Dorman 973-529 HVAC Blower Motor Resistor Kit

Dorman 973-529 HVAC Blower Motor Resistor Kit

Dorman 973-529 is an HVAC blower motor resistor kit that replaces an overheated or corroded original resistor on select vehicles. It includes the resistor and a harness pigtail to restore blower speed control in the auxiliary HVAC system.

• HVAC blower motor resistor kit for auxiliary heating and cooling systems
• Includes a replacement resistor and wire harness pigtail
• Female connector with male blade terminals
• 4-wire harness with a 6-inch lead length
• 2 mounting holes and 4 terminals for direct replacement applications
• Compatible with Chevrolet Express 1500, Express 2500, Express 3500 and GMC Savana 1500, Savana 2500, Savana 3500 applications

Fitment and application details

This part is built for vehicles that use an auxiliary HVAC blower motor resistor assembly. It fits 1996-2019 Chevrolet Express 2500, 1996-2019 Chevrolet Express 3500, 1996-2019 GMC Savana 2500, 1996-2019 GMC Savana 3500, 1996-2014 Chevrolet Express 1500, and 1996-2014 GMC Savana 1500. For buyers searching by part number, Dorman 973-529 is a direct-reference option for the same application.

This part cross-references DR770 and RU662 for the same application.

Common problems this part can address

• Blower motor only works on certain speed settings
• No airflow from the auxiliary HVAC blower
• Intermittent fan operation caused by heat-damaged resistor circuits
• Corroded or burned connector at the resistor harness
• Loss of cabin comfort control in Chevrolet Express and GMC Savana auxiliary HVAC systems

Installation notes and tips

Inspect the connector, terminals, and surrounding wiring before installation. If the original resistor shows heat damage or corrosion, replace the harness pigtail at the same time to help ensure a secure electrical connection. Verify the vehicle uses the auxiliary HVAC unit listed in the fitment data before ordering. Dorman 973-529 uses a female connector, male blade terminals, and a 4-wire layout, so confirm the original connector style matches.

Quality assurance

Dorman supplies replacement electrical components for vehicle repair applications, and this kit is engineered to replace the original resistor and connector assembly on the listed Chevrolet Express and GMC Savana models. Use the fitment details above to confirm application by year and model before installation.