It's not normal at all. I had that lb7 for years and been around diesels for a long time, and it's not right, not turbo lag or anything like that. Unless it has something to do with the new dpf, but even that would surprise me. It's a very awkward deal.
Hey guys bought my truck brand new and since the day I've had it, it randomly makes an odd noise. I can't really put any consistency to it but about once a week while I'm moving slow it will motor kinda bog then it will make a short growl sound and kinda sound like it is blowing something out of...
Guys, I'm new here my buddy chad (hoytbows) recommeded I check this place out. I have a 2013 GMC CCSB D/A and previously had an '03 LB7. Drive my truck everyday all over, Im a farrier so I put on a lot of miles pulling my shoeing trailer.