Usage Tips:[FEATURES] - The AC Blower Control Module Mainly Controls the Speed of the Blower. If the Blower Motor Resistor is good, the Speed of the Blower is the same in Different Gears. After the Blower Motor Resistor is Broken, the Air Volume Control Knob Loses its Speed Control Function. [IMPORTANCE] - Blower Motor Resistor is an Important Component in the Car Air Conditioning System. This Component is also in the air Conditioning System-a Very Easy to Damage Component. Whether it is Cooling or Heating, Automobile air Conditioners are Inseparable from Blowers. [CHECK] - Check Whether there is any Abnormal Noise During Work, whether there is any Foreign Matter Blocking the Blade or Touching other Parts; then turn the Speed Control Switch from Low Gear to High Gear to Check Whether the Air Volume Blown out has Changed. If there is no Change, It may be the Blower Motor Resistor is Damaged and Should be Replaced. [DAILY PROTECTION] - When Cleaning the Air-Conditioning System at Ordinary Times, do not use some Inferior Foam Cleaning Agents, which will Damage the Blower. There is a Bearing in the Blower. If the Bearing Lacks Lubrication, there will be Abnormal Noise when the Blower is Running. Other Part Number: 4P1516,52413530 ,89018778 19260762,93803636,52413530 52409643,20340,15-80567,52495874 Fitment: for 2004-2007 for ESCALADE 2003-2006 for 1500 2500 2003-2006 for 1500 2500 2003-2006 for 1500 2500 3500 CLASSIC 2007 for 1500 2500 3500 2003-2006 for 2003-2006 for TRAILBLAZER 2003-2008 for ENVOY 2003-2009 for 1500 2003-2006 for 1500 3500 CLASSIC 2007 for 2500 3500 2003-2006 for 2003-2006 for XL 1500 2003-2006 Colour:Black Material:ABS Package Contents: 1 x Blower Motor Resistor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.