Its not that simple,,, there is no amp draw for 3-4 days on these cars but for some reason if you don't start it the module grounds out and drains the battery.. It is a mystery to me and it only happens in factory 6,6 Pontiac.
I suppose you could try a pertronics unit but it may be something else or a combination of things. If it were just a simple continuous drain it would be easy to find. I spent my whole life fixing complicated electronic and electromechanical equipment and never did figure this one out. spoke to many mechanics who told me the same thing. When I moved the motor to another body (firebird) the problem stopped...?????
All 5 of my 6.6 ta did this.