LOL....most modern vehicles cannot be powered by the alternator alone, probably not since the early 90's.
If the battery is weak, you have systems fail.
Not true at all, the battery is really only there to start the thing (basically). If it couldn't be powered by the alternator alone, (and needed the battery power also to run) the battery would eventually die.....think about it.......
Sent from the butt crack of California.
2016 Colorado 4x4 CC SB V6
AS level/lift 2.5" w/1" rear block, diff drop
275/70-17 Cooper AT3 on MotoMetal 970s
Scary, evil, black, warranty voiding catch can from the devil