I have had some problem recently with front end vibration on my 97 GXE. The vibration starts at about 60 mph. I have had the wheels rebalanced and the front end aligned but it has not helped. Am I looking at worn front end parts causing the problem? The cv joints are new. I do have over 150k in mileage.
Excuse me if there is something in FAQ as I have not had any luck getting any searches to work.

JWYLES

 

Both tire beads are securely mounted
The wheel is not bent or damaged
There is no buildup of dirt between the hub and the wheel
All of the lugs have been properly torqued
The wheel is securely seated on the hub
The definition of balance is the uniform distribution of mass about an axis of rotation, where the center of gravity is in the same location as the center of rotation. In English, that would translate to...A balanced tire is when the mass of the tire, when mounted on its wheel and the car's axle, is uniformly distributed around the axle. Even easier yet, how about...there are no heavy spots.

Balanced tires can be the difference between a good or bad driving experience. Some cars (and drivers) are more sensitive to an out of balance tire than others, but no one is happy with a vibration.

An out of balance tire can adversely affect ride quality, shorten the life of your tires, bearings, shocks and other suspension components. If you have a vibration that is dependent on speed, and usually becomes noticeable around 40-45 mph and increases as your speed increases, it's probably balance related. The other primary cause of vibrations is that the tire and wheel assembly isn't perfectly round. Face it, if we go out far enough past the decimal point, nothing is perfectly round. This includes your wheels and tires. The problem is when the high spot on the tire, and the high spot on the wheel end up being matched to each other. This effectively doubles the amount of "hop" or runout. If re-balancing doesn't cure the vibration problem, have your preofessional installer check the runout of the tire. If there is a "hop", many times the problem can be fixed by simply rotating the tire on the wheel slightly. The technician should loosen the tire on the wheel, and turn it 180 degrees, and reinflate the tire after relubricating the bead. The runout should be significantly reduced or eliminated, and if it's not, try it again, but this time rotate only 90 degrees, and if that doesn't work, try 180 degrees on the third try. Done this way, the high spot on the tire has been tried at each quarter of the wheel. At one of those points, the tire should be good and round. At that point, rebalance the tire, and go for a test drive. If the vibration persists, the problem is either in the tire, or elsewhere in the vehicle.

credit- TireRack.com

 

Did you check your wheel bearings?

 

Take it back to the tire shop

 

www.gsp9700.com

Get it balanced on a Hunter GSP9700.

 

Here's a checklist that applies to the Front axle/wheels/tires:

-Imbalance
-Improper installation, looseness
-Shock absorber deformation, damage or deflection
-Bushing or mounting deterioration
-Suspension looseness
-Spring fatigue
-Incorrect wheel alignment
-Wheel bearing damage
-Out of round
-Incorrect air pressure
-Uneven tire wear
-Deformation or damage
-Non-uniformity
-Incorrect tire size

The front axle, tires, and road wheel can each be the source of the vibration.
The two most likely causes across the board are imbalance or improper installation, looseness. Once my tires were really worn down I started getting steering wheel vibration so I had the tires re-balanced but that didn't help. A new set of Michelins (MXV4 PLUS, 215/55HR16 ) fixed it for me.

 

I never paid big attention to slight vibration(s) at 80 mph as I know/thought that my struts are almost done. Well, I had to buy tires and got them balanced on Hunter GSP9700 like mzmtg said in one of the earlier threads and wow! I don't feel the vibration if any at the troubling speed. Thanks dude.