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High voltage

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Old March 13th, 2023, 12:39 PM
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Default High voltage

~HELP!~
'06 Tahoe Z71/5.3/4×4/216,000miles
Started with increasing voltage so checked and was told needed a new alternator. Replaced it and the issue has gotten increasingly worse. It not only red lines but is maxed out. When this started and i turned off the vehicle the voltage guage would stay at roughly 12 now it goes from˝ inch passed 19 back down to 19. Has anyone had similar issues?



Thanks in advance




Old March 13th, 2023, 1:17 PM
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Originally Posted by 06z71
~HELP!~
'06 Tahoe Z71/5.3/4×4/216,000miles
Started with increasing voltage so checked and was told needed a new alternator. Replaced it and the issue has gotten increasingly worse. It not only red lines but is maxed out. When this started and i turned off the vehicle the voltage guage would stay at roughly 12 now it goes from˝ inch passed 19 back down to 19. Has anyone had similar issues?



Thanks in advance
Put a volt meter on it to verify the charge rate.
Old March 13th, 2023, 1:20 PM
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Originally Posted by kevinkpk
Put a volt meter on it to verify the charge rate.
Are you having slow crank at start, could be an indirect short your alternator is feeding?
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