HELP! 2000 Blazer with vibration

[blazer2000]

I had new tires put on in Feb. The last part of April I suddenly had a vibration when you hit 60 to 70 mph. I took it back to the tire place and they found 1 tire had a slight defect, so they gave me 2 new tires, balanced and rotated them. It still had the vibration. Took it to the dealer, they said it was in the tires. Took it back to the tire place, they put the best tires made on it, and it still does it! Any suggestions? Thanks. Oh, it has 52,000 miles and I am the only owner. The dealership and the tire place checked the wheels and brakes and they are fine.

[guzzigreg]

Check for worn or loose front end parts. But my experience with high speed vibration has always been either wheel dinged or more likely poor tyre balance.

[blazer2000]

This seems to be in the rear of the vehicle. The tires have been balanced several times, new and different style tires put on, and the wheels checked by both the tire store and the dealership.

[roadieken]

Originally Posted by blazer2000

This seems to be in the rear of the vehicle. The tires have been balanced several times, new and different style tires put on, and the wheels checked by both the tire store and the dealership.

You may want to have your universal joints checked. I just replaced mine after 170,000 miles (OOPS!) and the rear end vibration I had is gone.

[blazer2000]

Thanks, I'm taking it to the dealership on Wed. I'll have them check it out.

[clineger]

Does the vibration cycle every 15 to 20 seconds. Meaning that it gets worse and more noticable, then settles down, then worse and more noticable, then settles down, then worse and more noticable, then settles down - every 15 to 20 seconds.

[blazer2000]

Originally Posted by clineger

Does the vibration cycle every 15 to 20 seconds. Meaning that it gets worse and more noticable, then settles down, then worse and more noticable, then settles down, then worse and more noticable, then settles down - every 15 to 20 seconds.

I'll have to let you know when I get it back tomorrow. It's been at the dealer since last Wed. and they can't find it. Thank goodness they aren't charging me! They have taken things off of a new 2004 and put them on mine and it still does it. If it does what you are asking, what do you think it is?
Thanks!

[cobra1]

have the motor mounts been checked?

[incubus4163]

you sure its not the bearing? i just replaced both of mine in the front

[gsapp24]

I have the same problem with my 2000 blazer the dealership and tire shop never could find out what was wrong....go figure....hope ya find something out

[BlazerLT]

Any update?

[nerve_agent]

I'm having the same problem. Had a total of 6 tires put on. Idler is junk after 7 months (since i had it first changed out) thank god the ball joints are still intact ( crossing fingers). Monday I'm having the idler arm redone at only the cost for 1 hours labor then if they find anything else im going to head straight for the dealership. Thanx for the idea to check the universal. Possible shock problem too. Will update as soon as I find something with mine.

[JParrott]

If you guys ever figure this one out PLEASE post the results. I've chased this thing for the better part of a year now. Vibration starting around 60 mph to 70 mph. Everywhere else is fine. U-joints fine. All front end components good. Torsion bars are good. Shocks fine. Tires balanced with no defects. Kelly Chargers/stock size. I am at wits end with it. I either drive 55 or 75+. Smooth as silk then.

[BlazerLT]

This is indeed a tire problem.

Wheel balancing does not account for imperfection in the tire or uneven wearing.

[Hunter1]

I am having a similar problem with my 96'. Could bad Tie rods produce this? I have replaced my outers and the idler arm but it still does it sometimes. The other problem is the parts are expensive and I don't like to spend money needlessly. I have bal. rotated, and alined so many times my fingers hurt from counting (good thing Just Tires has a 6mo warrenty). Would U-joints only effect the rear?