Dorman 645-516 HVAC Blower Switch Connector - Front or Rear

Dorman HVAC Blower Switch Connector 645-516

Dorman 645-516 is an HVAC blower switch connector built to match the original connector’s appearance and function on specified vehicles. It uses quality plastic construction and pin terminals for a direct electrical repair on manual climate control systems with rear window defogger applications.

Key Features

• Direct replacement HVAC blower switch connector for specified GM and related applications
• Plastic connector body with pin terminal design
• 14-gauge wire measurement for repair wiring needs
• 15.75-inch connector length for service and splice work
• Designed for manual air conditioning controls with rear window defogger
• Fits front and rear positions on listed vehicles

Detailed Description

This HVAC blower switch connector is engineered to restore a secure electrical connection where the original connector has heat damage, broken terminals, or worn locking surfaces. Dorman 645-516 is listed for a wide range of Chevrolet, GMC, Cadillac, Buick, Isuzu, Saab, and Oldsmobile models, including Chevrolet Trailblazer, GMC Envoy, and Chevrolet Silverado 1500 applications with manual air conditioning controls and rear window defogger. This part cross-references Standard Ignition S-804 for the same application.

Built to match the original hardware on specified applications, this connector supports reliable blower switch circuit repair without changing the factory-style layout. It is a practical choice for HVAC electrical connector replacement on vehicles such as Chevrolet Trailblazer and GMC Envoy, where blower switch connector failure can interrupt climate control operation.

Common Problems This Part Can Address

• Blower motor speed control loss caused by a damaged switch connector
• Melted or heat-stressed terminals at the HVAC control head
• Intermittent HVAC operation from loose or corroded pin connections
• Broken connector housing that no longer locks securely
• Electrical repair needs after a failed blower switch circuit

Installation Notes and Tips

Verify the vehicle uses manual air conditioning controls and a rear window defogger before ordering. Match the connector to the original terminal style and wire gauge, and inspect the mating switch and harness for heat damage before installation. Proper splicing and terminal crimping are important for a stable repair, especially on front or rear HVAC locations listed for Chevrolet Silverado 1500, GMC Sierra 1500, and related models.

Quality Assurance

Dorman designs this connector to follow the original part’s fit and function on specified applications and manufactures it from quality materials for dependable service. Part number 645-516 is built for repair-focused use in HVAC electrical systems and is backed by Dorman’s product engineering standards.