2011 sierra tire balance issue
 

2011 sierra 4x2 with 267-70-18 michelin LTX AT2 tires bad vibration at 65+ mph, had tires rebalanced and helped a little bit but still has alot of vibration.

take it back. they did a poor job. they should fix it for free.

I agree. If it still doesn't help, go to a tire store and have them do it. You'll get a better balance out of it.

You can also ask them to spin just the wheel (without the tire on it), to verify that it is still true.

^^^^ Had a similiar problem on my cummins, bent wheel but would balance up with the tire on and would vibrate. remove tire and make sure wheel isn't bent

You can also see if they have the old style balancer that works with the tire still on the vehicle. It might show a bent hub, rim or something else.