do you have the 6l80e?

i have 35x1150 on my 2010 now still with stock gearing. I pull an enclosed trailer in the hills of PA with no issues. It actually cruises better with the bigger tires. If using the 4l60 its more of a issue but the gearing of the 6l80 really seems to help out. swapping the gears might not be something you want to do untill you test drive truck for a while.