5+ years of medium- to heavy-duty vehicle repair experience, including preventive maintenance, tire and wheel service, air and air disc brakes, diagnostics, computerized diagnostics, electrical troubleshooting, electronic component repair, and a minimum of 2 years of A/C refrigeration experience. 2+ years of medium- to heavy-duty vehicle repair experience, including preventive maintenance, tire and wheel service, air and air disc brakes, diagnostics, computerized diagnostics, electrical troubleshooting, electronic component repair, and A/C refrigeration.