Check hub assembly. I am surprised no one mentioned this. Please jack the front of the GX up. Get those wheels in the air and check them by grabbing them at the 3 and 9 o'clock position, Also grab and shake them by grabbing them at the 6 and 12 o'clock position. if you notice any kind of movement then you need to have those hub assemblies replaced. update us when you can. Thanks.

 

Well, I finally have a resolution to my vibration/shimmying problems resolved. It's been a while since I posted but I wanted to give you all an update. I was in O'Reilly's Auto Parts store and I mentioned my front end vibrating when I applied the brakes. One of the store workers suggested that it sounded like my Stabilizer Rods were bad.

So I purchased both front-end ones and replaced the next day. I test drove and was estatic that the problem was resolved. Yeah!! There is a YouTube video available for replacing these, but, it is fairly simple. The old ones were definitely worn out. After 200K miles, I'm not surprised.

 

Glad you got it fixed!

 

I would not have expected swaybar end links to affect anything under braking, but glad to hear you got it figured out!

 

go figure, I had the same complaints....saw this post, easy fix, thought I'd give it a try, easy job, longer to jack up truck and take wheel off....

 

sometimes it's caused by worn control arms. at least for my LS460.