Replace an overheated or corroded blower motor resistor and its connector in one job with the Dorman HVAC blower motor resistor kit, part number 973-529, which pairs a new resistor with a harness pigtail. It fits many vehicles, among them the 1996-2019 Chevrolet Express 2500, 1996-2019 Chevrolet Express 3500 and 2009-2019 Chevrolet Express 4500. See the Buyer's Guide tab for the full list and engine details.
The blower motor resistor controls the current that reaches the blower motor, which gives the heater and A/C fan its lower speed settings. The harness pigtail is essential for most repairs, so it comes in the box with the resistor.
- Direct replacement: designed to directly replace the original equipment resistor and harness on the listed applications.
- Resistor and pigtail included: each kit contains a resistor and a harness pigtail.
- Made to perform like the original: built to perform like original equipment and intended to bring back full HVAC blower operation when a failed resistor is the cause.
- Engineering support: backed by Dorman's team of engineers and quality specialists in the USA.
Signs the resistor may need replacing include a blower that runs only on its highest setting, one or more fan speeds that do not work, or a melted or corroded connector. A blower motor, switch or wiring fault can cause similar symptoms, so diagnose the cause before you replace any parts.
Interchange: 3A1036 · RU1352 · 20696 · 52469502 · 52501844 · RU662 · DR770
This part cross-references / interchanges with the following part numbers:
3A1036, RU1352, 20696, 52469502, 52501844, RU662, DR770
