steering on 1999 Chevrolet Suburban 1500

I have had the truck into the shop and they can't find a problem. the steering used to shimmy when turning toward the right at 50mph or higher now it is doing it in both directions and getting worse.

1 answer
Something must be loose in the front end and it sounds like it is getting worse. You could try a good alignment shop instead of a general repair shop. An alignment shop may be better at finding worn suspension components.