I think it's a 5.4. Plenty of horsepower. Towed well, just a little wagging when eighteen wheelers passed us. Ours is a 2012. They made a tow package for those years that added a lower gear and a transmission fluid cooler. Ours did not have those. I bought an auxiliary transmission cooler, but never installed because I bought the F250. Trans temps got to the 220 range at times. The 3.08 gears also kept it from getting into OD. If you're gonna tow with it, I'd suggest getting the Suburban, longer wheelbase, and make sure it has the tow package with gears and cooler.
2012 Chevrolet Tahoe
2014 Grey Wolf 26DBH