I am new to the site, but been on lawnsite for years. I have a 06 2500hd sierra. I just put bigger tires on it and that raised the truck two inches. When I plow the plow mount still hits the ground on little hills. Also while driving and I put the plow to one side so the engine and trans stay cool. If I don't go slow any type of bump the plow bangs on the corner of it. Is this a normal thing or I am doing something really wrong please.