We are currently on a trip to Colorado with our 22 Yukon SLT 4wd with Max Tow and 5.3 currently with 1900 miles on it. Left Phoenix, AZ and headed to Payson, AZ then to Gallup, NM then to Shiprock, NM, up to Del Norte, CO, Fairplay, CO and into Littleton, CO via CO-285 so a lot of twisty road...