05 Sierra

Around 40mph - 50mph I get, what I can only describe as wheel hop in the front end. It's almost like riding on those rumble strips on the side of the highway. If I give it a little gas or let off the gas it stops. It seems to happen when I'm going up an incline.

I took it to the service dept but they said they couldn't find anything, rebalanced my tires and sent me on my way.

Any thoughts?

Welcome to AF, very tough to pin this down with a road test and on site inspection, possible u joints.

Rotate your tires front to back and see if the problem goes away, I think you have a defective tire.