96 suburban speed sensor

i need help figuring out the speed sensor on my 96 ,k1500 series,5.7,4*4,automatic..where is it located,how many are their..i couldnt find any expect one in the tranfer case i replaced that pleasssse help

it is on transfer case driver side tail where driveline goes in takes 1" socket to take out part number for autozone is su1145