OK I will back away from the ledge, but it is so very disappointing after looking at these web sites for years and finally buying my first diesel and being so excited and proud about it, to find out it will not pull 8500 lbs up a hill without overheating. GM dealer is now telling me that they will order the parts to replace the air box whch will cool down the motor and in turn cool the tranny. My next question is does this work. Truck is a 2004 3500 4x4 LLY, 22,000 miles with no modifications.