07 H3 Shakes on highway at 65+ mph, normal?

[Hummer3]

I have heard carmax is a good place for customer satisfaction.....

have them drive it and feel the problem......then ask them if they should be selling something with that problem.....

[amyandmark3]

Thanks again for the comments fellas. I will give my Carmax salesman a call tomorrow to see what he can do for me. addict, not sure about the tbars, but here's a couple more views:

[Hummer3]

Looks like stock height.....

You also might check the tire pressure....they look over inflated....

[HUMTECH]

Maybe a dumb question, what is the local speed limits, if they dont have a highway close by to roadtest at 65mph legally they wont therefore wont feel the vibration. I know I can possibly lose my job if a customer complains of an issue above any legal speed limits and i go try to verify it on a roadtest. So onto the problem, is the shake in the steering wheel? Feel it in the seat of your pants? Braking?

[amyandmark3]

Humtech, there is a highway (I-69) within a few miles of the Carmax where the speed limit is 65 mph. The shake is in the seat. It is pretty non-existent up until 60 mph, is at it's worst between 65-70 mph, and isn't quite as bad at 75 mph. We don't drive over 75 mph, and generally stay in the 65-70 mph range. We do have a highway by our house (I-74) where the speed limit is 70 mph, so these speeds are pretty common for us, have never had any police issues for going 70-75 mph. BTW, no shake during braking.

[HUMTECH]

Sounds like a seperated rear tire. Hard to say without driving it

[amyandmark3]

Quick update: Talked with my sales rep. today and he says they will take care of it. I have to drop the H3 off this afternoon and HOPEFULLY it will be fixed by tomorrow. Thanks again to everyone for your comments, info, and warm welcome.

Mark