AA Ignition Lower HVAC Blower Motor Resistor for Cadillac, Chevrolet, GMC — Fits 2003–2006 Escalade ESV/EXT, Avalanche, Silverado

AA Ignition Lower HVAC blower motor resistor restores full fan speed control for compatible Cadillac, Chevrolet and GMC vehicles by replacing a failed lower resistor assembly.

If your HVAC blower only runs on the highest setting, is stuck at one speed, or has stopped working altogether, a failed lower blower motor resistor is often the culprit. This direct-fit AA Ignition part is engineered to match factory specifications so you can plug it in and return the heater and air conditioning fan speeds to normal operation without modification.

How will this resistor fix my blower fan speed problems?

The resistor regulates the electrical current to the blower motor across multiple fan speeds. When the resistor elements fail, some speed positions lose continuity and the fan may only run on high or not at all. Replacing the lower resistor restores the multiple-speed resistor network that controls fan velocity.

• Direct-fit, plug-and-play replacement—no cutting or wiring changes required.
• Heat-rated resistor elements built to withstand HVAC temperatures.
• Replaces common OEM numbers including 89019088, 973-405, 15-81086, 22807123.
• Recommended to inspect the blower motor while replacing the resistor for a complete repair.

Which vehicles and part numbers is this compatible with?

This lower blower motor resistor fits specific Cadillac, Chevrolet and GMC models from the early 2000s. Confirm the part number on your original resistor or check the compatibility list before ordering to ensure the correct match for your vehicle.

• Fits Cadillac Escalade ESV and Escalade EXT (2003–2006).
• Fits Chevrolet Avalanche 1500/2500 and Silverado 1500/1500 HD models (2003–2006 as listed).
• Cross-references OEM and aftermarket numbers: 89019088, 973-405, 15-81086, 22807123.
• See the full compatibility chart or verify your vehicle and part number for exact fitment.

What should I expect from the part quality and warranty?

While not an original equipment part, this resistor is manufactured to meet or exceed factory performance standards using quality materials and a factory-style harness where applicable. AA Ignition supports the part with a lifetime warranty, making it easier and less expensive than dealer replacement if the part ever fails.

• Engineered to factory-like specifications for fit and function.
• Includes heat-rated resistor elements designed for longevity.
• Lifetime warranty from AA Ignition—contact for replacement if it fails.
• Suggested simultaneous blower motor inspection to avoid repeated failures.

How difficult is installation and what tools are needed?

Installation is straightforward for anyone comfortable with basic automotive tasks. The resistor is a lower HVAC assembly designed as a direct-fit plug-and-play unit, so you typically remove a trim panel or glovebox, unplug the old resistor harness, and install the new unit.

• Basic hand tools such as a screwdriver and socket set usually required.
• No splicing or electrical modification—factory connector compatibility.
• Expect short labor time; consult vehicle service manual for access steps.
• Inspect blower motor and cabin air pathway during installation for best results.

Who is this for? This AA Ignition lower HVAC blower motor resistor is intended for owners and DIY mechanics of compatible Cadillac, Chevrolet and GMC trucks and SUVs who need a reliable, cost-effective replacement for a failed blower speed resistor. It's ideal for anyone troubleshooting intermittent fan speeds, a blower that only runs on high, or a non-functioning HVAC fan who wants a direct-fit part backed by a lifetime warranty rather than paying dealer prices. Confirm your vehicle year and the part number on your existing resistor before purchasing to guarantee proper fit and function.