2004 chevy diesel. We took our truck to 3 different shops before finding this electrical wiring repair shop. Our truck batteries (diesel) kept draining with a non start after sitting for 2 days. This went on for 6 months with new batteries, new alternator and one shop even told us we need a new fuel system. Decided to take it to Leftys they initially replaced the cluster panel, the lights on dash were faded so it needed to be done, took it home after 2 days it again would not start. Called Leftys and they advised us to bring it back we did and they disconnected the alarm and that was it! It starts up every time and no issues in the last couple months. Should of taken it there to begin with.