For those of you with a slight rattle coming from under the dash, the column lock out rod will rattle on the drivers side header, rear most tube. It will only touch when in drive. If you have a slight rattle, put the car in gear (with the car safely braked of course) and reach down by the steering column (engine compartment side) and wiggle the lock-out rod that comes out of the steering column. It will contact the drivers side rear header tube, which will transfere a rattle right up the steering column. Easy fix: Use a light duty throttle return spring from an auto parts store or even a hardware store. Then wrap one end around the lock out rod (it is also the shifter rod on column shift cars) and then drill a small hole in the plastic inner fender at the wheek opening and put a light tension on the spring to pull it away from the header tube. In park, the rod is a mile away, but in gear, it will hit. Most Turbo Buicks have this condition.