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Four Seasons 73446 HVAC Blend Door Actuator for 1997-2002, 2004-2009 Chevrolet T6500
Verify fitment before purchase — please check the Fitment section below.
Key Specifications
- Brand: Four Seasons
- Manufacturer Part Number: 73446
- Part Type: HVAC Blend Door Actuator
- Condition: New
- Warranty: 1 Year
Vehicle Compatibility
Fits select vehicle applications. Please enter your vehicle or check the Fitment section below to confirm compatibility.
Restore precise airflow control with this Four Seasons HVAC Blend Door Actuator. Designed to adjust air distribution and temperature blend inside the HVAC housing, it helps maintain accurate cabin climate control and proper system operation.
Why replace this part? A faulty air door actuator can cause incorrect airflow direction or uneven cabin temperature. Replacing it helps restore precise airflow control and consistent climate comfort.
Key Features & Benefits
- Precise airflow control — Adjusts cabin air direction for consistent comfort.
- Durable design — Resists wear and ensures long-term reliable operation.
- Supports climate consistency — Maintains accurate temperature and airflow distribution.
Product Overview
Build Quality & Materials
- Durable construction ensures consistent movement of airflow doors over time.
- Engineered to resist wear from repeated operation and mechanical stress.
- Designed for stable performance under normal HVAC system conditions.
Installation Notes
- Disconnect the battery before servicing HVAC electrical components.
- Verify correct actuator position and alignment prior to installation.
- Test system operation after installation to confirm proper airflow control.
Why Choose Four Seasons?
Four Seasons is a trusted leader in climate control and engine cooling components, supplying automotive replacement parts designed to support reliable system operation and long-term performance. With decades of industry experience, Four Seasons focuses on practical engineering solutions that help maintain comfort, efficiency, and dependability across a wide range of vehicle applications.
- Specialized focus on HVAC and engine cooling systems.
- Engineering-driven designs developed for consistent system operation.
- Components built for durability under normal driving conditions.
- Trusted by professional technicians and installers for reliable aftermarket solutions.
Four Seasons Engineering Advantage
Four Seasons applies proven engineering practices and application-specific design standards to develop components that support proper system function, consistent performance, and long-term reliability. Each part is designed to meet the operational demands of automotive HVAC and cooling systems, helping maintain stable performance under normal operating conditions.
Shipping & Warranty
- Fast U.S. shipping from our warehouse on business days.
- Free returns if the part does not fit or you are not satisfied (see store policy for details).
- 1-year warranty on this part from date of purchase.
Product Information
Item Specifics (Technical)
- Door Linkage: Arm
- Mounting Ear Qty.: 4
- Style: HVAC Air Door Actuator
- Terminal Pin Qty.: 9
Interchange Part Numbers
- 1835798290
- 1835798291
- 1835798300
- 1835798301
- 604951
- 73446
- 8972213110
- 900446
- 97721515
- A60446
- BDAB1392
- DA1360
- MT18839
Fitment
Vehicle Compatibility
