2007 Gmc Yukon Slt 5.3

[bdonnelli]

Vibration I own a 07 GMC Yukon 5.3 SLT which now has 47,000 mile on it and for the last 2 months I have been feeling a vibration in foot pedals steering wheel and at times is so strong on the highway that while sitting if I were to talk it would change the pitch of my voice with the vibration it creates even in the seat. It is not consistent. It can happen for a few days and for short periods of time and then cease for a week at a time. The dealer has replaced rotor's balanced tires and has had no effect on the condition. My fear is it is doing alot of damage what ever it is being undetected. To shake this vehicle so bad while during highway driving, it my beleif that something is out of balance with something in the drivetrain. It has never been used for off road all or 95% highway. 5% city. Please help with my frustration.

[cammiller]

Does it change in 4WD? while turning, how much tread is left on the tires. Does the vibration seem to follow road speed or engine speed?