Truck Mechanic Truck mechanics, also known as diesel services technicians and mechanics, perform a variety of tasks on heavy-duty trucks, large construction vehicles, buses and tractor trailers. They inspect, diagnose and repair brake systems, engines, electrical components, steering systems, transmissions and tires SALARY $44,962-$57,365 EDUCATION Earn a high school diploma and complete 3-4 years of training, or earn a certificate and/or an associate's degree in diesel engine repair or service technology and earn a certification from the National Institute for Automotive Service. yes i would like to work in this job because thats what i want to be when i grow up.