2005 Trailblazer Ls 4WD Speed Sensor Location

What is your question?

Yesterday morning we jumped into the Trailblazer to take my wife to work. On the way the ABS and Brake lights both kicked on and then the speedometer started wigging out and the rpm’s revved high when I hit the gas, it had a loss of power on takeoff. I scanned the vehicle with an OBD2 that connects to my iPhone while driving and it brought up a code P0502 - Vehicle Speed Sensor A Low Circuit. Hoping this sensor is just dirty or is the only thing that is actually needing replaced. Where is this particular sensor located, please? Thanks

What makes this problem better or worse?

Driving

How long has your 2005 Chevrolet Trailblazer had this problem?

1 day