GMLAN Basics

Martin Instructor British Columbia Posted   Latest   Edited  

Last summer, a friend asked if I had anything for his buddy's shop in rural California, that might be useful to help a young fella who worked for him learn some basics of CAN. I've got a lot of material that I can't share, so spent some time assembling a mini course for him.

So, this was a one-off, freebie that I've had sitting around and corrected or changed a couple of things since I sent it to him and shared the original elsewhere.

There are no glitzy videos. Instead there is a slide show accompanied with a workbook and also the answer book for reference. The intent was for the owner to give his trainee the workbook, run through the slides, discuss the material and then see if he could complete the 10 exercises in the workbook. 

This isn't about fixing a problem vehicle and using it as a case study, but being able to read and comprehend, plus navigate through whatever electronic service information is available, to find specific information useful to CAN diagnostics. It is GM focused, since that's my realm.

Since Nolan from the Bahamas posted looking for assistance, now is the right time to share it here. It is my own work the copyright statement is actually in binary code on the cover. If anyone can benefit from using it for self-study or to assist a co-worker or whatever, be my guest. Just be advised that it belongs to me and cannot be sold in any form or edited, but feel free to print and use. Thanks.

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Nick Diagnostician
United Kingdom
Nick
 

Good Work!

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Nolan Technician
Bahamas
Nolan
 

This is outstanding, to be able to receive the help that you so most definitely need is so great. This makes understanding what you're working on that much easier because I can tell you GM is not the easiest to understand by far. This DM Member has gone above and beyond to put the help out there, I know I will be utilizing it and studying it, and most definitely when a GM comes along again thank…

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Bill Owner/Technician
Michigan
Bill
   

Thanks for Sharing! This is good stuff Martin, well done!!

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Mike Educator
North Carolina
Mike
 

Great work, as always. Thanks for sharing.

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David Diagnostician
Georgia
David
   

This is REALLY good stuff. I will be using this nearly immediately. Thank you VERY much for sharing!

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Guy Educator
Illinois
Guy
 

Great stuff Martin! This is something I have been trying to get my students to understand, and your content is a good straight forward approach to it.

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Rhonda Owner
Colorado
Rhonda
 

WOW, Thank you.

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Vinnie Owner/Technician
Georgia
Vinnie
 

Thank you.

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Spiro Service Manager
New York
Spiro
 

Very kind of you. Thank you Martin!

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Raymond Mobile Technician
Michigan
Raymond
 

Hi Martin, I have taken every CAN class known to man and still continue to take classes. Your presentation and training material was easy to understand and well put together , very professional, thank you sir.

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Matthew Owner/Technician
Oregon
Matthew
 

This is fantastic you've taken the time to put this together on your own time and share with the community. Thank you so much for you dedication to education!

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Ray Diagnostician
Ontario
Ray
 

Thank you!

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Peter Manager
Alberta
Peter
 

Thanks so much for your efforts.

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Tim Educator
California
Tim
 

Good of you to share this, Martin.

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Rafael Owner/Technician
California
Rafael
 

Great insight… I can not imagine the effort, time, and knowledge these presentations took. Thank you for the invaluable information you presented and your willingness to share it with us. I am humbled and blown away by this group (although I do not work on GM, it is of great value to me)

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Rex Technical Support Specialist
Ohio
Rex
 

Thank you!

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Dmitriy Analyst
Ontario
Dmitriy
 

Hi Martin, while on GMLAN topic… do you happen to have access to this internal GM document: GMW3110 General Motors Local Area Network Enhanced Diagnostic Test Mode Specification Last revision was in 2018, is there anything planned to supersede it? Thank you for your immense knowledge!

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Martin Instructor
British Columbia
Martin
 

Hi Dmitriy. Thanks. Unfortunately, for the most part I don't have access to any internal standards documents like that. I did come across and read a version around 2010 a while ago, but things have moved on significantly since then. I usually have to hunt around to find white papers of value to find tidbits of useful or interesting info.

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Dmitriy Analyst
Ontario
Dmitriy
 

I see… I’m tempted to buy the 2018 version, but was wondering if I should have looked for a successor… Well, it looks like there is no successor. global​.​ihs​.​com/doc_detail​.​cfm…

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Martin Instructor
British Columbia
Martin
 

That is the most current version that I found too. You know darn well that as soon as you buy it, a new version will be published! VBG.

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Dale Diagnostician
South Dakota
Dale
 

Great information! Was referred to me by someone else as at times I struggle to grasp CAN Networks. Was able to save the first one for offline and personal use but can't seem to figure out how to save #2 and #3 for offline viewing on my mobile device. The first one had a menu option where you could select print, download, etc but the latter 2 don't have any of the options that #1 has.

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Martin Instructor
British Columbia
Martin
 

You're welcome Dale. Click on the double arrow to open the tools as shown. It should work.

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