I bought this 2010 silverado 1500 and when I first got it I noticed the radio has a slight hum when I accelerated; I didn’t think anything of it because it’s the first truck I’ve bought; the truck has 150k and some change on it, recently it’s been having issues, I was driving down the road mid day and the truck started locking and unlocking doors, dash gauges were jumping, lights flickering, trouble shifting, got it home and it stopped for a few days, then did it again and when I got home the battery died on me, I replaced the battery and the problem stopped for a week or two, but the electric gauge was reading under 14 a day or two prior to the change, after a week or two the problem happened again so I figured it was the alternator, I changed that last Wednesday, now whenever I drive with the headlights on, say to work in the morning, the headlights flicker a lot when I accelerate, and the gauge goes below 14, and the radio sound is back but faint, whenever i drive during the day, when the headlights are off, it does fine, the gauge stays on 14 if not over, it may slightly go under but goes back over, does anyone know what can be causing this issue, or can anyone help me? Thank you sorry for the long paragraph.
Have you removed the red and black covers from the battery wires at the battery and examined for corrosion?
Yes i have and they looked brand new
It sounds like there is a loose or dirty ground wire somewhere. GM has a technical service bulletin that describes symptoms similar to yours. The bulletin number is 08-07-30-021H. Another warning discusses voltage drop testing battery cables and looking for arcing over the 175 amp fuse in the underhood fuse box. The bulletin number is PIT4816E.
It sounds like there is a loose or dirty ground wire somewhere. GM has a technical service bulletin that describes symptoms similar to yours. The bulletin number is 08-07-30-021H. Another warning discusses voltage drop testing battery cables and looking for arcing over the 175 amp fuse in the underhood fuse box. The bulletin number is PIT4816E.