We'll I pussed out on the 2015. Test drove the v6 and honestly felt no different than the 5.3 in my 05 I just sold but just couldn't do it. Gunna pull the trigger on a 2010 Sierra crew cab tommorow with a5.3 and 37k on it tommorow. Gettin it for 24k$Sent from my iPad using SoCalJetBoats