I've been looking at getting a diesel for a while. I like to do a lot of research before I make a big ticket purchase, especially one as important as my first diesel. The truck I'm looking at is an 02 GMC 2500HD. It has 181k on the clock and an edge performance chip with a 4in exhaust and 5in tip. I'm not sure of the brand of exhaust. I haven't gone to look at the truck yet but I'm wanting to get some general information on what to look out for with the 02. I'm going to primarily use this truck as a toy hauler every once in a while. Don't have my trailer yet but I'm thinking a decent sized trailer around 20' or so. I appreciate the input!