I'm looking at buy a full size 2007 and up Chevy SUV, Suburban Ltz, Cadillac escalade esv or Yukon Denali xl. I know that the suburban change the trans to a 6 speed and Chevy cylinder deactivation in 2009. did the other SUV make and major changes in the later years to improve? Wiki and Google is not helping.what year did they add the cylinder deactivation to the 6.2.When I was looking on wiki, the escalade MY10 had it. I have no idea what year is. I couldn't find any info about the Denali.I wish there was a good website that showed you the difference/upgrades to each year
