Took my old 2007 GMC Duramax Diesel there for the first time after my regular mechanic could not figure out why my truck would not crank in the mornings and then got progressively worse to the point it did not want to crank at all. I left it with them overnight so they could see how it acted cold and they fixed it the next day. Turned out to be a leak in my fuel filter housing. They kept it overnight to make sure it would crank the next morning and called me to come to get it. I can't thank them enough for doing such a quick job and returning my truck to me. It is my only vehicle and is used for my business. Very impressed with their knowledge of diesel trucks and especially the older ones with problems.