Designed to help bring back normal fan-speed control, the Dorman hvac blower motor resistor kit, part number 973-566, pairs a new resistor with a harness pigtail to replace an overheated or corroded original equipment resistor. It fits many vehicles, among them the 2000-2005 Buick LeSabre, 2000-2005 Cadillac DeVille and 2000-2005 Pontiac Bonneville. See the "Vehicles it fits" section for the full list.
The blower motor resistor sets the speeds of the heating and air-conditioning fan. When the original overheats or corrodes, fitting a new Dorman blower motor resistor together with a fresh harness pigtail addresses both pieces in one repair.
- Direct replacement: this resistor and harness kit directly replaces the original equipment on the listed applications.
- Kit contents: each kit supplies a resistor and a harness pigtail, which Dorman notes is essential for most repairs.
- OE-like performance: made to perform like the original equipment, helping return the HVAC system to full operation when the resistor is at fault.
- Quality backing: supported by Dorman's team of engineers and quality specialists in the USA.
Signs the resistor may need replacing include a blower that runs on only some speed settings, or a fan that does not run at all. Diagnose the cause before ordering, since the blower motor, switch or fuses can produce similar symptoms.
Interchange: 4P1424 · RU1229 · 20956 · 52480042 · RU536 · JA1557
This part cross-references / interchanges with the following part numbers:
4P1424, RU1229, 20956, 52480042, RU536, JA1557
Frequently Asked Questions
What comes in the Dorman blower motor resistor kit 973-566?
Each kit includes a blower motor resistor and a harness pigtail, so both can be replaced during the same repair.
What does a blower motor resistor do?
It controls the current sent to the blower motor so the heating and air-conditioning fan can run at different speed settings.
What are signs the blower motor resistor may need replacing?
A blower that works on only certain speed settings, or not at all, may mean the resistor has failed. Check the blower motor, switch and fuses too before replacing parts.
Does the 973-566 fit the 2000-2005 Buick LeSabre?
Yes, it is listed for the 2000-2005 Buick LeSabre, as well as the 2000-2005 Cadillac DeVille and 2000-2005 Pontiac Bonneville. The "Vehicles it fits" section shows every application.
Why does the kit include a harness pigtail?
Dorman describes the pigtail as essential for most repairs, since the kit is intended to replace an overheated or corroded original resistor.
