Voltage gauge & alt question - a dumb one, but I've been living in ammeter world... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**jocko** · 12-08-2016, 02:12 PM

01 5.3 Z71, voltage gauge reads direct art voltage or alternator output? Assume the later. But started scratching head. While running voltage dropped to approx 10 volts for 5 min with a red batt light. Then it jumped to approx 15-16V and is hangin out there. Kinda high.... Assume it's new alternator time, but just wanted to ask.

Also - do these newer alternators still produce a magnetic pull at the rear shaft bearing like the old ones do?

12-08-2016, 02:12 PM	#1
jocko Senior Member Join Date: Oct 2009 Location: Godley, TX Posts: 17,975	Voltage gauge & alt question - a dumb one, but I've been living in ammeter world... 01 5.3 Z71, voltage gauge reads direct art voltage or alternator output? Assume the later. But started scratching head. While running voltage dropped to approx 10 volts for 5 min with a red batt light. Then it jumped to approx 15-16V and is hangin out there. Kinda high.... Assume it's new alternator time, but just wanted to ask. Also - do these newer alternators still produce a magnetic pull at the rear shaft bearing like the old ones do?



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