2015 Yukon Denali won't start
My 2015 yukon Denali won't start. No lights are on, not even security lights, no turn over, no noise-
just completely dead. My husband checked the battery with his tool that detects power (I know
nothing about cars), but my husband is very handy when it comes to this stuff. However he seems
pretty stumped at the moment. He only did quick check of some stuff under the hood and then
had to go to work. Any ideas?