General Info

Guaranteed Truck Service offers a full range of on-site commercial fleet services to businesses located in the Peoria, Glendale, and greater Phoenix metro areas. With trained and certified, experienced technicians, customized solutions, and professional business practices, you can trust us to handle all of your commercial fleet needs from engine diagnostics, diesel engine maintenance and repairs, parts, and roadside assistance. A part of The W.W. Williams Company, GTS' goal is to deliver fast service, reliable results, and great value - all to keep your commercial trucks running.