Help Me Understand
I have a 2013 Chevy Silverado Extended Cab with 5.3 engine with 77000 miles on it. I purchase this vehicle in April 2019. I have driven it about 2000 miles and pulled my 23 trailer with no problems. ...
Forum Discussion
According to GM's technical documentation on the subject, such as the one lawrosa linked above, the target output voltage in "charge mode" ranges between 13.9 and 15.5 volts depending on the battery state of charge and the estimated battery temperature. 15.8V actual doesn't sound too far out of line (particularly when made with measurement equipment of unknown precision).
