✓Attention: Before buying, please be sure to check the appearance of the blower resistor on your car and whether OE part number is the same as the blower resistor you bought! Because the same vehicle model has 4 resistors with completely different appearance and OE
✓Manual AC Control: This AC blower motor resistor you selected is a resistor module for manual ac control
✓Application For Chevy: 2003-2006 Avalanche 1500, 2003-2006 Avalanche 2500, 2003-2006 Silverado 1500, 2003-2006 Silverado 1500HD, 2003-2004 Silverado 2500, 2003-2006 Silverado 2500HD, 2003-2006 Silverado 3500, 2003-2006 Suburban 1500, 2003-2006 Suburban 2500, 2003-2006 Tahoe
✓Application For GMC: 2003-2006 Sierra 1500, 2003-2006 Sierra 1500HD, 2003-2006 Sierra 2500, 2003-2006 Sierra 2500HD, 2003-2006 Sierra 3500, 2003-2006 Yukon, 2003-2006 Yukon XL 1500, 2003-2006 Yukon XL 2500
✓Application For Cadillac: 2003-2006 Escalade ESV, 2003-2006 Escalade EXT
✓Replace OE Number: 89019088, 973-405, 973405, 15-81086, 22807123, 1580582, 1581086, 89018308, 89018596, RU571, JA1582, 4P1449. Do check your car model in the ""amazonconfirmedfit"" in the top left corner before ordering
✓Working Principle: The blower motor resistor is an important component in an automotive heating,ventilation and air conditioning systerm. The ac blower motor resistor is responsible for controlling the blower motor speed. When you adjust the speed of the fan in the car, you are actually adjusting the current that the a/c blower motor resistor allows to reach the fan motor. The higher the fan speed setting, the greater the electrical flow allowed through, and the faster the fan motor speed