A-Premium Front HVAC Blower Motor Resistor for GM Trucks & SUVs — 5‑Pin with Wire Harness (Automatic Temperature Control)

A-Premium's front HVAC blower motor resistor restores precise fan-speed control for compatible GM vehicles with Automatic Temperature Control.

This five-pin blower motor resistor and matching wire harness replace worn or failed resistors in many Chevrolet, GMC, Cadillac, Buick, Pontiac, Oldsmobile and Isuzu models. Designed as a direct-fit aftermarket replacement, the part matches common reference numbers and fits vehicles equipped with Automatic Temperature Control only. The assembly is intended to deliver reliable blower function across the full range of fan speeds when installed correctly.

Which vehicles will this A-Premium resistor fit?

The resistor fits a wide set of GM-platform cars, trucks and SUVs spanning late 1990s through the 2000s. It includes many Silverado, Sierra, Tahoe, Suburban, Yukon, Avalanche, Trailblazer, Envoy and comparable models from Buick, Cadillac, Pontiac, Oldsmobile and Saab. Always confirm fitment by matching your original part number or adding your vehicle to an online garage tool before ordering.

• Chevrolet Silverado 1500, 2500, 3500 (selected years 1999–2007)
• GMC Sierra 1500, 2500, 3500 and Yukon/Yukon XL (selected years 1999–2007)
• Cadillac Escalade, Buick LaCrosse/Allure, Pontiac Grand Prix, Saab 9-7x, Isuzu Ascender, Oldsmobile Bravada
• Fits models using Automatic Temperature Control only; verify against reference numbers (e.g., 973-508, RU-631, 89018778)

How does this replacement part behave compared with the original?

A-Premium supplies a direct-replacement resistor module engineered to match the electrical and mechanical interface of the factory part. The kit includes a 5-pin resistor and a dedicated wire harness to simplify installation and restore the multiple blower speed steps. Quality control focuses on fit and connector alignment to minimize modifications during swap-in.

• 5-pin resistor design mirrors factory connector layout
• Included wire harness reduces splicing and wiring errors
• Intended to reproduce original fan-speed steps for Automatic Temperature Control systems

What should I check before buying and installing?

Confirm your vehicle's HVAC uses Automatic Temperature Control and that the part reference matches your original resistor. Inspect the plug, pin count and the physical mounting location to ensure the supplied unit will install without alteration. If unsure, compare reference numbers or consult the vehicle's parts diagram before purchase.

• Verify part numbers: 973-508, RU-631, 89018778, JA1639, 89018653
• Confirm 5-pin connector and Automatic Temperature Control compatibility
• Check the original resistor location and connector orientation before ordering

What comes with the A-Premium blower resistor and what warranty applies?

The package contains one 5-pin blower motor resistor and a matching wire harness—everything needed for a direct replacement in compatible vehicles. A-Premium backs the component with a one-year unlimited-mileage guarantee to cover manufacturing defects under normal use, giving buyers added confidence after installation.

• Includes: 1x 5-pin blower motor resistor and 1x wire harness
• Warranty: one-year unlimited-mileage guarantee from A-Premium
• Sold as aftermarket direct-replacement; professional installation recommended if unsure

Who is this for: This A-Premium blower motor resistor is aimed at owners and mechanics restoring HVAC fan-speed function in GM vehicles from the late 1990s through the 2000s that use Automatic Temperature Control. It’s suitable for DIYers comfortable with basic electrical swaps and professional technicians seeking a reliable, direct-fit replacement backed by a one-year warranty.