paint coming off 05 duramax

[R0LLDAMTIDE]

hey guys, just wondering if any of you bought a duramax in 05 and if it still has paint on the roof..... as you might guess, mine does not. GM wont do anything about it and i think its b#llsh!t! i would think the paint should last 5 years at least til its paid for!! do any of you know of any recourse to get this fixed? GM pretty much said good luck with that.... it only has 62000 miles and always garaged, can this be normal???????