GM Global B Architecture

Matt Diagnostician Red Wing, Minnesota Posted   Latest   Edited  

You have most likely heard about GM Global A vehicles, especially when talking scan tools. You may have heard about Global B. This isn't that in-depth, but it's a quick read about where manufacturers, and in this case GM, are going to position for the future. Some interesting numbers for speeds and volume of information.

sae​.​org/news/2020/02/n…

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Michael Mobile Technician
Clinton, Utah
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Just when one thinks they are getting used to the Global A system, here comes Global B. I am sure there are improvements for the consumer but it sounds like our jobs are going to get more complicated. Of course that comes with a big raise, right?

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Tyler Technician
Hammonds Plains , Nova Scotia
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Cool stuff! I would like to see the 100,000-sq​.​ft validation lab and that robot that mashes buttons and controls.

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Michael Owner
Pelham, Alabama
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GM calls it "Next Generation Digital Vehicle Platform"... gm-techlink​.​com/?p=12167

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Tyler Technician
Hammonds Plains , Nova Scotia
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Programming is now done with all doors closed and the ignition off. With this new process, the Serial Data Gateway Module can wake up a specific module for programming with no other information on the bus, which also promotes faster programming. That is also interesting! Makes a lot of sense to me.

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Scott Manager
Claremont, California
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Interesting performance numbers on bandwidth, 4.5TB/Hr... Here are my notes on what Tesla’s capabilities are:

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Bob Owner/Technician
East Longmeadow, Massachusetts
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It's kind of funny that GM advertises their transmission speeds by the hour. That just seems wrong. So Tesla can move 120TB of data in the same time GM can move 4.5? Looks like their next generation is still behind the curve.

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Marc Technician
Greeley, Colorado
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Actually, Scott's post says 2 terabytes per SECOND, while the GM data rate is 4.5 terabytes per HOUR. That means the Tesla rate is 7,200 terabytes per hour or 1,600 times faster than Global B.

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Bob Owner/Technician
East Longmeadow, Massachusetts
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Good catch. I converted to minutes but forgot to convert to hours. That's an incredible difference in speed.

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Anthony Technical Support Specialist
Kirkwood, Pennsylvania
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Yup, I can't imagine having an issue pro/re-programming using a J-tool hooked up to CAN-C. Nah, what could possibly go wrong? (Granted, N/A for Tesla but still applicable to other makes.) Guido

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