Great denso a/c class, great teachers!

Review left by Jerry Allen from A & J Auto Repair 

Great webinar and presentation. Wish I could have attended the longer version in person version. Great training manual as always!

-Review left by Kevin Hough of Kennesaw Auto Center Inc

Wally was great! Learned a lot in intermittent driveability and electrical diagnosis. Much different thought process than what I’ve been taught throughout my career. Definitely will be back!

Review left by Joshua Towler from Christian Brothers Automotive 

Eric Walker and Rick Kelly make a great team while presenting the ATG General Motors Drivability & Code Diagnostics online course. Each night is only 1.5 hours per night, two nights in a row. This allows you to work hard all day and still get enough sleep to be productive at work the next day. A must-have is the well-designed and laid-out manual that is approximately 3/4" thick and packed with valuable diagnostic information and waveforms. ATG is AWESOME.

Review left by Eric A. from College of Western Idaho 

Eric Walker and Rick Kelly both know their stuff! Took GM diagnostics class learned a lot in the two night!

Review left by Matt E. of NWFSC 


Just completed the Intermittent Electrical and Drivability Daig class with Wally Great class!! REALY enjoyed it!

Review left by Buzz Varella of Hanahan Automotive 


Awesome class and the awesome instructor Wally M! Next class I would like to see in Green Bay Wisconsin would be the Intermittent electrical and drive-ability diagnostic strategies.

I have been a customer of ATG since 1987 when I lived in Southern California and was a technician. I used ATG when they offered VCR Tapes, then DVD and books, in-person classes, to now their Zoom classes. When I owned my shop my technicians and myself always looked forward to ATG training. In-depth information, with simple instruction and easy to follow. I now teach at a college along with owning a diagnostic business. Staying current with today's technologies and using ATG to reinforce the information has been a key factor to my success.

Review left by Eric Anderson of College of Western Idaho 

Awesome course so far. Good communications from both Tim and Brian. I learned a lot and can't wait for more knowledge to come!

Review left by Steven Railey of Mac's Automotive 

GDI class presentation by Rick and Cody was an excellent informative presentation. Very well put together. Thanks to everyone at ATG training!

Review left by Arthur Fricchione 


Sign up to receive news of new titles and be notified when new training seminars will be conducted in your area.
Subscribe Now →

ATG logo color negative RGB with descriptor

ATG logo color negative RGB with descriptor


Upcoming Classes

Check out what classes we already have on the schedule for the upcoming weeks.
Class Schedule →