Dorman 604-123 HVAC Blend Door Actuator - Main

Dorman 604-123 HVAC Blend Door Actuator

Dorman 604-123 is a rotary HVAC blend door actuator built for specific GM vehicles with automatic temperature control systems. It is precision-engineered to match the quality and performance of the original blend door actuator, helping restore proper cabin temperature control in Buick, Oldsmobile, Pontiac, and Cadillac applications.

• Rotary switch activation type for HVAC temperature blend control
• Plastic housing construction
• Includes actuator only
• OE-style replacement for select automatic temperature control systems
• Direct-fit coverage for multiple Buick, Oldsmobile, Pontiac, and Cadillac models

Fitment and Application Details

Compatible with 1992-1999 Buick LeSabre, Main; 1992-1996 Buick Park Avenue, Main; 1992-1999 Oldsmobile 88, Main; 1992-1996 Oldsmobile 98, Main; 1996-1999 Oldsmobile LSS, Main; 1997-1998 Oldsmobile Regency, Main; 1992-1995 Pontiac Bonneville, Main; 1996-1999 Pontiac Bonneville, Main; 1992-1993 Cadillac Commercial Chassis, Main; 1992-1993 Cadillac DeVille, Main; 1992 Cadillac Fleetwood, Main; and 1993 Cadillac 60 Special, Main. This part cross-references Four Seasons 73032 and Autotecnica BU0613083 for the same application.

What This Actuator Helps Restore

• Incorrect cabin temperature output
• Stuck hot or cold air from the vents
• Inconsistent blend door movement
• HVAC temperature control response issues
• Failure of the automatic temperature control system to regulate air mix properly

Installation Notes and Quality Assurance

Verify the vehicle’s HVAC system uses the listed automatic temperature control or RPO code configuration before ordering. On many applications, access is limited behind the dash, so confirm connector style, mounting points, and blend door operation during diagnosis. Dorman 604-123 is engineered as a replacement for the original actuator on the specified vehicles, including Buick LeSabre, Oldsmobile 88, and Pontiac Bonneville applications.

Dorman designs this HVAC blend door actuator to match original equipment performance for the listed fitments. Part number 604-123 is intended for direct replacement use on the confirmed vehicle applications above.