Keep cabin airflow moving to the right vents with the Dorman - OE Solutions HVAC Blend Door Actuator 604-045, a direct-fit replacement for the MAIN air door position. This mode-type air door actuator drops into the listed applications, including the 2011-2013 Dodge Durango, 2011-2013 Jeep Grand Cherokee, 2013-2025 Kenworth T680, 2014-2025 Kenworth T880, 2023-2025 Peterbilt 537, 2022-2025 Peterbilt 548, 2014-2025 Peterbilt 567, 2013-2025 Peterbilt 579, and 2024-2025 Peterbilt 589 — see the Buyer's Guide tab for the full list and engine details.
An HVAC blend/mode door actuator is the small electric motor that drives the door inside the HVAC housing to control airflow direction. If a failed MAIN actuator is the cause, this unit replaces it to restore proper operation.
- Direct replacement: engineered to fit and function like the original air door actuator on the listed years, makes, models and configurations.
- Position specific: this covers the MAIN position — many vehicles use several actuators, so review the application notes to confirm the location and function you need.
- Durable construction: designed and tested to strict standards to help resist wear and electrical burnout for reliable operation.
- Trustworthy quality: backed by a team of experts and engineers in the United States.
Interchange: 577.75634
57775634 · APBDA0025 · ADS149 · ADS199 · G04027 · 545250008 · 68079488AA · 68079488AB · DA1027 · ADA239 · ADA509 · T6892001 · T6892003 · SK604045 · ADR149 · ADR199 · F04072
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does this blend door actuator do?
It is the small electric motor that drives the air door inside the HVAC housing to control airflow direction. This unit covers the MAIN position.
Which position does 604-045 replace?
It is cataloged for the MAIN air door position. Since many vehicles use several actuators, review the application notes to confirm the location and function you need.
Will this fit my vehicle?
It is a direct-fit replacement for the listed applications, including the Dodge Durango, Jeep Grand Cherokee, Kenworth T680/T880 and several Peterbilt models. See the Buyer's Guide tab for the full list.
What are signs this actuator may need replacing?
A clicking or tapping noise behind the dash, or air that won't change direction, can be signs. Diagnose the cause first, since other components can produce similar symptoms.
Does it come with mounting hardware?
This listing is for the actuator as described. Consult the vehicle service information for installation details and any additional parts required.
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