Home› HVAC > Control Modules› Dorman 599-266 HVAC Control Module - Front
Dorman 599-266 HVAC Control Module - FrontOE Quality 60-Day Returns
Dorman 599-266 HVAC Control Module - Front - view 1
Dorman 599-266 HVAC Control Module - Front - view 2
Part #: 599-266

Dorman 599-266 HVAC Control Module - Front

Front
⚙️ 52 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$362.32Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
✅OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Cadillac, Chevrolet, and GMC, Escalade, Escalade EXT, Avalanche 1500, Avalanche 2500, Silverado 1500, Silverado 1500 HD, Silverado 2500, Silverado 2500 HD, Silverado 3500, Suburban 1500, Suburban 2500, Tahoe, Sierra 1500, Sierra 1500 HD, Sierra 2500, Sierra 2500 HD, Sierra 3500, Yukon, Yukon XL 1500, and Yukon XL 2500
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST
Not what you need? Click here for all HVAC Control Module options

Overview of Dorman HVAC Control Module 599-266

The Dorman HVAC Control Module 599-266 is designed for reliable climate control operation in select General Motors vehicles. This bolt-on module requires no programming and is engineered to restore proper HVAC functionality in Cadillac, Chevrolet, and GMC models.

  • No programming required for straightforward installation
  • Compatible with multiple GM trucks and SUVs including Silverado, Sierra, Yukon, and Escalade
  • Features 2 female connectors and 12 male terminals for secure electrical connections
  • Black housing with pin-type terminals for durability and fitment
  • Bolt-on mounting type for easy replacement without additional hardware

Detailed Product Description

The Dorman 599-266 HVAC Control Module is a direct replacement part designed to fit a range of GM vehicles such as the Chevrolet Silverado 1500, GMC Sierra 2500 HD, Cadillac Escalade EXT, and Yukon XL 2500. This module controls the heating, ventilation, and air conditioning system without the need for programming, simplifying the repair process. It includes two female connectors and a total of 12 male terminals arranged in pin-type configuration, ensuring a secure and reliable electrical connection. The black housing is built for durability and designed to mount easily using bolts, although mounting hardware is not included.

Common Applications and Issues Resolved

  • Restores HVAC control functionality in Chevrolet Silverado and GMC Sierra models
  • Fixes unresponsive or erratic climate control in Cadillac Escalade and Yukon vehicles
  • Addresses issues with temperature regulation and fan speed control
  • Eliminates problems caused by faulty or damaged control modules
  • Improves overall HVAC system reliability in compatible GM trucks and SUVs

Installation Notes and Tips

  • Ensure vehicle compatibility with the Dorman 599-266 part number before installation
  • Disconnect the battery prior to module replacement to prevent electrical damage
  • Use appropriate tools for bolt-on mounting; mounting hardware is not included
  • Verify connector orientation and terminal alignment during installation
  • No programming or additional configuration is necessary after installation

Quality Assurance and Warranty

Dorman HVAC Control Module 599-266 is manufactured to meet or exceed OEM specifications for fit, form, and function. While no instruction manual or mounting hardware is included, the module is designed for straightforward installation and reliable operation. This part is backed by Dorman's quality standards and typically includes a limited warranty to protect against defects in materials and workmanship.

BrandDorman
Part Number599-266
Automatic Temperature ControlNo
Connector GenderFemale
Connector Quantity2
Housing ColorBlack
Instruction Manual IncludedNo
Mounting Hardware IncludedNo
Mounting TypeBolt On
Package Contents1 HVAC Control Module
Programming RequiredNo
Terminal GenderMale
Terminal Quantity7
Terminal Quantity12
Terminal TypePin

This part fits 52 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2002CadillacEscaladeFront HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2002CadillacEscalade EXTFront HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2002ChevroletAvalanche 1500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2002ChevroletAvalanche 2500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2002ChevroletSilverado 1500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2002ChevroletSilverado 1500 HDFront HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2002ChevroletSilverado 2500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2002ChevroletSilverado 2500 HDFront HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2002ChevroletSilverado 3500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2002ChevroletSuburban 1500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2002ChevroletSuburban 2500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2002ChevroletTahoeFront HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2002GMCSierra 1500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2002GMCSierra 1500 HDFront HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2002GMCSierra 2500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2002GMCSierra 2500 HDFront HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2002GMCSierra 3500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2002GMCYukonFront HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2002GMCYukon XL 1500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2002GMCYukon XL 2500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2001ChevroletSilverado 1500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2001ChevroletSilverado 1500 HDFront HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2001ChevroletSilverado 2500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2001ChevroletSilverado 2500 HDFront HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2001ChevroletSilverado 3500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2001ChevroletSuburban 1500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2001ChevroletSuburban 2500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2001ChevroletTahoeFront HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2001GMCSierra 1500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2001GMCSierra 1500 HDFront HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2001GMCSierra 2500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2001GMCSierra 2500 HDFront HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2001GMCSierra 3500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2001GMCYukonFront HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2001GMCYukon XL 1500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2001GMCYukon XL 2500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2000ChevroletSilverado 1500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2000ChevroletSilverado 2500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2000ChevroletSuburban 1500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2000ChevroletSuburban 2500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2000ChevroletTahoe5.3LV8Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2000ChevroletTahoe4.8LV8Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2000GMCSierra 1500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2000GMCSierra 2500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2000GMCYukon5.3LV8Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2000GMCYukon4.8LV8Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2000GMCYukon XL 1500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
2000GMCYukon XL 2500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
1999ChevroletSilverado 1500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
1999ChevroletSilverado 2500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
1999GMCSierra 1500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured
1999GMCSierra 2500Front HVAC Control Module: w/Manual Air Conditioning Controls, without Rear Window Defogger, Remanufactured

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

15-72528150546971S109132403-48460953-12325HS394

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

Related Articles