Heavy Doctor offers expert semi-truck and trailer maintenance, diesel engine repairs, fleet servicing, and roadside assistance. Our services include diesel engine diagnostics and overhauls, brake system inspections, oil and filter changes, V-belt replacements, driveline repairs, pre-trip inspections, gearbox and differential repairs, mobile breakdown support, and full fleet maintenance solutions. We focus on fast response times, high-quality workmanship, and reliable service to keep your vehicles road-ready.