Have you done any research to see if there is a need for a business of this type, in the area your considering? Do you have any sort of a business plan? Are you borrowing from a bank, or do you have an investor? Do you realize that it usually takes 2 years to develop a profit, in any business? What is your niche?

I hope you didn't just wake up and decide to start a diesel repair business. Judging by your hatred for Chevy's, this probably isn't the best path for you to take. Good luck though!