Auto Computer specialist really helped me out in a big way. My ECM went out 500 miles from home on the side of the interstate. I got the truck to a shop and we narrowed down the problem to the ECM. I called Auto Computer Specialist around 2pm and told him my predicament. He expedited his service and had an ECM overnighted to the shop I was stuck at. We received it from UPS around 10am the next morning and I was back on the road within the hour. I can't thank him enough for helping me get back home as quickly as possible. I'm a customer for life.