- Chevrolet T6500
- 1997-2002 Chevrolet T6500
- 2004-2009 Chevrolet T6500
- Chevrolet T7500
- 1997-2002 Chevrolet T7500
- 2004-2009 Chevrolet T7500
- Chevrolet T8500
- 2004-2009 Chevrolet T8500
- GMC T6500
- 1997-2002 GMC T6500
- 2004-2009 GMC T6500
- GMC T7500
- 1997-2002 GMC T7500
- 2004-2009 GMC T7500
- Isuzu FRR
- 2000-2004 Isuzu FRR
- Isuzu FSR
- 1996-2002 Isuzu FSR
- Isuzu FTR
- 1996-2009 Isuzu FTR
- Isuzu FVR
- 1996-2009 Isuzu FVR
- Isuzu FXR
- 2004-2009 Isuzu FXR
- Fitment TypeVehicle Specific
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 1996 | Isuzu | FSR | Base (7.1L L6 DIESEL Turbocharged) | |
| 1996 | Isuzu | FTR | Base (7.1L L6 DIESEL Turbocharged) | |
| 1996 | Isuzu | FVR | Base (7.1L L6 DIESEL Turbocharged) | |
| 1997 | Chevrolet | T6500 | F6B042 (6.0L 366cid V8) | |
| 1997 | Chevrolet | T6500 | F6B042 (6.6L DIESEL Turbocharged) | |
| 1997 | Chevrolet | T7500 | F7B042 (6.0L 366cid V8) | |
| 1997 | Chevrolet | T7500 | F7B042 (6.6L DIESEL Turbocharged) | |
| 1997 | Chevrolet | T7500 | F7B064 (6.6L DIESEL Turbocharged) | |
| 1997 | GMC | T6500 | F6B042 (6.0L 366cid V8) | |
| 1997 | GMC | T6500 | F6B042 (6.6L DIESEL Turbocharged) | |
| 1997 | GMC | T7500 | F7B042 (6.0L 366cid V8) | |
| 1997 | GMC | T7500 | F7B042 (6.6L DIESEL Turbocharged) | |
| 1997 | Isuzu | FSR | Base (7.1L L6 DIESEL Turbocharged) | |
| 1997 | Isuzu | FTR | Base (7.1L L6 DIESEL Turbocharged) | |
| 1997 | Isuzu | FVR | Base (7.1L L6 DIESEL Turbocharged) | |
| 1998 | Chevrolet | T6500 | F6B042 (6.0L 366cid V8) | |
| 1998 | Chevrolet | T6500 | F6B042 (6.6L DIESEL Turbocharged) | |
| 1998 | Chevrolet | T6500 | F6B042 (7.2L DIESEL Turbocharged) | |
| 1998 | Chevrolet | T7500 | F7B042 (6.0L 366cid V8) | |
| 1998 | Chevrolet | T7500 | F7B042 (6.6L DIESEL Turbocharged) | |
| 1998 | Chevrolet | T7500 | F7B042 (7.2L DIESEL Turbocharged) | |
| 1998 | Chevrolet | T7500 | F7B064 (7.2L DIESEL Turbocharged) | |
| 1998 | GMC | T6500 | F6B042 (6.0L 366cid V8) | |
| 1998 | GMC | T6500 | F6B042 (6.6L DIESEL Turbocharged) | |
| 1998 | GMC | T6500 | F6B042 (7.2L DIESEL Turbocharged) | |
| 1998 | GMC | T7500 | F7B042 (6.0L 366cid V8) | |
| 1998 | GMC | T7500 | F7B042 (6.6L DIESEL Turbocharged) | |
| 1998 | GMC | T7500 | F7B042 (7.2L DIESEL Turbocharged) | |
| 1998 | Isuzu | FSR | Base (7.1L L6 DIESEL Turbocharged) | |
| 1998 | Isuzu | FSR | Base (7.8L L6 DIESEL Turbocharged) | |
| 1998 | Isuzu | FTR | Base (7.1L L6 DIESEL Turbocharged) | |
| 1998 | Isuzu | FTR | Base (7.8L L6 DIESEL Turbocharged) | |
| 1998 | Isuzu | FVR | Base (7.1L L6 DIESEL Turbocharged) | |
| 1998 | Isuzu | FVR | Base (7.8L L6 DIESEL Turbocharged) | |
| 1999 | Chevrolet | T6500 | F6B042 (7.2L DIESEL Turbocharged) | |
| 1999 | Chevrolet | T6500 | F6B042 (7.8L L6 DIESEL Turbocharged) | |
| 1999 | Chevrolet | T7500 | F7B042 (7.2L DIESEL Turbocharged) | |
| 1999 | Chevrolet | T7500 | F7B042 (7.8L L6 DIESEL Turbocharged) | |
| 1999 | Chevrolet | T7500 | F7B064 (7.2L DIESEL Turbocharged) | |
| 1999 | GMC | T6500 | F6B042 (7.2L DIESEL Turbocharged) | |
| 1999 | GMC | T6500 | F6B042 (7.8L L6 DIESEL Turbocharged) | |
| 1999 | GMC | T7500 | F7B042 (7.2L DIESEL Turbocharged) | |
| 1999 | GMC | T7500 | F7B042 (7.8L L6 DIESEL Turbocharged) | |
| 1999 | Isuzu | FSR | Base (7.8L L6 DIESEL Turbocharged) | |
| 1999 | Isuzu | FTR | Base (7.8L L6 DIESEL Turbocharged) | |
