Systems Diagnosis and Repair: Diagnose and repair a wide range of systems, including diesel engines (fuel, air, cooling, exhaust), brake and wheel systems, electrical and lighting systems, suspension and steering, liftgates and hydraulics, and HVAC systems (EPA 609 certification required for A/C work). HTI has grown over the years through its five divisions: New Life Transport Parts Center, Road Equipment Parts Center, Pace Transportation Services (2012), Martec International (2019), and US Trailer Parts and Supply (2023).