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Message: <blockquote data-quote="HardofWhoring" data-source="post: 8851392" data-attributes="member: 674149">What is the vehicle?    I know on the older GM and Chevy pickups, they had two sizes of alternators.   The smaller case alt was the factory 105 amp.   The larger case alt was 130, (and so was everything else unless someone made a custom from the small case).   The larger case alt moved the pulley and needed a 3/4" longer belt.   The shorter belt was able to be installed and ran, but put a lot more pressure on the belt and would lead to hard starting and premature failure of the alt.  When you say dying: is it running and not starting?  Is it running and the voltage is dropping, is it dying all of a sudden as if you hit a bump and it dies?    Try to give as much detail as you can.</blockquote>

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