Car snakes extremely bad around 45 to 70 mph so bad it shakes the entire car like my wheels are loose or bent and so I bought 4 new wheels and got alignment no help did research and learned that it is due to type of torque converter in the car is a bad brand that messes up a lot and that GM hasn't acknowledged the issue which is such a shame and a sham that I hate they are doing because it is an expensive fix and I have to foot the bill plus bushing are low grade in front end and you would think be high end vehicle should be high end parts happened first on highway and has progressively gotten worse

- Commerce, GA, USA

Drive train cradle has weakened significantly from rust. While driving there is a looseness of the suspension felt and a shifting evident when accelerating and decelerating. I reside in Minnesota and the D.O.T. uses salt on the roads during the winter season and this has significantly accelerated corrosion of vehicles and their exposed components. Materials used for critical components on vehicles must withstand this factor or lives may be lost due to this corrosion, failure of the sub-frame cradle will be catastrophic loss of vehicle control. Help... the manufacturer should recall these vehicles and replace such a major component with a resistant component. Vehicle has been parked now since 2008 when this issue had been discovered. Beautiful car and I'd like the sub=frame replaced, only that component needed to enable roadability. Photo/S of degradation upon request.

- Brooklyn Park, MN, USA

Engine cradle/frame is severely degrading structurally due to the northern states practices of salting/sanding roads during the winter months. The integrity of the sub-frame steel structure is such that normal use of the vehicle, its suspension, steering and drive train stability has been compromised. The manufactures use of substandard metals in its sub-frames is the reason for this vehicles instability issues. The vehicle has now been parked for the last 4 years for fear of a potential hazardous outcome, related to the drive-train frame instability, which may cause injury to not only the occupants of the vehicle but also anyone else sharing the road.

- Brooklyn Park, MN, USA

Diagnostic check results: Random mix-fire (tune up) secondary air injection evaporative emission sensor (pressure in tank) torque converter clutch solenoid (inside transmission) engine metal over temp. Strut & maintenance traction control light remains on.

- Detroit, MI, USA

I have major problems with vibration on Cadillac Seville sts while driving between between 50 and 75 mph and no GM dealer could fix this problem. This is a major defect with the car and GM has not done anything about it, I started having backache because of this problem also check this website a lot of Cadillac owners are complaining of the same problem. www.carsurvey.org/viewcomments_review_19040.html

- Abudhabi, 00, USA

I own a 2002 Cadillac Seville, model sts that has excessive vibration at speeds in excess of 60 mph. I have had the vehicle serviced seven times at two dealerships. Three sets of tires have been replaced as well as other suspension components to no effect.

- Seabrook, NH, USA

Theres is a vibration when traveling at 60 mph and higher. Dealer has been contacted, and could not not correct the problem.

- Noblesville, IN, USA

Car vibrates 60 to 70 mph. Dealer cannot fix problem.

- Boothwyn, PA, USA

While traveling vehicle vibrated. Vehicle was serviced, and technician noticed that suspension needed to be replaced.

- Boothwin, PA, USA