GM Genuine Parts Drive Shafts are designed, engineered, and tested to rigorous standards, and are backed by General Motors. This drive shaft transmits torque and rotation to your vehicle's differential, and is used to connect components of the drive train that cannot be connected directly because of the distance between them. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).