i have a 97 gmc sierra 5.0 4x4 and i just lifted it and i put 35" tires on it, and when i pull my boat it strugals with it and befor when it was stock i dident even feel the truck strugaling. i wanted 2 no what gears to put on in. :smokin:

If you have stock 3.73:1 gears in your truck now, you will want to go to 4.10:1 gears with your 35's. I will help a lot with towing, accelleration and gas mileage in town.