I bought the Deville with about 35K miles, 7 years ago. The car is best on a long trip when comfort and smooth highway handling count the most. My biggest problems have been with faulty sensors -- just about all of them to include: oil pressure, engine temp, airbag, steering, tire pressure etc. The actual components were NOT at fault. In every case it was the sensor. The other problem I had (which seems to be common among owners) is the power window motor failing. The electronic switches and displays are chintzy. Anyway, the motor is great. Uses about 1 quart per 1,600 miles. All that said, it is a fun car to drive on a trip. It depreciated quickly -- so I would shy away from buying a new one in the future.
Update on 7/6/2016: Still have the Caddie and enjoy driving it, especially on road trips. Unfortunately, the latest "service engine" light came on and provided some ugly results: "replace torque converter clutch (TCC) solenoid." This is an expensive repair where the a transmission shop has to remove the transmission to replace parts. Uggh. In searching this repair among other Caddie owners, I am not alone. Many, many owners have reported the same thing. The car has just under 100K miles, has been well maintained etc. GM knows about the recurring problems and made little/no changes to address specific and expensive problems in subsequent model years (see my original comments above). No love here for this company -- sorry. I will avoid buying a caddie in the future.
I bought this car with 89000 miles on it. two weeks after it was bought the problems started. One day while driving, the battery light came and the car shut off. I replaced the battery (what the dealership told me was the ONLY problem). after the new battery it ran fine for about a month then it started again. The dealer told me nothing was wrong with it. Every time i turn on the a/c or heat the car will shut off, even when randomly driving it shuts off. The service tire monitor light came on, fixed that only for it to come back on shortly after. Love the car despite these issues but just wish the dealer would have helped more.
Very smooth ride, comfortable for all passengers, all digital gauge cluster, lots of space, overall layout of interior fittings is great.
better MPG ( despite it being a boat of a vehicle), larger turn radius, the timing of the digital gauge cluster ( takes a while for it to switch between lighter and darker modes.
To anyone with a vibration issue. You need to keep the stock Michelin Symmetry's on the car. Once I put new tires on and went to Sullivan Tire multiple times we did it. 0 to 100 MPH, no vibration. Bad experience with Caddy dealer who had to be told to replace back seat control module twice. I wrote it in the P & S agreement the AC in the back didn't work. 1) Tire's (2) Dry boots and a broken axle 3) Broken engine front mount 4) Water pump froze and wiped out all the pully system. (5) Air intake sensor problem 6) Fuel pump float sending unit gone 7) 1-20-11 back in the shop for misfire and fuel 8) Replaced pass. window regulator
OK, once I got the vibration issue fixed and took my first road trip it was perfect. Smooth quiet and fast. I guess buying a 1 owner older woman owned always serviced at the caddy dealer didn't pay off for me.
Caddy dealerships should know about never selling a top dollar used car without the stock tires. Located in Woburn MA, skimmped on a pre-sale inspection.
I have had this car 7 years, purchased new. I have had very few problems, none major. The only annoying problem is that the car has always vibrated at about 70mph. No one has been able to discover why it does this. Other than that, no complains. We have driven this car on several vacations with 700 800 miles per day. No sweat. Gas mileage is very close to EPA rating both in town and on the highway, usually 18-20 city and 24-26 highway (EPA is 18/27). The 4 valve per cylinder engine lacks good low end torque as does every such engine like this that I have driven. But, if you want to go, hang on. Comfortable, classy, reliable. What else could you want?
XM radio, headlights, big knobs on AC, Radio, etc. Very comfortable ride front and rear.
Tone down the auto leveling pump! Get the seat belts off the seats and back on the side posts.
This car has been extremely reliable and has required minimum maintenance over the years. MPG on the highway is still 25-26 driving the speed limit of 70 mph. Great car that I'm counting on reaching 250,000 miles using Mobil 1 5W30 motor oil and changing it every 3000 miles.