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2018 XT5 Platinum, 2014 S550
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1,653 Posts
Discussion Starter #1
Ok, I now have all the parts to add the 2nd battery. I would like to use the bolt hole on the engine block below the alternator. Any idea what bolt can go in there and where to get it? This is where I want to connect the ground for the 2nd battery.
Installing 2 ACDelco AGM Type 48 batts with OEM Cables.

Thanks
 

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2011 Escalade Premium Edition
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196 Posts
8mm IIRC. I used the same hole. Any auto part store should have a selection of bolts. Make sure it is not too long so it doesn't bottom out and crack the block.
 
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