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Vehicle acts like it stalls sometimes

My car only has 55k/miles. One day it starting saying battery saver on. Eventually the car just died. I had ot checked and was deemed the alternator was th culprit. No one had those part available then the proce for when it will be available was over $1800, crazy. Now it has been released and can be purchased at local part stores but im wondering if that is the problem for sure. We replaced the battery. It drove less than 10miles and then died again the same way. I cant even open the trunk. My car has been sitting aince 2/2025. Any insight??

The engine starts, the car moves but no power in ac, windows, lights. We replaced burned/damaged BCM. Before we replaced BCM, headlights and brake lights working. You think the shop damaged my BCM? Because it seems the problems styes even after installing new BCM. Thanks.

Turn bright lights on truck dies now no air conditioner or blinkers no low beam but can run high beams only

Can start it and put it in gear and it will die and can't get it to start back