| 1999 | Isuzu | FVR | Base (7.8L L6 DIESEL Turbocharged) | |
| 2000 | Chevrolet | T6500 | F6B042 (7.2L DIESEL Turbocharged) | |
| 2000 | Chevrolet | T6500 | F6B042 (7.8L L6 DIESEL Turbocharged) | |
| 2000 | Chevrolet | T7500 | F7B042 (7.2L DIESEL Turbocharged) | |
| 2000 | Chevrolet | T7500 | F7B042 (7.8L L6 DIESEL Turbocharged) | |
| 2000 | Chevrolet | T7500 | F7B064 (7.2L DIESEL Turbocharged) | |
| 2000 | GMC | T6500 | F6B042 (7.2L DIESEL Turbocharged) | |
| 2000 | GMC | T6500 | F6B042 (7.8L L6 DIESEL Turbocharged) | |
| 2000 | GMC | T7500 | F7B042 (7.2L DIESEL Turbocharged) | |
| 2000 | GMC | T7500 | F7B042 (7.8L L6 DIESEL Turbocharged) | |
| 2000 | Isuzu | FRR | Base (7.8L L6 DIESEL Turbocharged) | |
| 2000 | Isuzu | FSR | Base (7.8L L6 DIESEL Turbocharged) | |
| 2000 | Isuzu | FTR | Base (7.8L L6 DIESEL Turbocharged) | |
| 2000 | Isuzu | FVR | Base (7.8L L6 DIESEL Turbocharged) | |
| 2001 | Chevrolet | T6500 | F6B042 (7.2L DIESEL Turbocharged) | |
| 2001 | Chevrolet | T6500 | F6B042 (7.8L L6 DIESEL Turbocharged) | |
| 2001 | Chevrolet | T7500 | F7B042 (7.2L DIESEL Turbocharged) | |
| 2001 | Chevrolet | T7500 | F7B042 (7.8L L6 DIESEL Turbocharged) | |
| 2001 | Chevrolet | T7500 | F7B064 (7.2L DIESEL Turbocharged) | |
| 2001 | GMC | T6500 | F6B042 (7.2L DIESEL Turbocharged) | |
| 2001 | GMC | T6500 | F6B042 (7.8L L6 DIESEL Turbocharged) | |
| 2001 | GMC | T7500 | F7B042 (7.2L DIESEL Turbocharged) | |
| 2001 | GMC | T7500 | F7B042 (7.8L L6 DIESEL Turbocharged) | |
| 2001 | Isuzu | FRR | Base (7.8L L6 DIESEL Turbocharged) | |
| 2001 | Isuzu | FSR | Base (7.8L L6 DIESEL Turbocharged) | |
| 2001 | Isuzu | FTR | Base (7.8L L6 DIESEL Turbocharged) | |
| 2001 | Isuzu | FVR | Base (7.8L L6 DIESEL Turbocharged) | |
| 2002 | Chevrolet | T6500 | F6B042 (7.2L DIESEL Turbocharged) | |
| 2002 | Chevrolet | T6500 | F6B042 (7.8L L6 DIESEL Turbocharged) | |
| 2002 | Chevrolet | T7500 | F7B042 (7.2L DIESEL Turbocharged) | |
| 2002 | Chevrolet | T7500 | F7B042 (7.8L L6 DIESEL Turbocharged) | |
| 2002 | Chevrolet | T7500 | F7B064 (7.2L DIESEL Turbocharged) | |
| 2002 | GMC | T6500 | F6B042 (7.2L DIESEL Turbocharged) | |
| 2002 | GMC | T6500 | F6B042 (7.8L L6 DIESEL Turbocharged) | |
| 2002 | GMC | T7500 | F7B042 (7.2L DIESEL Turbocharged) | |
| 2002 | GMC | T7500 | F7B042 (7.8L L6 DIESEL Turbocharged) | |
| 2002 | Isuzu | FRR | Base (7.8L L6 DIESEL Turbocharged) | |
| 2002 | Isuzu | FSR | Base (7.8L L6 DIESEL Turbocharged) | |
| 2002 | Isuzu | FTR | Base (7.8L L6 DIESEL Turbocharged) | |
| 2002 | Isuzu | FVR | Base (7.8L L6 DIESEL Turbocharged) | |
| 2003 | Isuzu | FRR | Base (7.8L L6 DIESEL Turbocharged) | |
| 2003 | Isuzu | FTR | Base (7.8L L6 DIESEL Turbocharged) | |
| 2003 | Isuzu | FVR | Base (7.8L L6 DIESEL Turbocharged) | |
| 2004 | Chevrolet | T6500 | F6B042 (7.8L L6 DIESEL Turbocharged) | |
| 2004 | Chevrolet | T6500 | T6F042 (7.8L L6 DIESEL Turbocharged) | |
| 2004 | Chevrolet | T7500 | F7B042 (7.8L L6 DIESEL Turbocharged) | |
| 2004 | Chevrolet | T7500 | T7F042 (7.8L L6 DIESEL Turbocharged) | |
| 2004 | Chevrolet | T8500 | F8B042 (7.8L L6 DIESEL Turbocharged) | |
| 2004 | Chevrolet | T8500 | F8B064 (7.8L L6 DIESEL Turbocharged) | |
| 2004 | GMC | T6500 | T6F042 (7.8L L6 DIESEL Turbocharged) | |
| 2004 | GMC | T7500 | T7F042 (7.8L L6 DIESEL Turbocharged) | |
| 2004 | Isuzu | FRR | Base (7.8L L6 DIESEL Turbocharged) | |
| 2004 | Isuzu | FTR | Base (7.8L L6 DIESEL Turbocharged) | |
