I have a 2000 Blazer 2wd and the other day out of the blue it started having a vibration or a clicking type of feeling out of the front end. I check the wheel bearings and usual suspects and all is fine. It only really happens when I get above 35 mph. It does not get worse the faster you go so I have really no idea what it could be. I tightened things I could and greased what needed it but to no avail. It sends the vibration or clicking feeling up into the steering wheel. I hope someone can advise what to check for because its driving me nuts.

 

Get your tires rotated and balanced. Tire balancing along with irregular tire wear do some weird things. Does it click when turning? Also check for movement in the centerlink and idler arm. I had a similar vibration and it ended up being that whoever replaced the idler arm before me didnt use lock washers and the dang thing was hanging off the frame. Doubt it would be the same for you but always start with the tires!!!