Dorman 973-077 HVAC Blower Motor Resistor

Reliable HVAC Blower Motor Resistor for Chevrolet and GMC Vehicles

The Dorman 973-077 HVAC blower motor resistor is designed to restore proper blower motor function in select Chevrolet and GMC vans and trucks. Engineered to meet OEM specifications, this resistor ensures consistent HVAC performance for your vehicle's heating and cooling system.

• Compatible with Chevrolet G10, G20, G30, P30, and GMC P3500 models
• Features 2 bolt holes for secure mounting
• Includes a single regular-shaped male connector with 4 male blade terminals
• Does not include wiring harness or mounting hardware
• Package contains the blower motor resistor and installation instructions

Product Details and Specifications

The Dorman 973-077 blower motor resistor is designed with two bolt holes to ensure a stable and secure fit within the HVAC system of Chevrolet G10, G20, G30, P30, and GMC P3500 vehicles. It features a single connector with a regular shape and four male blade terminals, providing reliable electrical connections without the need for additional wiring harnesses. This part is engineered to replace the original resistor, restoring proper blower motor speed control and improving HVAC system functionality.

Common Applications and Problem Resolution

This blower motor resistor is used to regulate the speed of the HVAC blower motor in compatible Chevrolet and GMC vans and trucks. It addresses several common issues, including:

• Blower motor only working on high speed
• Intermittent or no airflow from HVAC vents
• Inconsistent blower motor speeds
• Complete failure of the blower motor resistor
• HVAC system overheating due to resistor malfunction

Installation Notes and Tips

Installation of the Dorman 973-077 blower motor resistor requires removal of the old resistor from the HVAC housing. Ensure the vehicle is powered off before beginning work. The part mounts using two bolts (not included), and the connector plugs directly into the vehicle’s wiring harness. No additional wiring harness or mounting hardware is included, so retain original components or source separately if needed. Follow the included instructions carefully to ensure proper installation and avoid damage to the HVAC system.

Quality Assurance and Warranty Information

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 973-077 blower motor resistor undergoes quality control testing to ensure durability and reliable performance in Chevrolet and GMC vehicles. This part comes with a limited warranty covering defects in material and workmanship, providing confidence in its long-term operation.