Tom LeBlanc

My 2014 Sierra crew cab 5.3L with 86,000 miles has just started to burn oil bigtime. I called GM who told me to take it to a dealer. I called a dealer who told me he was instructed to tell me that 3 quarts in 6,000 miles was normal. Really GM? After 25 yrs driving a gmc truck I am now considering changing. I dont care about the oil. I get it changed and they top off between changes for free, but what is the long term effect on the engine? I have read about the aftermarket fixes but GM needs to own this disaster and make it right. American manufacturers need to gain back some pride and do the right thing. My 86 year old dad just bought his second Nissan truck. I may be next.