Keep your fan speeds under control with the Dorman hvac blower motor resistor kit, part number 973-508, a front blower motor resistor paired with a harness pigtail to replace an original equipment resistor that has overheated or corroded. It fits many vehicles, among them the 2003-2006 Chevrolet Silverado 1500, 2003-2006 GMC Sierra 1500 and 2003-2004 Chevrolet Silverado 2500. See the "Vehicles it fits" section for the full list.
- Direct replacement: designed to directly replace the original equipment resistor and harness on the listed applications.
- Complete kit: every kit pairs a resistor with a harness pigtail, a combination that most repairs call for.
- Performs like the original: made to work like original equipment, helping bring back full HVAC blower operation when the old resistor is the cause of the problem.
- Trustworthy quality: supported by Dorman's team of engineers and quality specialists in the USA.
The blower motor resistor controls the current sent to the blower motor so the fan can run at its different speed settings. Signs it may need replacing include a blower that works only on high, fan speeds that stop responding, or a melted or corroded connector. Because the blower motor or control switch can cause similar symptoms, diagnose the circuit before replacing parts. Since this Dorman blower motor resistor comes with a new pigtail, the connector side of the repair can be handled at the same time as the resistor.
Interchange: APBMR017 · BMR003 · BMR003N · 4P1516 · RU1321 · 20340 · 10325408 · 10356906 · 10397570 · 15827470 · 15827491 · 15850268 · 19260762 · 22754990 · 52495874 · 52497491 · 89018653 · 89018778 · 89018849 · 89018964 · 89019351 · 93803635 · 93803636 · RU359 · RU631 · JA1639
This part cross-references / interchanges with the following part numbers:
APBMR017, BMR003, BMR003N, 4P1516, RU1321, 20340, 10325408, 10356906, 10397570, 15827470, 15827491, 15850268, 19260762, 22754990, 52495874, 52497491, 89018653, 89018778, 89018849, 89018964, 89019351, 93803635, 93803636, RU359, RU631, JA1639
Frequently Asked Questions
What does a blower motor resistor do?
It controls the current going to the front HVAC blower motor so the fan can run at each of its speed settings.
What comes in the Dorman blower motor resistor kit?
Each 973-508 kit includes a resistor and a harness pigtail, so the connector can be replaced along with the resistor.
What are signs this part may need replacing?
Signs include a blower that runs only on high, fan speeds that do not work, or a melted or corroded connector. The motor or switch can cause similar symptoms, so diagnose the circuit first.
Does 973-508 fit a 2003-2006 Chevrolet Silverado 1500?
Yes. It is listed for the 2003-2006 Chevrolet Silverado 1500 and the 2003-2006 GMC Sierra 1500. Check the "Vehicles it fits" section for your exact vehicle.
Why is a harness pigtail included?
Dorman calls the pigtail essential for most repairs. It lets you replace the connector along with the overheated or corroded resistor.
