My 99 Blazer seems to be all over the road. i replaced the shocks about 3 yrs ago with autozone 'premium' shocks (all 4). less than a year ago i replaced the front sway bar bushings. it's got new ball joints and upper control arm bushings. at highway speed if you hit a bump it sways like a battleship. could the autozone shocks be gone already? any other suggestions?

How many degrees do you have to move the steering wheel in order to get the car to respond? Anything more then a couple and you likely have too much slop in steering. To quickly check the tie rod ends, jack the front end off the ground and then grasp one tire at 3 and 9 o'clock, and gently try to move it back and forth. If you have any movement at all I would start looking at tie rod ends, get someone else to move it back and forth while you look at the ends to see where the slop is.

I just bought a 2000 Jimmy 4x4 70K miles, and already replaced all ball joints and now found left front bearing is loose, leaking at the short drive shaft. Is this a bad vehicle to buy? I hit bumps and feel like I am bouncing all over. I can still sell it for what I paid and am thinking to get rid of it.
any thoughts???????????

I recently had the same issue. I had play in the steering wheel, pulled to driver side on braking hard and hitting bumps. I tried what all these guys are telling you. It could be one of those issues. Just don't forget to check the idler arm on the passenger side. I connects to the steering rod and connects to the car frame. This keeps the steering rod from moving up and down.

Put car up, and move tire at 3 and 9 o'clock and move back and forth. If tie rods move up and down, check idler arm for up and down movement. If so, you should replace.