Originally posted by Powerbook G5
My dad's Malibu would always shake above 90 and when braking from speeds over 60. Taking it to Tire Kingdom for a full align/balance did help a lot, but it still did shake still when you hit it's max speed of 106.
If it shakes when you hit the brakes then you have warped rotors and either need them turned or replaced. Sometimes bad calipers can create the same sensation. If a piston is sticking on a brake caliper then it over heats the rotor causing it to warp a little. The rotor isn't always damaged by this but to be on the safe side the calipers and rotors should both be looked at in this situation.