Transfer Case Shift Motor is a part of some vehicle' s four-wheel drive (4WD) system and is responsible for switching between the vehicle's different two and four-wheel drive options. It is a small electric motor that moves parts within the transfer case itself to activate the various modes of the 4WD system. If your transfer case motor is not functioning, then you may not be able to shift into or out of 4WD, which could be a big problem. Therefore, getting it replaced quickly is vital. Transfer case shift motor can fail for a number of reasons. Due to its location underneath the body of the vehicle, it can suffer corrosion 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. This Transfer Case Encoder Motor Fits for the Following Vehicles: 2007 Chevy Avalanche, 2003-2006 Chevy Avalanche 1500, 2003-2007 Chevy Silverado 1500, 2005-2006 Chevy Silverado 1500 HD, 2003-2004 Chevy Silverado 2500, 2003-2006 Chevy Silverado 2500 HD, 2007 Chevy Silverado 2500 HD Classic, 2003-2007 Chevy Suburban 1500 & 2500, 2003-2007 Chevy Tahoe, 2003-2007 GMC Sierra 1500, 2003-2007 GMC Yukon XL 2500, 2003-2007 Cadillac Escalade, ESV, EXT, 2006-2010 Dodge Ram 1500 and see more vehicles. Customers can find the product you need accurately according to the OE number. OE part number: 19125571, 600910, 600-910, 88962314, 19125640, 5170543AA. ATTENTION: Refer to the appropriate shop manual for your vehicle to obtain specific service procedures for this parts. Pay special attention to all cautions and warnings included in the shop manual. Please Read Before Installation! - Do not apply electrical power to Transfer Case Motor before installation on vehicle. If shafts do not align, manually adjust the shaft of the vehicle transfer case only. Do not change the position of the Transfer Case Motor output shaft before installation. 4WD Transfer Case Shift Encoder Motor - Compatible with Chevy, GMC & Cadillac Vehicles - Silverado, Tahoe, Avalanche, Suburban, Ram 1500, 2500, Sierra, Yukon XL - Replaces 19125571, 600910, 88962314