My chevy camaro drains the battery in three days?

I have tested the car for a short by doing the following but, I did not find the problem. I removed the possitive cable waited for PCM to go to sleep... placed a fluke meter set in amps, positive lead on cable and negative on battery post, my readings were minus 6.75 and I when i reversed the cables my readings were plus 4.60 I pulled all the fuses one by one in both modes inside the car as well as under the hood the numbers never changed. I was expecting to see the meter go to Zero as I was pulling the fuses out to find the problem but, was unsuccessful. At this point I'm frustrated as I ve not found what's causing the draw in the battery,If you have any tips on how should I continue looking for the short please reply.