We are O & O Complete Truck & Fleet Maintenance
Over 17 Years of Experience in Diesel Truck Maintenance & Fleet Repair
O & O Complete Truck & Fleet Maintenance is a mobile diesel repair service specializing in minor repairs and preventative maintenance for Isuzu, Mitsubishi Fuso, Hino, UD (Nissan Diesel), and GMC trucks.
With over 17 years of hands-on experience, we help fleet owners and independent operators reduce downtime, avoid costly shop visits, and keep their trucks on the road.
Reliable service from a
Certified diesel mechanic
Not all diesel repair services are the same. Many shops overcharge, take too long, or don’t have the right expertise for light- and medium-duty diesel trucks.
We work only with diesel fleet trucks for consistent service
We use OEM parts, ensuring high-quality repairs that last
We offer on-site service, eliminating shop delays
We don’t just repair trucks—we help businesses stay operational, saving time and money with preventative maintenance and fast, expert repairs.
Industry-Recognized Training Real-world experience.
O & O is led by Oscar Castellon, a Mitsubishi Fuso Triple Diamond Certified Diesel Technician with over 17 years of hands-on experience in diesel truck maintenance.
We’ve worked with small businesses, independent operators, and fleet owners across Miami-Dade, Broward, and Palm Beach counties, providing trusted diesel repair services that keep trucks running efficiently.
Specialized Diesel Truck Expertise
Preventative Maintenance & 21-Point Inspections
Cooling, Fuel, and Exhaust System Fixes
Brake, Transmission, and Clutch Repairs
Pre-Inspection Checks & Fleet Maintenance Plans
Trusted by fleet owners & independent operators across South Florida
O & O has helped businesses across Miami-Dade, Broward, and Palm Beach reduce downtime, save money, and keep their trucks running smoothly.
What fleet owners are saying
Get the Free Guide
5 Common Diesel Truck Issues That Can Shut You Down
Learn how to avoid costly breakdowns and prevent downtime with expert maintenance tips from O & O’s certified diesel mechanics.