Hey all...I have an issue that came up today...not sure when the symptoms started. Simply put, battery died out because alternator wasn't charging it, so it seems. I happen to be in the same parking lot as an autozone when my check gauges warning light came on and the gauge showing charging was all the way to the left. Had Autozone check battery, said it was good but needed charging, so I started truck and they said it wasn't getting any volts so we assumed alternator. Bought Alt and drove back to office where the battery totally ran out. Installed new alternator and had a fellow member come by and give it a jump. Started but the gauge didn't go all the way to middle and when I removed jumper cables the gauge went to the left again and drain out. Is there a voltage regulator on our trucks? thanks in advance fellas..