At a Glance:

Contact: Leon Grimes
Leon Grimes, Automotive Instructor
Phone: 404 225-4489
Department: Academic Affairs, Industrial & Transportation Technologies Division
, Program Chair
Direct: (404) 225-4489


Diesel Truck Maintenance Technician

Program Overview

The Diesel Truck Maintenance Technician certificate program provides training in the essential knowledge, skills, and attitudes necessary for employment as a maintenance technician on semi-trucks, trailers or other diesel equipment. The topics covered include diesel shop safety, tools, and equipment, preventive maintenance procedures, truck brake systems, and truck drive trains.

Entrance Requirements

Admissions Requirements
  • Must be 16 years of age
  • Completion of high school or GED and submission of official transcript required to apply
  • Achievement of minimum program admission scores in Reading, English, and Math
  • Transfer of previous post secondary credits will be determined by the registrar
  • Student Performance/Graduation Requirements: Students must maintain a 2.0 grade point average and complete all required courses to graduate


Course Overview

Contact Hours
Credit Hours
Curriculum (25 hours)
Occupational Courses (25 hours)
This course introduces basic knowledge and skills the student must have to succeed in the Diesel Equipment Technology field. Topics include an overview of diesel powered vehicles, diesel technology safety skills, basic tools and equipment, reference materials, measuring instruments, shop operation, mechanical fasteners, welding safety, and basic welding skills. Classroom and lab experiences on safety, precision measuring, and basic shop practices are highly emphasized.
This course introduces students to electrical and electronic systems used on medium/heavy duty trucks and heavy equipment. Topics include: general electrical system diagnosis, battery diagnosis and repair, starting system diagnosis and repair, charging system diagnosis and repair, lighting system diagnosis and repair, gauges and warning devices, and an introduction and familiarization with electrical and electronic systems.
This course introduces preventive maintenance procedures pertaining to medium/heavy duty trucks and heavy equipment. Topics include: engine systems; cab and hood; heating, ventilation and air conditioning (HVAC); electrical and electronics; frame and chassis.
This course introduces air and hydraulic brake systems used on medium/heavy duty trucks. Classroom theory on brake systems along Federal Motor Vehicle Safety Standards (FMVSS) is strongly emphasized. Topics include: introduction to hydraulic systems and safety; air brakes air supply and system service; air brakes mechanical service; parking brakes; hydraulic brake system and service; hydraulic brakes mechanical service; hydraulic brakes power assist units; anti lock brake systems (ABS) and automatic traction control (ATC); and wheel bearings.

This course introduces drive train systems used on medium/heavy duty trucks. Topics include: clutches, transmissions, drive shafts and universal joints, and drive axles.


This course introduces automatic transmissions used on heavy duty trucks. Topics include: torque converters and automatic transmissions.