Dorman 973-403 HVAC Blower Motor Resistor Kit

Dorman 973-403 HVAC Blower Motor Resistor Kit

Dorman 973-403 is an HVAC blower motor resistor kit that replaces a failed original resistor and the damaged connector that often goes with it. It is built for vehicles where heat or corrosion has affected blower speed control, including Chevrolet Blazer, Chevrolet S10, GMC Sonoma, GMC Jimmy, and Oldsmobile Bravada applications.

Key Features

• Includes a blower motor resistor and harness pigtail for a complete electrical repair
• Uses a 4-wire, blade-terminal design with a female connector and male terminals
• 6-inch wiring harness length for connector replacement at the HVAC resistor location
• 3 mounting holes for OE-style installation alignment
• Direct replacement for select 1994-2005 Chevrolet, GMC, and Oldsmobile HVAC systems
• Cross-references Standard Ignition RU1027 for the same application

Detailed Description

This Dorman HVAC blower motor resistor kit is made for restoring blower fan speed control when the original resistor has overheated or the connector has become corroded or heat-damaged. The included harness pigtail addresses the common connector-side failure that can occur alongside resistor failure, helping complete the repair at the HVAC electrical connection. Part number 973-403 is listed for select Chevrolet Blazer and S10, GMC Sonoma and Jimmy, and Oldsmobile Bravada models across the 1994-2005 model years.

Compatible With 1995-2005 Chevrolet Blazer, N/A; 1994-2004 Chevrolet S10, N/A; 1994-2004 GMC Sonoma, N/A; 1995-2001 GMC Jimmy, N/A; and 1996-2001 Oldsmobile Bravada, N/A. This part number 973-403 is a practical OE-style replacement when the blower motor resistor and connector need attention at the same time.

What It Helps Fix

• Blower motor only working on certain fan speeds
• No cabin airflow from the HVAC blower on selected settings
• Intermittent blower operation caused by a failing resistor circuit
• Heat-damaged or corroded resistor connector terminals
• Electrical resistance issues at the blower motor resistor harness connection

Installation Notes and Tips

Inspect the resistor connector and surrounding wiring before installation, since heat damage often extends beyond the resistor itself. Verify the connector orientation, terminal condition, and mounting-hole alignment before securing the replacement. For best results, confirm vehicle year, make, and model against the listed fitment before ordering and compare the original connector style to the included harness.

Quality Assurance

Dorman replacement electrical components are engineered to address common OE failure points with application-specific fitment and connector details. Part number 973-403 is built for direct replacement use on the listed Chevrolet, GMC, and Oldsmobile vehicles.