Ok, so it wont hit 2nd by itself. You’re sun shell is broken. Stop, dont drive it anymore. Have it towed to a trans shop because since the sun shell has separated from the sun gear the shell is turning and tearing up the inside of the transmission case. Dont take it to a chain type shop. Find a smaller shop, preferrably one that builds heavy duty versions of the 4L60E because your transmission had many issues from the factory and will need certain upgrades. Remember, you get what you pay for here. You’ll probably smoke one of those Auto Zone $900 cheapies so stay away from any auto part store specials. Have it built with some basic upgrades. My BASIC rebuild on one of these is a heavy duty sun shell, upgraded 3-4 stack up (3-4 clutches) valve body upgrades for the TCC regulator valve, and some pump upgrades along with new electronics (EPC, shift solenoids). As far as your electrical issue, you might want to have the trans shop do a basic charging system check on it, they should be able to handle that. Find a good trans shop and get it towed. Let us know what happens.
transman