Flashing battery light on Chevy avalanche Silverados etc
I came across this problem where I noticed that my voltage gauge in my truck was fluctuating, let it go on for a little while then as I was backing in my driveway my 02 Chevy avalanche almost died out and I lost power but it came back on, that being said I figured my alternator was going out so I disconnected the battery and the truck turned off, which is a good indication that the alternator is not working because he alternator should pick up the power and keep the vehicle running, I went and got a new alternator same as you except now the battery light is flashing on and off and my gauge and the truck is not even halfway on the power indicator, I saw one guy on here saying that he bought a Bosch alternator and it sends back 5 volts to the PCM and helps the alternator charge etc, but after doing that 4 times, I learned that maybe I should change out the banana clip that plugs into the back of the alternator that goes to the PCM maybe the clip and the terminals inside of it aren't making proper connection, because my alternator is were all good my battery is brand new and yes I did try the Bosh 130 amp alternator do not get the 105 amp alternator. so after changing the banana clip and putting back in my original alternator this thing is running perfect my voltage meter is way past the middle and my battery light has not flashed since I hope this helps I also cleaned all the terminals and made sure they were shiny before I hook everything back up including on the battery and the little red box next to the alternator took that apart cleaned up everything in there, but I definitely believe that it had a lot to do with that banana clip in the back of the alternator that goes back to the PCM and to the starter hope I helped.