Service Battery Charging System

[Allenayres83]

I have a 2015 Silverado and my service battery charging system light has been coming on randomly. I have changed the alternator, battery, and voltage sensor. The battery connections look clean so I havent cleaned them. Each time I have changed a component the light went away and everything was good for a couple weeks to a couple months and then I would get the notification again. Recently I didnt know what else to do so I just disconnected the negative terminal, waited about 30 seconds, and then reconnected it. This will cause the light to go away and it will run no problem for a period of time. I have done this probably 4 times and it has always worked. I am thinking that maybe none of the components I changed were the problem and that by disconnecting the battery to replace them it made me think I fixed it. Any ideas on what may be going on here?

[mikeyk101]

I would lean towards a problem with negative battery cable and/or one of the infamous ground needs attention. 2 that seem to have the most problems are the g218 that is located under left dash speaker as well as the ground located inside front passenger wheel well. The g218 problem is that sometimes some of the insulation gets stuck around thread and under nut not allowing a proper ground. Simply removing nut and cutting back insulation to clear around stud before reinstalling nut fixes this. The one inside front passenger wheel well needs to be removed and cleaned including frame where ground is bolted to so it gets a proper ground.

[rav3]

You need to clean your grounds on the body (firewall  frame)  Here's a good video.