TRUST YOUR TRUCK TO THE DIESEL EXPERTSSCHEDULE DIESEL SERVICES IN ASHEVILLE, NORTH CAROLINA TODAYTameless Performance, LLC is a diesel mechanic shop located in Asheville, North Carolina. If your diesel truck isn't performing properly, we can help. Our expert mechanics can repair your truck and help you boost your engine's performance. We have the experience needed to handle everything from turbocharger installations to oil changes.