Would the dealer be the easiest place to order one? Looking for the one for a 2008 Chevy 2500 with the LMM Duramax. Im helping my friend with some performance parts on his Dmax (Fleece Cheetah turbo, EGR delete, etc) we want to pull the Allison tranny to better access the turbo and EGR components, this will both be our first time pulling an Allison were both mechanically inclined(hes a marine diesel mechanic) but we figured it couldnt hurt to have the factory manual, especially for torque specs. thanks guys.