ABS and speed sensor fault

Hello my name is Dakota miles I have the 2004 Pontiac GTO LS1 5.7 l and for about three or four months now I have had my abs sensor fault and it kicks out my traction control my fuel gauge I am a newbie on doing my own DIY projects to my car I need help locating the sensors so I can change them out if anybody out there can help me out be greatly appreciated thank you

For 4 channel ABS - You will have a speed sensor locate at each wheel hubs. You will see the sensor harness going to the hub. They will be held in by a single bolt.

For 3 channel ABS - Only the front will have the speed sensor connect to the hubs and the third sensor is located on the center section of the differential.