Headlights problems of the 2015 Chevrolet Suburban

Purchased a 2015 Suburban new from jim ellis Chevrolet. At about year 3 of ownership, just after warranty expiration, I noticed moisture in drivers side headlight assembly. About a year later the blinker stopped working. The only way to repair it is to install an entire new assembly. The part is $1,200 alone. The is not a warranty issue, but a defect that chevy will not address or admit. It is also a major safety issue. Additionally, the paint on the hood and roof started failing at about year 4. Again, another defect. Chevrolet will not address either of them. One is a safety issue, the other cosmetic. Very frustrated.