Q: I have a 2005 Silverado Z71 5.3l. I received a charging system failure notification and my battery light came on. I drove home par

asked by on June 23, 2017

I have a 2005 Silverado Z71 5.3l. I received a charging system failure notification and my battery light came on. I drove home parked, and turned off the truck. Notification disappeared as well as the battery light. The following day I drove the truck and no notification or light. Later that night I started the truck and low and behold notification and light appear. Turned off truck and disappeared. Restarted and drove it, about 15 minutes into the drive lights began to get extremely dim. Volt meter was reading at 14, then jumped up between 14 & 19, at times bouncing side to side, then back to 14. Got home and took it the next day to test alternator, battery, and starter. All passed..any suggestions

My car has 170000 miles.
My car has an automatic transmission.

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