Expert Truck And Trailer Repair. Expert Truck And Trailer Repair. Diesel Services of Northern Colorado is the largest independent full-service truck repair shop providing maintenance and repair of all truck types: light, medium and heavy duty. With more than 15 years in the same location, we are staffed for the fastest turn-around time in the area. Our expert staff welcomes any make of truck;gas, diesel or propane powered. We offer engine diagnostics, repair, rebuilding and replacement;chassis service;brake service;transmission work;ignition and charging system repair;electrical repair;air system repair;AC repair;emissions failures, hydraulic equipment repairs, DOT inspections;trailer repair inside and out including landing gear, tandems, brakes and refer unit engines;welding and fabrication;fifth wheel and hitch repair and installation;We accommodate commercial fleets, independents and individuals alike. Bring in your forklift, boom, conveyor, trailer, refer unit, tag-a-log, pump, compressor, welder, drill rig, A.P.U., backhoe, skid steer, loader, bulldozer, excavator-you name it. We have a drop yard for major repairs. We accept Visa, MasterCard, Discover, American Express, Wright Express, Voyager, FleetOne, ProFleet, ConChek, T-check, EFS check, Donlen Fleet, ARI and more. Two mobile service trucks are available for on-site repairs. We are A+ rated by the BBB.