General description This AC Blower Motor Control Module Resistor is designed to regulate the fan speed in your vehicle's AC and heating system. If your air conditioner is not blowing air or you cannot adjust the airflow, it may be time to replace the blower motor. This module is a direct replacement for various models, ensuring compatibility and ease of installation. Technical specifications Type: AC Blower Motor Resistor Part Numbers: 52409643, 52413530, 93803636, 89018778, MT1805, RU-631, JA1639 Material: Plastic and metal Color: Silver and black Measurement allowed error: +/- 1-3 cm Compatibility and accessories Fits models from 2003 to 2006 including: Escalade, Escalade ESV, Escalade EXT 1500, 2500, 3500 series SUVs: Trailblazer, Envoy, Envoy XL, Envoy XUV Other vehicles: Ascender, Bravada, 9-7x Installation To install the blower motor resistor, follow these steps: Remove the screws securing the blower motor. Unplug the electrical connector. Remove the heater control relay