Charging system failure

Replacing the same part over and over is never a good substitute for proper diagnostics. Take it to a shop that specializes in electrical issues and find the actual problem. It's not likely something you will find on your own.

Try also checking the battery cable connections. I had to change out the ground cable at the fuse box inside the engine compartment. The cable was arching, which gave it a weak connection. It has ran fine for the most part now, but it still dies out from time to time.

Can anyone answer what the problem is please thank you

It’s been a year. I’m guessing they’ve got it fixed by now. I doubt any more information will be forthcoming.

ive been haveing the same problem i have a 05 grand prix 3800 series 2 motor, i replaced alternator and put a brand new battery in it when the battery saver active and chargeing system failure light came on but still didnt fix it, but i have a good idea what it might be soo whoever is reading this listen up!, if your haveing the system failure light pop up and the car is chargeing correctly its the security charm alarm bullshit that u buy soo u can install a aftermarket radio in it, its really dumb why pontiac did that, just causes more problems like a ton of people is haveing but you buy the cheaper charm alarm systems i guarantee you will cause those problems because i had one, soo took it off and put factory cd player back in and it fixed it!