I am 54, and just bought my first diesel truck. 2007 Chevrolet Silverado 2500HD 4X4 New body style 6.6l LMM. I am having the DPF removed, and an external fuel pump added. I'm not looking to go crazy with horsepower, I just would like recommendations on upgrading. For example, transmission cooler, etc. I plan on using it for mostly pulling campers, and trailers.