Dorman 599-020 HVAC Control Module - Front or Rear
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Dorman

Dorman 599-020 HVAC Control Module - Front or Rear

Brand Dorman 599-020
Position Front
Automatic Temperature Control Yes
Connector Gender Female
Housing Color Black
Instruction Manual Included No
Mounting Hardware Included No
Mounting Type Bolt On
Package Contents 1 HVAC Control Module
Pin Count 16
Programming Required No
Terminal Gender Male
Terminal Quantity 36
Terminal Type Pin
Fits Chevrolet, GMC, and Buick · 14 vehicles

Direct replacement. Seamlessly restores HVAC control operation with a fully tested replacement unit.

Bolt-on installation. No programming required for a straightforward swap.

Automatic temperature control. Built for vehicles equipped with automatic climate control.

Cross-references 15-73543 and 15845093 for the same application. See all 2.

$455.32Free shipping
In stock · usually ships same day before 1pm CST
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Order total $455.32
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Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all HVAC Control Module options

HVAC Control Module for Trailblazer, Envoy, and Rainier

Restore climate control function with this Dorman HVAC control module, part number 599-020. It is a fully tested replacement for vehicles with automatic temperature control and is built for direct bolt-on installation with no programming required.

  • Direct replacement HVAC control module for automatic climate systems
  • No programming required after installation
  • Female connector with male terminals
  • Black housing with bolt-on mounting
  • Terminal count: 36; pin count: 16
  • Package contents: 1 HVAC control module

Detailed Product Overview

Dorman 599-020 is an HVAC control module for automatic air conditioning systems used in select Chevrolet Trailblazer, GMC Envoy, and Buick Rainier applications. If the original climate control unit has failed, this replacement module provides a straightforward way to restore blower, temperature, and system control functions without requiring programming. The unit uses a female connector, male terminals, and a black bolt-on housing for a direct-fit service replacement.

This part cross-references OE numbers 15-73543 and 15845093 for the same application. For buyers searching for a 2007-2009 Chevrolet Trailblazer HVAC control module, 2007-2009 GMC Envoy climate control module, or 2007 Buick Rainier automatic air conditioning control replacement, part number 599-020 is the relevant service part to compare.

What It Helps Fix

  • Climate controls that no longer respond
  • Automatic temperature control faults
  • Loss of HVAC function at the dash control panel
  • Intermittent or failed air conditioning control operation
  • Replacement needs after original module electrical failure

Installation Notes and Tips

Fits 2007-2009 Chevrolet Trailblazer, front. Fits 2007-2009 Chevrolet Trailblazer, rear. Fits 2007-2009 GMC Envoy, front. Fits 2007-2009 GMC Envoy, rear. Fits 2007 Buick Rainier, front. Fits 2007 Buick Rainier, rear.

Verify connector style, terminal count, and automatic temperature control configuration before installation. This Dorman 599-020 HVAC control module installs as a bolt-on replacement and does not require programming.

Quality Assurance

This Dorman HVAC control module is fully tested before release to support reliable operation in the listed applications. Dorman replacement parts are engineered to match the original service function for straightforward repair work.

Related reading

This part fits 14 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2009ChevroletTrailblazerFrontRemanufactured automatic air conditioning controls
2009ChevroletTrailblazerRearRemanufactured automatic air conditioning controls
2009GMCEnvoyFrontRemanufactured automatic air conditioning controls
2009GMCEnvoyRearRemanufactured automatic air conditioning controls
2008ChevroletTrailblazerFrontRemanufactured automatic air conditioning controls
2008ChevroletTrailblazerRearRemanufactured automatic air conditioning controls
2008GMCEnvoyFrontRemanufactured automatic air conditioning controls
2008GMCEnvoyRearRemanufactured automatic air conditioning controls
2007BuickRainierFrontRemanufactured automatic air conditioning controls
2007BuickRainierRearRemanufactured automatic air conditioning controls
2007ChevroletTrailblazerFrontRemanufactured automatic air conditioning controls
2007ChevroletTrailblazerRearRemanufactured automatic air conditioning controls
2007GMCEnvoyFrontRemanufactured automatic air conditioning controls
2007GMCEnvoyRearRemanufactured automatic air conditioning controls
Directly replaces or cross-references 2 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
15-7354315845093