Dorman 599-025 HVAC Control Module - Front or Rear

HVAC Control Module for 2002 GM SUVs

Restore cabin climate control operation with this Dorman HVAC Control Module, part number 599-025. It is a fully tested replacement for the original manual HVAC control unit and is built for 2002 Chevrolet Trailblazer, Trailblazer EXT, GMC Envoy, Envoy XL, and Oldsmobile Bravada models with rear window defogger.

Key Features

• Direct replacement HVAC control module for manual climate systems
• Fully tested replacement unit for dependable operation
• No programming required
• Bolt-on mounting design with black housing
• Female connector with male pins
• 16 terminal positions and 26-pin configuration
• For vehicles equipped with rear window defogger

Product Details

Dorman 599-025 is an HVAC control module designed to replace a malfunctioning original unit in select 2002 Chevrolet Trailblazer and Trailblazer EXT, GMC Envoy and Envoy XL, and Oldsmobile Bravada applications. It is intended for manual HVAC systems and uses a bolt-on installation style with a pin-type terminal layout. Because programming is not required, replacement is straightforward once the original module is removed and the correct connector and mounting style are confirmed.

This part cross-references 15-72739 and 15076095 for the same application.

What It Helps Fix

• Climate controls that stop responding
• Loss of blower, temperature, or mode control through the panel
• Intermittent HVAC operation caused by a failing control module
• Dashboard HVAC functions that no longer communicate correctly with the system
• Rear window defogger control issues tied to the original module

Installation Notes and Tips

Verify the vehicle uses a manual HVAC control setup with rear window defogger before ordering. Confirm connector style, terminal count, and mounting type against the original module to ensure proper replacement. No instruction manual is included, so compare the original unit and vehicle configuration before installation. Fits 2002 Chevrolet Trailblazer, front. Fits 2002 Chevrolet Trailblazer, rear. Fits 2002 Chevrolet Trailblazer EXT, front. Fits 2002 Chevrolet Trailblazer EXT, rear. Fits 2002 GMC Envoy, front. Fits 2002 GMC Envoy, rear. Fits 2002 GMC Envoy XL, front. Fits 2002 GMC Envoy XL, rear. Fits 2002 Oldsmobile Bravada, front. Fits 2002 Oldsmobile Bravada, rear.

Quality Assurance

Dorman replacement parts are engineered to match the original function of the failed component and are fully tested before release. Part number 599-025 is built as a direct-fit replacement for the listed applications.