2000 blazer sounds lik abs when i hit a bump

i have a 2000 blazer i have pulled the fuse on my blazer because the front sensor is bad however when i hit a bump its sound like it is engaging in the rear of the truck i do not fell it on the petal i do hear somthing rattling but when i pulled the tire thier is nothing loose that i can see i havnt got a clue

Welcome to AF!

Have the universal joints ever been inspected?. How are the rear brakes? Is there anything loose/binding, such as the emergency brake shoe. the rear calipers have a tendency to sieze up and can be slightly grabbing, which kind of feels like the ABS going off.