Shimmy in the front of my 2000 Lasabre

Have the front end allighned,bigger wheels change the geometry of things

Vehicle & all that has been done in detail Please!!

It is more likely you have a defective tire, shimmy is not the symptom of loose front end parts in this model. Most tire shops can drive this and give you a preliminary diagnosis and repair cost free of charge.

Take the car back and have the tires re-balanced. Also have the front brake rotors checked to see if they are warped. If your front rotors are warped it will give you a shimmying effect when you apply the brakes coming to a stop. If they are warped you can either have them "turned" to bring them true again, but sometimes the rotors are inexpensive enough to just replace because even though you turn them there is a chance they will warp again in a few days.

Check for bad front end parts,like a tie rod end,and have a alignment done.

This sounds like tie rod ends are going out. Before you remove the old ones, mark on the threads where it currently is seated or you will throw it out of alingment when you put new ones on. You may need to borrow or buy the tool for poping out the tie rod end. They aren't a big deal to change if you have some basic tools and sometimes you don't need the wedge tool either. Once you get the old one out, try moving it around. If it is real loose and moves easily, thats your problem. But the swaying you are describing sound like this is the problem. Could be you steering control arms as well but because the inside of the tires are worn I doubt it.

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Alignment has alot to do with the tires not shimmying.. Like zero toe setting. Loose componants like tie rod ends and the idler ar worn. You can ck for excess front end play by holding the front and back of the wheel and pushing and pulling on it, like rocking it. OR have someone rock the steering while you watch where the play is from underneath. By rocking I mean turn the steering wheel back and forth. Look at all th joints and pivot points for excess play, which is, movement not immediate to the rest of the steering system. Tire balance is very important. Wheel hop is a sign of a bad tire and it overtaxes the shock absorber. Shocks don't cause shimmy because they are a vertical movement controlA shimmy is lateral or side to side.Wheel balance weights must be spit. If a 2 oz. weight is needed to balance the tire, Oe once should be on the inside of the wheel and one ounce on the outside directly across from each outher.. Loose wheel brgs will cause shimmy, but they would not last long. Caster setting on the wheel alignment will also cause shimmy. Like on a shopping car. too much caster causes the wheel to start fluttering and is very hard on other componants. This may be why you have worn tie rod ends and a bad pitman arm. Worn control arm bushings and ball joints directly affect titre wear and can only be feltwhen the front end hits a dip and detected by side wear on the tire edges. Summary: replace the tie rod end and have the car aligned. Good Luck, -Ned_ sorry about the book

have u had your shokes check

Check front end again for any side play (small amounts at different locations can add up. Also check that steering box is not loose on frame.Check all bushings as well. If all else fails, if caster is adjustable have another degree or two put in. (positive)

not a big problem. It may be tie rod wearing. If you hear a click when turning it would be the ball joints. If it does not make clicking sound, then most likely tie rod ends or improper alignment