1999 Yukon 5.7

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Timqua

TYF Newbie
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Replacing the Alternator @150,000 original miles .

On the rear left of the alternator is a 10mm threaded hole .
The old alternator had NO BOLT in it.
But all the Videos show it being installed.

Do I need to find one and replace it??
It does not seem to have any purpose….but don’t wanna firetruck up!

Any feedback would be appreciated
 

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