Electrical problem
2002 Buick Rendezvous 6 cyl Two Wheel Drive Automatic

i am having an issue with the battery dying overnight,completely.i opened the doors and latched the doors.with the negative cable disconnected i installed my meter and found a 1.9 amp draw,wow. it should be at or below .050 right? i waited for an hour before pulling fuses,in case the system had to go " to sleep". after pulling fuses inside and under the hood i found that the interior fuse #37 drops the reading to 0.160.also when i disconnected the radio with the fuse in it i had the same voltage drop change.i don't have an owners manual for this car so i dont know what fuse 37 powers. is there a common problem with the body control module on these? or where else should i be looking? thanks in advance!!