A-NAFTULY Blower Motor Resistor Kit with Harness for 2003–2009 GM Trucks & SUVs — Direct-Fit, Restores Multi-Speed HVAC

A-NAFTULY's 15-81773 blower motor resistor kit with harness replaces the factory resistor to restore full multi-speed HVAC fan control on many 2003–2013 GM trucks and SUVs.

If your vehicle's heater or air conditioner only works on one fan speed, or the blower doesn't run at all, the blower motor resistor is a common wear item. This replacement kit from A-NAFTULY is designed as a direct-fit, OEM-compatible unit with a harness included so you can swap out the failed resistor quickly and get your ventilation system operating across all speeds again.

Which vehicles and part numbers does this kit fit?

This resistor kit fits a wide range of GM models from the early 2000s through some later years. It covers Chevrolet, GMC, Cadillac models such as Silverado, Tahoe, Suburban, Avalanche, Trailblazer, Sierra, Envoy, Yukon, Escalade, Impala, and Monte Carlo—refer to part references to confirm fit.

• Common reference numbers: 15-81773, 1581773, 89019351, 89018778 and others listed by the manufacturer.
• Compatible models include 2003–2006 Chevrolet Silverado/Tahoe/Suburban/Avalanche/Trailblazer and 2003–2009 GMC Envoy, among others.
• Always match your vehicle's part number and check the connector and mounting location before ordering.

How does this resistor kit solve fan speed problems?

The resistor controls the electrical current to the blower motor and sets the fan speeds used by your HVAC controls. When resistor coils or contacts fail, certain speeds drop out or the blower stops; replacing the resistor restores the intended speed range and reliable airflow.

• Replaces worn resistor elements that create single-speed or no-blower conditions.
• Reinstates all fan speeds—low, medium, and high—when properly installed.
• Includes harness for a stable electrical connection and reduced troubleshooting time.

Is installation difficult and what tools are required?

Installation is designed to be straightforward: the resistor is usually mounted on the lower passenger-side of the HVAC housing and secured with a few screws. Most DIYers can complete the swap using basic hand tools without special skills.

• Typical tools: screwdriver or socket set and possibly a trim tool to access the resistor location.
• Steps: disconnect vehicle battery, remove mounting screws, unplug the old resistor, plug in new harness, and secure the replacement.
• No crimping or wiring modifications are usually required when matching the OEM connector.

What warranty and quality checks come with the part?

A-NAFTULY backs this blower resistor kit with an 18-month warranty and 24/7 customer support. The kit meets or exceeds OEM fit expectations and is produced from materials and testing procedures intended to provide durable operation in the HVAC circuit.

• 18-month worry-free warranty through the A-NAFTULY store.
• Manufactured as a direct replacement for original equipment to ensure fit and function.
• Packaged with the resistor module and harness for a complete swap-out solution.

Who is this for: This blower motor resistor kit is for owners and technicians working on compatible Chevrolet, GMC, and Cadillac trucks and SUVs from the 2000s who need a reliable, direct-replacement part. It’s aimed at those who want a straightforward repair—either as a DIY project or as a parts supplier for a professional service bay—who value an OEM-style fit, included harness, and an extended warranty for peace of mind.