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Passenger battery distribution block diagram

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Does anyone have a link to the passenger side battery distribution block diagram? I have a 2020 High Country Duramax 6.6. I am specifically looking for where the 100a fuse goes to. I accidentally blew that fuse, and can't find any info online about what is connected to it. I have the wire pulled off of that fuse in the Pic. 


Edited by Gunnar Jacobson
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I'm a fan of the electrical diagrams from the GM Upfitters website. You can get it at https://www.gmupfitter.com/light-duty-vehicles/light-duty-2020/. It's in the electrical section on page 218.


Pretty sure there's some typo's on the diagram though. It has F4 through F8 in the wrong order. You can tell because F7 and F8 are definitely not 125A or 150A fuses. From what I can tell, your blown 100A fuse goes to "E40 Electrical Axuiliary Heater (C32)".

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5 minutes ago, gemarsh said:

Does that whole bussbar need replaced when 1 of those fuses blow? Looks like the fuses are riveted to the bar.


That’s what I have read, yes. The angled crimp connections are specific to GMs design. You could replace a fuse yourself, but it seems the GM intent is to replace the whole unit if one fuse is burned out. 

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31 minutes ago, gemarsh said:



What does the schematic say the 5 amp fuse is for? Strange seeing it with the size of fuses it is hanging out with!

Says it goes to "K9 Body Control Module". I'd think the BCM would need more than a 5A fuse, but I didn't look anymore into it.

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