GM-50618-A removes and installs the ABS wheel speed sensor rotor on LCF MD trucks. The WSS rotor must be removed to separate the brake rotor from the hub during brake service. There are two types of WSS rotor used: sintered and stamped, depending on the year of the truck. GM-50618_A includes a reaction plate and small puller (GM-25031-A) to remove the stamped rotor. The reaction plate is used with commonly available pullers to remove the sintered rotor. The installer is used with the included driver handle (GM-8092) to seat both rotor types