gm current draw

My wife has a 2000 chevy venture.  It has an ultra start r/s with a PKG4 security bypass(all disconnected right now).  I disconnected it all because she started having starting problems.  Before i disconnected everything I had the battery charged and a load test done on it.(passed).  I took it home installed it and went back to autozone, they did there charging test.  They told me I had a negative draw during test, but charging test was good.  They also said that during the test that something did drop down to 10-11volts for a second during test.(he had never seen this before)  I borrowed a dmm that checks DC amps.  I did a parasitic test with vehicle off and started out at .6-.7amps(assuming that reading was with bcm awake)i then cut my grass, after that my reading was down to.2amps(bcm asleep?).  My doors were open the whole time but i latched the doors with screwdriver, so no dome light was on.  I removed every fuse, maxi fuse, relay, circuit breaker, one at a time, this reading never changed.   What is my next try or option?  Should i recharge battery and take it somewhere else for a charging test or is there something i'm missing. If  i disconnect the large alternator wire during parasitic test will this tell me if i have a bad diode or not?  I really do not want a 900$ bill from any BS dealer.

Thanks, I will try the multiple fuse possibility and remove all alternator wires this time.  This is very frustrating.