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
First, most dash mounted gauges are not very accurate.
Second, unlike older (pre-2000) vehicle, modern vehicles vary the charging voltage "as required". Using a "good quality" meter and measuring directly at the battery posts, typically the voltage will be above 14V shortly after starting, but will drop down to around 13.8V after it has been running for awhile.
If it drops below 13.2V at "fast idle", you have a problem !
Second, unlike older (pre-2000) vehicle, modern vehicles vary the charging voltage "as required". Using a "good quality" meter and measuring directly at the battery posts, typically the voltage will be above 14V shortly after starting, but will drop down to around 13.8V after it has been running for awhile.
If it drops below 13.2V at "fast idle", you have a problem !
