Got on the roof of our 274 today to inspect everything. Upon looking at the gutters along each side I noticed that some of the screws had backed out or they weren't tightened from the factory. I also notice that the gutters were ran all the way into the little downspouts restricting the water from freely flowing out. Mind had some small twigs and leaves bunched up at the ends. I was able to cut a small section of the wall of the gutter away with some diagonal wire cutters, it's aluminum . Now the water and small debris can flow out without the need gutters filling up. Sorry but I didn't get pic's .
2008 GMC 2500 duramax