We offer repair and maintenance service for all makes of medium and heavy trucks, diesel engines, and transmissions. We offer 24/7 service in Whittier and Fontana, and convenient hours in our other locations. Check out our service specials for competing prices on maintenance and repair services, or click a location to the left for hours, contact information, and driving directions. We have over 150 fully trained technicians supported by an in-house training department and the most up-to-date tools, equipment, and facilities in Southern California and Nevada. Call any of our locations about designing a program to out-source your maintenance. We are fully certified for Detroit Diesel,Mercedes Benz, CAT and Cummins warranty repairs, and are qualified for Allison maintenance and rebuild services (rebuild available in Whittier, Los Angeles). SERVICE SPECIALS