Relentless Diesel is based in the heart of Northwest Indiana, while we specialize in aftermarket upgrades, we also do regular repairs and diagnostics. Whether you have one car or a fleet of semi's, Relentless Diesel is your shop!! Most minor repairs we offer same day parts and service. Relentless Diesel is a name you can trust and rely on. Want that extra lighting going off road or need rear work lights? Then look no further, we offer a complete line of LED light bars and work lights. When your on a budget and want a quality light, well look no further! We also offer a full and vast line of warning and emergency lighting. Roadside repair, Tow trucks, snowplowing, construction you name it we have the lights to outfit your vehicle with! Our Services Include: - Complete Computer Diagnostics - Complete Performance Upgrades - Drive ability Problems - Tune - ups - Oil Changes - Tires - Bulletproofing Specialists - Mufflers and exhaust systems - Steering and Suspensions - EGR/DPF Delete We are an all around performance shop specializing in diesel engines. We also now offer sales and installation of LED off road/work lighting! We staff 3 full time mechanics and have over 50 yrs combines experience in the diesel performance field. Our technicians are knowledgeable and efficient when it comes to repairing or upgrading your vehicle. We have endless resources available to get the job done! Call or stop in today!