GM-GMC: CURRENT DRAW, slow drains, battery connections

Question
HOW MANY AMPS OF CURRENT DOES IT TAKE TO DRAIN A BATTERY WITH KNOW ACCESSORIES ON

Answer
This is a wide answer question ???
It depends on allot :

Age of Battery
Amperage of Battery
Battery Connections
Battery or Vehicle Ground
You can have a bare wire up against the frame : then it slow drains . You can leave a light on a vehicle ( interior light )
It can be DEAD in less then 6 hours then you can have another battery and leave the light on for 4 days and still start .

What exact is going on with your vehicle "

You can bring your battery or your vehicle to Auto Zone . They can test your battery and or your charging system on your vehicle .