The hardest part is removing the heavy seat from the car. It's definitely doable if you have patience and take your time. I removed my lower leather seat cover with the seat in the car to install a new foam cushion.2006-2011 Cadillac DTS Seat Back Cover 25984380 | GMPartsDirect.com
2006-2011 Cadillac DTS part # 25984380 - Seat Back Coverwww.gmpartsdirect.com
Probably a big bother to change it.