General Motors

I have owned my 2015 Chevy Silverado 1500 4x4 sense its had 5 miles on it. It has been in for numerous problems however at 36000 miles it started getting a real bad vibration and noticed the brakes shook really bad at highway speeds. Sense the i have had the front and rear pads and rotors replaced twice and now at 47000 miles. so within 11000 miles ive had front and backs replaced twice. I have a little over 2000 miles on the new set of brakes and been getting highway speed vibrations, take it to the dealer to have all my tires checked thinking i have a bad or out of balance tire, nope the dealer says my front rubber brakes lines are defective and are sending debris into my calipers which is causing my calipers to stick and worping my rotors and that i need a complete brake replacement, my truck is still under warranty and a defective gm part is causing my brakes to fail. GM will not respond on fixing this problem. the dealer wants almost $1000 just to do the fronts but my fear now is is that the debri has gone through my entire brake system and also has damaged my wheel bearings and transmission due to the heat and restriction. I as a consumer am outraged that GM WILL NOT CALL OR RESPOND, I did talk to avery nice lady at their HQ in detroit that seemed like they would help but now I am out of a vehicle do to defective gm brake lines. This truck has also been in for transmission problems that the dealer say yes we know what the problem is but will not fix it because itll just do the same thing, has been in 4 times for the trans, 6 times over exhaust problem that they not repair, 7 times for problems in the tailgate. I dont know where to go from here