For Astro and Safari models from 1996 to 2005 with V6 4.3L engines, this blower motor resistor is designed to regulate fan speed for the heating and air conditioning system.It replaces 89018436 and fits directly into the existing HVAC housing.The unit is constructed to meet specifications for and consistent performance.Installation is straightforward, using the mounting points and electrical connectors.This resistor is intended for use in vehicles equipped with the specified engine and model configuration.Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.