First luxury new car I bought. Treated it well, drove easy. Torque converter replaced at 38K mi. Power Steering replaced at 40K mi. Oil - a quart every 2K mi. Water level sensor out at 60K mi. Fuel pump out at 60K mi. MAFE sensor intermittent at 70K mi and Radiator leak started. On Star obsoleted equipment in car and it ran down battery. Replaced battery. Dash cover turning up at corners at 90K mi even though garaged all the time. A/C blowing greasy stuff out of vents at 90K mi. Torque converter out again at 105K mi. All repair prices/parts out of sight because it's a Cadillac. My used cars all were better than this one. To think I paid $40K....
Highway driving is comfortable, highway fuel mileage is 25 MPG which is great for a heavy car.
Quality, Quality, Quality. My next car won't be GM.