GM Genuine Parts Axle Shaft Seals are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These sensors measure your vehicle's steering wheel position angle and rate of turn, helping optimize steering and braking performance. 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).