Join Date: Jan 2009
Location: Surrey, BC, Canada
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Re: 1999 gmc jimmy loose steering
To check properly, you need to get the front of the truck up safely on stands, blocks in front and back of the rear wheels.
You need to take the tension off the ball joints and control arms before you can shake, push or pull.
Put a jack under the outer end of the control arms, right under the ball joint.
Jack it up until it wants to lift off the stand.
Now that the upper control arm is off the droop stop, you can grab top & bottom and push & pull.
If you detect any looseness look at the top & bottom ball joints.
At the right wheel you can grab each side and twist left & right while watching the idler arm. If it moves up & down more than a 1/4" you need to replace it.
You can also check the upper control arm bushings by pushing & pulling the top of the wheel. You can also remove the wheel so you can see easier.
Adjusting the steering box should be the last action, after you are sure that nothing else is loose.