Restore precise cabin temperature management in your 1999-2004 Chevrolet Blazer, S10, or Sonoma with this OEM GM climate control module, built to part number 16250545. Engineered for the GMT400 chassis, this climate control head unit directly replaces degraded dial assemblies and cracked circuit boards that typically trigger uneven cabin airflow, persistent defrost errors, or sudden HVAC shutdowns.

Direct Dashboard Integration

This replacement climate control assembly mounts into the original console opening without trimming or bracket fabrication. It interfaces directly with your vehicle’s existing blower motor resistor pack, A/C compressor clutch relay, and cabin temperature blend door stepper motors. The molded rotary controls and slide switches maintain exact factory travel distance and spring tension, preserving the tactile feel and electrical continuity required for proper voltage signaling.

Drops in as a direct replacement for GM part number 16250545
Engineered for 1999 through 2004 Chevrolet Blazer and S10 production cycles
Matches Sonoma chassis HVAC routing and dashboard cutout dimensions

Each unit undergoes bench verification to confirm uncorrupted solder joints and reliable pin contact across the primary wiring harness connector. Reinstallation follows factory procedure: detach the lower bezel panel, unscrew the four retaining fasteners, unplug the multi-port cable, and seat the new module into the track guides. After reconnecting the harness and securing the fasteners, the climate system regains full manual override of temperature mixing, fan speed stages, and directional vent assignment.

Compare the eight-digit casting imprint on your existing control faceplate against this listing before proceeding. Selecting the verified OEM specification ensures consistent communication with your truck or SUV’s engine control module and prevents aftermarket diagnostic trouble codes related to HVAC resistance mismatches.

Country/Region

Country/Region

Your cart is empty

1999 2004 Chevrolet Blazer S10 Sonoma Heater Climate Control 16250545 Used

1999 2004 Chevrolet Blazer S10 Sonoma Heater Climate Control 16250545 Used

You may also like

Windshield Wiper Switch Replacement For Honda Civic Acura Integra 1996 1999

Dorman 599 210 HVAC Control Module Front Rear Fits Gmc Cadillac Chevrolet

2003 2008 Honda Pilot LH Driver Side OEM Window Control Module

Mopar Turn Signal Flasher Relay Module 4686094 Dodge Jeep Chrysler 1996-2000

Make An Offer

1999 2004 Chevrolet Blazer S10 Sonoma Heater Climate Control 16250545 Used

$200.00

1999 2004 Chevrolet Blazer S10 Sonoma Heater Climate Control 16250545 Used

$200.00