Dorman 645-528 HVAC Blower Motor Resistor Connector

Dorman 645-528 HVAC Blower Motor Resistor Connector

Restore a damaged blower motor resistor connection with the Dorman 645-528 HVAC blower motor resistor connector. This replacement harness is built for vehicles where the original connector has been affected by corrosion or overheating, helping bring back reliable blower motor circuit performance.

Compatible with select Chevrolet Malibu, Pontiac G6, Chevrolet Trailblazer, GMC Envoy, Saturn Aura, Chevrolet Cobalt, Chevrolet Colorado, Chevrolet HHR, GMC Canyon, Pontiac G5, Pontiac Vibe, Buick Terraza, Chevrolet Express, GMC Savana, Chevrolet SSR, Trailblazer EXT, Envoy XL, Envoy XUV, and Oldsmobile Bravada applications with a 4-way connector and leads.

• Direct replacement HVAC blower motor resistor connector
• 4-wire, female blade terminal design
• 12-gauge wire measurement for blower motor resistor circuits
• Corrosion-resistant tin brass terminals with tin plating
• 15.75 in overall length for harness routing
• Includes a lock and butt connectors for repair use

Detailed Product Overview

The Dorman 645-528 is a blower motor resistor connector designed for HVAC electrical repair where the original connector has been damaged by heat, corrosion, or terminal wear. It uses female blade terminals and 12-gauge wiring to match the demands of blower motor resistor circuits. This part is a practical OE-style repair for vehicles such as the Chevrolet Malibu, Pontiac G6, and GMC Envoy, as well as many other GM platforms listed in the fitment data. This part cross-references Standard Ignition S-1352 and Premium Guard PT1231 for the same application.

Common Problems This Part Can Address

• Blower motor stops working at certain speed settings
• Intermittent HVAC fan operation caused by a damaged connector
• Heat-related melting or discoloration at the resistor plug
• Corrosion at the terminal connection
• Loose or weakened electrical contact at the blower resistor harness

Installation Notes and Tips

Inspect the resistor and surrounding wiring before installation. If the original connector shows heat damage, corrosion, or brittle insulation, replace the affected section before reconnecting the HVAC blower motor resistor. Verify the vehicle uses a 4-way connector with leads and confirm terminal orientation before final assembly.

Quality Assurance

Dorman designs replacement electrical connectors to address common OE connector failure points, including corrosion and overheating. The tin brass terminal material and corrosion-resistant construction support dependable electrical contact in HVAC blower motor resistor service.