The transfer case shift motor is a part of the transfer case that allows the vehicle to switch into and out of four-wheel drive. It is a small electric motor that moves parts within the transfer case itself to activate the modes of the 4WD system.Four-wheel drive allows all four wheels of a vehicle to receive power from the engine. This helps with traction, and is commonly used in wet, , off-road, or elevated areas. Customers can find the product you need accurately according to the number. Replace Part Number:5170543AA, 19125571, 600910, 600-910, 88962314, 19125640, 12384980, 12584314. Due to the transfer case shift motor is located on underneath the body of the vehicle, it can suffer from road salt or dirt (especially if you take the vehicle off road frequently). The motor can also get damaged from road debris, as well as simply wear out and over time.If your transfer case motor is not functioning, then you may not be to shift into or out of 4WD, which could be a big problem. Part Name:Transfer Case Shift Motor Encoder For 2003-2007 1500 Replaces:600-910 5170543AA 420-00138 12384980 12584314 88962314 19125571 19125640 12384980 Terminal Type:7 Pins Fit the Vehicels models with for NVG246 Transfer Case, code NP8 Only Fitment: for 2003-2007 Escalade, ESV, EXT for 2007 for 2003-2006 1500, 2500 for 2003-2007 1500 for 2003-2006 1500 HD for 2003-2004 2500 for 2003-2006 2500 HD for 2003-2007 1500, 2500 for 2003-2007 for 2006-2010 Ram 1500 for 2007 Ram 2500 for 2003-2007 1500 for 2003-2006 1500 HD for 2003-2004 Sierra 2500, 2500 HD for 2003-2007 , XL 1500 4WD, XL 2500 Colour:Silver & Black Material:ABS Package Contents: 1 x Transfer Case Shift Motor 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.