New member as of yesterday, just thought I would make a post to introduce myself. Nissan mechanic by trade, just bought my first diesel three weeks ago. 2006 GMC 3500 lbz with a ton of miles. Bought to pull my drag car(avatar pic) and trailer. Been borrowing trucks for a year and half to pull with and figured it was time to step up and get my own truck that was big enough. Trailer is a 48' haulmark(gvwr 21k) and to say the least its a load behind the truck even being a dually.