About CMT

CMT Diagnostics and Repair is a family-owned mobile repair and fleet service based in Panama City, Florida. We specialize in on-site fleet repair, automotive repair, diesel repair, DOT inspections, crane inspections, equipment repair, and car repair — covering Class 3 through Class 8 diesel trucks, semi trucks, big rigs, tractor trailers, heavy equipment, and passenger vehicles. Our service area runs along Highway 98 and Interstate 10 from Mexico Beach to Fort Walton, FL — including Panama City, Panama City Beach, Lynn Haven, Callaway, Southport, Parker, Mexico Beach, Port St. Joe, Destin, Niceville, Fort Walton Beach, Crestview, DeFuniak Springs, Bay County, Walton County, Okaloosa County, and the Florida Panhandle. Whether you operate a single work truck, an owner-operator rig, a passenger vehicle, or manage an entire commercial fleet, we bring the shop to you — minimizing downtime and keeping your business moving 24/7 with emergency roadside assistance.

CMT was built on a simple principle: repair should be fast, honest, and come to the customer — not the other way around. Over the years, we have earned a reputation across the Florida Panhandle for our technical precision, transparent pricing, and no-nonsense approach to fleet, automotive, diesel, and equipment repair. From Bay County to Walton, Okaloosa, Washington, Jackson, and Gulf counties, our fully equipped mobile service truck is dispatched directly to your location along Highway 98 and Interstate 10, day or night.

Our technicians are trained on the latest diagnostic platforms, including OEM-level scan tools for Cummins, Caterpillar, Detroit Diesel, PACCAR, and International engines. We service every major heavy duty and medium duty truck platform — Freightliner Cascadia & M2, Peterbilt 389/579/536/537, Kenworth T680/W900/T270/T370, International LT/RH/HV/MV/CV, Volvo VNL/VNR, and Mack Anthem/Granite/MD. We handle everything from routine preventive maintenance, on-site oil changes, and mobile DOT inspections to crane inspections, equipment repair, car repair, complex aftertreatment system repairs, DPF cleaning and regeneration, DEF system repair, turbocharger replacements, heavy duty brake repair, transmission overhauls, semi truck A/C repair, trailer repair, and electrical troubleshooting. We work on the side of the road, in fleet yards, at construction job sites, and at distribution centers across Panama City, Panama City Beach, Lynn Haven, Callaway, Southport, Parker, Cedar Grove, Laguna Beach, Mexico Beach, Port St. Joe, Destin, Niceville, Fort Walton Beach, Crestview, DeFuniak Springs, Tyndall AFB, Eglin AFB, and throughout Bay County, Walton County, Okaloosa County, and the Florida Panhandle — wherever you need us.

CMT Diagnostics and Repair serves a diverse range of customers, including independent owner-operators, construction companies, logging operations, municipal fleets, landscaping services, regional freight carriers, and everyday drivers needing car repair. No job is too big or too small. Our goal is to get your truck, equipment, or vehicle diagnosed accurately and back in service as quickly as possible — with repairs done right the first time.

As a local, family-owned diesel repair business in Panama City, FL, we take pride in our community relationships. We know our customers by name, and we treat every truck like it's our own. When you call CMT, you're not just getting a mobile diesel mechanic — you're getting a partner committed to the long-term health and performance of your fleet. That's the Diesel Doctor difference.