But I don't know / trust the folks there so Im gonna ask it here! I am planning on buying a trailer here in the near future, I am going to haul my blazer on it. I am quite certain the plan is to buy the wife one of those chevy traverse's and turn our 99 3/4ton burb into my tow rig. Its the 7.4 version with a 4L80E and 168k miles. I usually drive with it not in O/D as it seems to want to slip in and out of it. If I leave it in 3 its fine and performs really well. What mod's / upgrades will make life a lot easier on me? I am towing an approx 5k lb vehicle on top of a tandem axle 16 ft trailer. I have a full towing package on the truck, my questions are performance oriented. What can i do to the trans to help the ol girl out on the highway, and most importantly what can I do to help the burb out while towing up a mountain side to the ORV areas?