General Info

Guaranteed Truck Service offers a full range of on-site commercial fleet services in the Phoenix, AZ metropolitan area. With certified, experienced technicians and customized solutions, we specialize in preventative maintenance, repair, and road service for commercial trucks, diesel trucks, and other utility vehicles. Our goal is to deliver fast service, reliable results, and great value. A part of The W.W. Williams Company, GTS provides engine diagnostics, diesel engine maintenance and repairs, parts, and roadside assistance to keep your commercial trucks running.