2017 chev 3500 express .I need to know where the 2 spare 30amp fuses are for this battery and how do you get into the van with wiring.

 

Not sure about the 2017, but on earlier Duramax vans the on-frame battery was wired directly parallel wit h the main battery. The power distribution center is riveted at the back of the core support near the RH head light.

 

pappajoe, was wondering if you had luck with finding the factory fuse junction and the blunt end connector ? i am working on a 2017 exp 2500 with the aux battery and can not locate the connector or the fuse junction.