Originally Posted by Ham Camper
I bought a 2015 GMC Denali HD, 3/4 ton, and the book calls for different air in the rear tires than in the front. Do people put more air in the rear tires for when they are towing? Or is this something that is done regularly. People I have asked said they run with the same air in front as in back no matter whether they are towing or not.
I am glad you read the tire sticker in the door jam to see that pick ups have a different pressure for ft and rear. No you should NOT run the same pressure when towing (unless the trailer is that light to you truck it does not matter) BUT VERY FEW DO THIS, so you are correct you run a higher amount in the rears when towing, Most gm. models are 50/55 fronts, and 80 rears. Now if you are towing a tag type trailer you might need to adjust the rear tire pressure as the tough weight might not need to much, but only time and driving will tell you that.
And yes you need to then take the air out when you are not towing for a length of time (the center of the tire will wear out quickly) and then just air them back up when you need to tow again.
Hope this helps you out and Happy Camping