The alternator is responsible for charging the car battery and powering all the car's onboard network consumers. If it fails or is unstable, the battery will either not be charged or start discharging ...
I have a 2003 GMC Sierra. Sometimes it won’t crank or start. Nothing. All the usual stuff has been checked out — battery, starter, alternator, fuses — and I’m told they’re all good. I did twist the ...