I am not sure if this is the right place to post, so if it isn't I applogize. I am going to look at an 03 GMC 2500hd Crew Cab 4x4 with 198000 miles and injectors that were replaced in Sept 14. I am new to Duramax engines but not GM's. Just want some advice on what to look for engine wise. Any advice will really help. Looks like a pretty clean truck and it's decently priced. Thanks