The plastic seat casing in my GMC Acadia has cracked, with no excessive wear and tear or anything that should cause a seat to just crack. I have been in contact with GMC corporate since 8/6/15 regarding my issue and concern that their is an inherent defect in the plastic/faulty manufacturing of the seat that is causing the seat to crack. My neighbor has a 2014 Denali Acadia and his seat has cracked within the first year and half (under warranty of course). My car is out of warranty, but this should not occur in a car that is a few years old. The car was purchased new. Our local dealership has said that they see this problem frequently and that it is a problem. GMC corporate has been very slow to resolve this. The representative I have dealt with says they are going to replace the seat, but continues to give me the run around. I have asked for a supervisor, and it always seems a supervisor is unavailable or nonexistent. I am extremely frustrated and feel that GMC should stand behind their products and take responsibility for a faulty design that is causing the seats to crack. If a brand new seat is cracking, than clearly there is a design flaw in the manufacturing of the seat, or an issue with the plastic they are using. There is a reason the dash boards cracked, resulting in a recall and I feel if this was looked at more closely GMC would have a similar issue with their seats cracking. I am extremely frustrated 2 months later, and the lack of customer service. The representative I am dealing with is constantly not returning phone calls and I have had it!