2009 GMC Sierra alt voltage
#4
I'd say don't mess with it. Your alternator is charging your battery.
What you'll be looking for, is the voltage to go down a bit after running the truck for a while after starting it. The alternator should back off a bit once your battery is charged up again.
What you'll be looking for, is the voltage to go down a bit after running the truck for a while after starting it. The alternator should back off a bit once your battery is charged up again.
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