We bought our 2015 Yukon Denali last year about this time. Certified and good to go. After the first 6 months we noticed the breaks were wobbly when slowing down. Asked to have them checked and fixed. As per service guy “they were fine” so nothing was done. Oil change, tire rotate checked and done ? Problem with breaking continued but we were told it was fine so at the next oil change I asked them to check breaks and find out why it’s wobbling when breaking. Well now, now that we are 2000 miles out of warranty , our rotors are worn and needed fixing. But not when we were still in warranty. Grrrr!! Austyn, the service contact, was impeccable and very thankful for her assistance. We are very displeased with the ethics behind the warranty program.