I try to start my 2000 chevy tahoe limited and when i turn key over it just clicks then everything shuts down and the post that holds the negative cable to battery pops out and starts to smoke. and it started doing it after it left me stranded in middle of street. when it stalled it melted the metal inside the threads of the negative post. what could it be and what to do to fix?

SOURCE: clicking noise when trying to start car,battery is ok, wont start

That Clicking is the Battery causing it not to Start. You need to Replace that Battery or at Least put a Charger on it for a Couple of hours to see if you can Salvage it for a While.

SOURCE: chevy tahoe won't turnover, power

Next time it won't start turn headlights on and see if they dim when you turn key to start, if they dim its most likely starter, if they don't dim possible starter switch, Have you tried to start it in neutral position? Try that, if it starts in neutral than its park neutral switch, if not could be starter switch, Just make sure you chk. all fuses and any relays associated with ignition first.

SOURCE: remove inside passenger rear door panel 2001 Chevy Tahoe

I would try to test the ground the motor first, also you can duplicate the ground with no consequence. If the motor is real dirty/ dusty, you may be able to clean it and ck the brushes in it while you are there.

SOURCE: chevy cavalier z24 theft system light on

This is a easy fix. Lucky just follow the procedure and your car will start. This is a theft system shut down.
The procedure is. Disconnect battery for a minimum of 30 seconds. ( one post is OK. )
Reconnect battery and get in the car and start as usual 1 time only. When it starts and stops letthe key just return to run position as if it was running. Do not shut it off and if you do you must stert the procedure all over again. i usually put on the emergency brake before i start and that shuts of the driving lights etc.
Just leave the key in on running position and go have a coffee. it takes 15 to 20 minutes for the car to recycle the system. When you come back to the car the flashing theft light will either be off or solid.
Try to start again. If it doesn't go shut it off and turn back on and start as usual. It will start and run and stay running.
The reason you have this problem is something electronic was disconnected whe the battery was hooked up. always disconnect the battery before you touch anything electronic and you will not have this problem.

SOURCE: i have a 2001 chevy tahoe wont start

have a friend listen for the pump to come on. if it does probably a clogged filter. if the pupm does not come buy some starting fluid . open the air intake for the air filter. spray some starting fluid into the intake and see if it starts. if so you have a feul delivery problem. most likely the pump