Dorman 604-990 HVAC Blend Door Actuator - Auxiliary, Lower Main or Main
Dorman 604-990 HVAC Blend Door Actuator
Restore proper cabin temperature control with this Dorman HVAC blend door actuator, engineered for General Motors trucks and SUVs that use a rotary, 5-terminal actuator design. Dorman 604-990 is built for a direct replacement fit on many Chevrolet Silverado, GMC Sierra, Cadillac Escalade, and related applications, with captive screws that help simplify alignment inside the HVAC case.
- Black plastic housing and black connector for OE-style appearance
- Rotary switch activation type
- Female connector with 5 terminals and blade-style terminals
- Captive screws stay in place during installation
- Mounting hardware included
- Direct-fit replacement for selected GM HVAC blend door applications
Detailed Product Overview
This HVAC blend door actuator controls air door movement inside the heating and air conditioning case, helping direct airflow and temperature blend settings. It is a practical replacement for GM vehicles where the original actuator has failed, become noisy, or no longer responds correctly. The Dorman 604-990 is carefully tested for fit and function to reduce ordering confusion and support a seamless installation on the correct application.
Compatible With 1999-2014 Chevrolet Silverado, 1999-2014 GMC Sierra, 2000-2012 Chevrolet Tahoe, 2000-2014 GMC Yukon, and select Cadillac Escalade models. This part cross-references Standard Ignition ADR102 and Four Seasons 37537 for the same application.
Common Problems This Part Can Solve
- Temperature stuck on hot or cold
- Airflow not changing between vents and defrost
- Clicking or ticking from behind the dash
- HVAC blend door movement failure
- Inconsistent cabin temperature control
Installation Notes and Tips
Replacement often requires access behind the dashboard or inside tight HVAC housing areas. Verify the exact position and fitment details before ordering, since similar GM actuators can look alike but use different applications. The captive-screw design helps with alignment during installation, especially in confined spaces. Fits 2003-2014 Chevrolet Silverado 1500, Main; Fits 1999-2002 Chevrolet Silverado 1500, Lower Main; Fits 2003-2014 GMC Sierra 1500, Main; Fits 1999-2002 GMC Sierra 1500, Lower Main; Fits 2003-2014 Chevrolet Tahoe, Main; Fits 2000-2002 Chevrolet Tahoe, Lower Main.
Quality Assurance
Dorman designs and tests this actuator for exact fit and dependable operation on the listed GM applications. The part is intended to reduce installation issues and help ensure the replacement matches the vehicle’s HVAC actuator requirements.
Dorman 604-990 HVAC Blend Door Actuator - Auxiliary, Lower Main or Main
Dorman 604-990 HVAC Blend Door Actuator
Restore proper cabin temperature control with this Dorman HVAC blend door actuator, engineered for General Motors trucks and SUVs that use a rotary, 5-terminal actuator design. Dorman 604-990 is built for a direct replacement fit on many Chevrolet Silverado, GMC Sierra, Cadillac Escalade, and related applications, with captive screws that help simplify alignment inside the HVAC case.
- Black plastic housing and black connector for OE-style appearance
- Rotary switch activation type
- Female connector with 5 terminals and blade-style terminals
- Captive screws stay in place during installation
- Mounting hardware included
- Direct-fit replacement for selected GM HVAC blend door applications
Detailed Product Overview
This HVAC blend door actuator controls air door movement inside the heating and air conditioning case, helping direct airflow and temperature blend settings. It is a practical replacement for GM vehicles where the original actuator has failed, become noisy, or no longer responds correctly. The Dorman 604-990 is carefully tested for fit and function to reduce ordering confusion and support a seamless installation on the correct application.
Compatible With 1999-2014 Chevrolet Silverado, 1999-2014 GMC Sierra, 2000-2012 Chevrolet Tahoe, 2000-2014 GMC Yukon, and select Cadillac Escalade models. This part cross-references Standard Ignition ADR102 and Four Seasons 37537 for the same application.
Common Problems This Part Can Solve
- Temperature stuck on hot or cold
- Airflow not changing between vents and defrost
- Clicking or ticking from behind the dash
- HVAC blend door movement failure
- Inconsistent cabin temperature control
Installation Notes and Tips
Replacement often requires access behind the dashboard or inside tight HVAC housing areas. Verify the exact position and fitment details before ordering, since similar GM actuators can look alike but use different applications. The captive-screw design helps with alignment during installation, especially in confined spaces. Fits 2003-2014 Chevrolet Silverado 1500, Main; Fits 1999-2002 Chevrolet Silverado 1500, Lower Main; Fits 2003-2014 GMC Sierra 1500, Main; Fits 1999-2002 GMC Sierra 1500, Lower Main; Fits 2003-2014 Chevrolet Tahoe, Main; Fits 2000-2002 Chevrolet Tahoe, Lower Main.
Quality Assurance
Dorman designs and tests this actuator for exact fit and dependable operation on the listed GM applications. The part is intended to reduce installation issues and help ensure the replacement matches the vehicle’s HVAC actuator requirements.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Dorman 604-990 HVAC Blend Door Actuator
Restore proper cabin temperature control with this Dorman HVAC blend door actuator, engineered for General Motors trucks and SUVs that use a rotary, 5-terminal actuator design. Dorman 604-990 is built for a direct replacement fit on many Chevrolet Silverado, GMC Sierra, Cadillac Escalade, and related applications, with captive screws that help simplify alignment inside the HVAC case.
- Black plastic housing and black connector for OE-style appearance
- Rotary switch activation type
- Female connector with 5 terminals and blade-style terminals
- Captive screws stay in place during installation
- Mounting hardware included
- Direct-fit replacement for selected GM HVAC blend door applications
Detailed Product Overview
This HVAC blend door actuator controls air door movement inside the heating and air conditioning case, helping direct airflow and temperature blend settings. It is a practical replacement for GM vehicles where the original actuator has failed, become noisy, or no longer responds correctly. The Dorman 604-990 is carefully tested for fit and function to reduce ordering confusion and support a seamless installation on the correct application.
Compatible With 1999-2014 Chevrolet Silverado, 1999-2014 GMC Sierra, 2000-2012 Chevrolet Tahoe, 2000-2014 GMC Yukon, and select Cadillac Escalade models. This part cross-references Standard Ignition ADR102 and Four Seasons 37537 for the same application.
Common Problems This Part Can Solve
- Temperature stuck on hot or cold
- Airflow not changing between vents and defrost
- Clicking or ticking from behind the dash
- HVAC blend door movement failure
- Inconsistent cabin temperature control
Installation Notes and Tips
Replacement often requires access behind the dashboard or inside tight HVAC housing areas. Verify the exact position and fitment details before ordering, since similar GM actuators can look alike but use different applications. The captive-screw design helps with alignment during installation, especially in confined spaces. Fits 2003-2014 Chevrolet Silverado 1500, Main; Fits 1999-2002 Chevrolet Silverado 1500, Lower Main; Fits 2003-2014 GMC Sierra 1500, Main; Fits 1999-2002 GMC Sierra 1500, Lower Main; Fits 2003-2014 Chevrolet Tahoe, Main; Fits 2000-2002 Chevrolet Tahoe, Lower Main.
Quality Assurance
Dorman designs and tests this actuator for exact fit and dependable operation on the listed GM applications. The part is intended to reduce installation issues and help ensure the replacement matches the vehicle’s HVAC actuator requirements.
