My 2001, 3500 diesel 6.5 keeps throwing a code every now and then P0236 any Ideas on what maybe the issue... I've been a 7.3 fan for years because the are strong runners but I've always liked my GM gassers so I found a deal on this and other than this issue I love it....It doesn't seem to have he pulling power of the 7.3 and maybe this issue is part of the pulling issue