2017 Silverado 3500HD Low Voltage Issue
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I Have a Silverado 3500HD with the 6.0L Gas engine. I have a low voltage situation that I don't believe to be "normal". The dash gauge shows normal 13.8V upon startup, then a few minutes it drops to about 10V. The needle settles just above the lower limit for "normal". I know that the user manual and manufacturer specifications describe this as a normal condition, and the charging system will lower the voltage to extend the battery voltage.
Here's the rub. A couple weeks ago, I took the truck on a 5 hour road trip. I noticed the needle drop during this trip. I left the vehicle and did what I had needed to do. When I returned, the truck started normally and operated well for the trip home. I stopped for gas just before parking the truck for the night. After filling, the battery didn't have sufficient charge to start the vehicle. I had the battery and alternator tested separate by removing each component and taking to a test facility. Both were fine on the bench.
Why did I lose charge on the trip? Why do I never see the voltage gauge return closer to 14 volts? Anyone have experience with a similar condition?
Here's the rub. A couple weeks ago, I took the truck on a 5 hour road trip. I noticed the needle drop during this trip. I left the vehicle and did what I had needed to do. When I returned, the truck started normally and operated well for the trip home. I stopped for gas just before parking the truck for the night. After filling, the battery didn't have sufficient charge to start the vehicle. I had the battery and alternator tested separate by removing each component and taking to a test facility. Both were fine on the bench.
Why did I lose charge on the trip? Why do I never see the voltage gauge return closer to 14 volts? Anyone have experience with a similar condition?