Mobile Wrench is Colorado’s most experienced mobile diesel mechanic providing reliable on-site mobile fleet services. Our highly qualified expert diesel mechanics come to your location at your scheduled time to inspect, maintain, and repair your diesel trucks, trailers, buckets, booms, liftgates, and other equipment. Our on-site fleet service will keep your trucks safe and compliant and minimize downtime. Fleet management is simplified when your diesel trucks and equipment are maintained on-site. For professional diesel truck diagnostics and DOT annual inspections, call Mobile Wrench for your mobile fleet maintenance and repair.