| 2004 | Isuzu | FVR | Base (7.8L L6 DIESEL Turbocharged) | |
| 2004 | Isuzu | FXR | Base (7.8L L6 DIESEL Turbocharged) |
- BrandFour Seasons
- ManufacturerFour Seasons
- MPN73446
- EAN00096361155596
- Fitment Typespecific
- Part DescriptionHVAC Air Door Actuator
- Part TypeHVAC Blend Door Actuator
- Interchange Part Number1835798290; 1835798291; 1835798300; 1835798301; 604951; 73446; 8972213110; 900446; 97721515; A60446; BDAB1392; DA1360; MT18839
- Short DescriptionAir Door Actuator
Shipping Policy – DTautoparts
We ship all orders from our U.S. warehouses with USPS, UPS, or FedEx.
Processing Time
Orders placed before 3 PM EST ship the same day
Others ship next business day
Transit Time
Standard shipping: 2–5 business days
Expedited shipping: 1–3 business days (optional at checkout)
Shipping Rates
Free standard shipping on all orders
Expedited options available at checkout
Tracking
All orders include tracking information, emailed automatically once shipped.
Lost Packages
If a package is lost in transit, we will:
Start an investigation with the carrier
Resend the order or issue a full refund if confirmed lost
Incorrect Addresses
If the address is incorrect when the order ships:
Carrier may return the package
We can resend (buyer pays reship fee) or refund the order
Return Policy – DTautoparts
At DTautoparts, we want every customer to be fully satisfied with their purchase.
If an item does not fit your vehicle or you are not fully satisfied, we offer hassle-free returns.
Return Window
Returns accepted within 30 days of delivery.
Items must be returned in their original condition unless the item was defective or damaged on arrival.
Free Returns
If the part doesn’t fit, or arrives damaged, we provide a free return shipping label.
Customer-Responsibility Returns
(used, installed, incorrect item ordered, changed mind)
Buyer pays return shipping.
Item must be unused, uninstalled, and in original packaging.
Incorrect / Defective Parts
If the part is faulty, damaged, or the wrong item was sent:
We will provide a free return label
And issue a full refund OR send a replacement
Refund Time
Refunds are processed within 2–3 business days after the returned item is received and inspected.
Warranty
All parts sold by DTautoparts LLC are backed by a 1-year warranty.
What’s Covered
Manufacturing defects
Premature failure
Broken components not caused by external damage
What’s Not Covered
Normal wear and tear
Improper installation
Damage from accidents or abuse
Modified or altered parts
How to Request a Warranty Claim
Please contact us with:
Order number
Description of the issue
Photos or videos of the problem
We will:
Review the claim in 24–48 hours
Provide a replacement or refund if approved
Frequently Asked Questions
Does this part fit my vehicle?
Use the Year/Make/Model selector at the top of the page.
If unsure, contact us — we respond within minutes.
Is this part new or used?
All parts are brand-new, factory-fresh, and never used.
Does this include hardware?
If included, it will appear in the product images or description.
If not listed, assume hardware is not included.
What if the part doesn’t fit?
No problem — we offer free returns on items that do not fit your vehicle.
What warranty does this part come with?
Every part includes a 1-year warranty.
How fast do you ship?
Orders before 3 PM EST ship the same day.






