked Questions
What comes in the Dorman blower motor resistor kit?
Each 973-409 kit includes a blower motor speed resistor and a harness pigtail, so you can replace the resistor and its connector together.
Which vehicles does part 973-409 fit?
It fits many vehicles, including the 1999-2006 Chevrolet Silverado 1500, 1999-2006 Chevrolet Silverado 2500 and 1999-2006 GMC Sierra 1500. Check the "Vehicles it fits" section for your exact vehicle.
What does a blower motor resistor do?
It controls the current sent to the front blower motor so the HVAC fan can run at different speed settings.
What are signs the blower motor resistor may need replacing?
Common signs are a fan that runs only on certain settings or not at all, or a burnt or corroded connector. These can have other causes, so diagnose the circuit first.
Is this a direct replacement for the original resistor?
Yes. Dorman designed this resistor and harness kit to directly replace the original equipment on the listed applications. Follow the vehicle service information for installation.
