Stabilitrak and Reduced Engine Power in 2013 Tahoe

[herbert77060]

I had the battery and alternator checked by two different places (one being my mechanic) and they both said the alternator was fine.

 

[Geotrash]

I had the battery and alternator checked by two different places (one being my mechanic) and they both said the alternator was fine.

Uh huh. Unless their tester checks for ripple currents, which most don't, you can take their opinion with a grain of salt.

Alternator Ripple Voltage Testing

Before computers and networks in vehicles, an alternator that was producing AC voltage or ripple through the electrical system would cause flickering lights and maybe an ignition problem. Today, excessive ripple voltage can cause communication issues with networks and communication DTCs in...

www.underhoodservice.com

 

[herbert77060]

I appreciate all of the comments and suggestions