Lets see if I can explain this. Engine runs fine, but the dash board lights and head lights flicker, battery is dead after 12-16 hours of sitting. Battery and alternator tested fine at auto shop. I placed an Ammeter between the (-) terminal on the battery and the (-) cable. I expected for there to be a parasitic draw, but I do not know what the tolerable range is. When the ignition is just turned off, I get a reading that fluctuates between 1.5-2 amps. After about 30 seconds it drops to 0.95 amp. I know that 0.05 amp is drawn by some aftermarket accessories, they are tied into the 30A aux post in the main fuse box under the hood. I have traced the rest to a 50A fuse under the hood labeled INT BAT. Am I headed in the right direction chasing this stuff down, or has anybody else encountered this problem?

Update: The battery died today and I was jump started by another vehicle. I let my Blazer run for 20 minutes, shifted into drive and it died. Started again and had to keep my foot on the gas, when I took it off the Blazer stalled. It stalled about 4 more times then kept running while shifting gears. hope she starts again in an hour when I have to go to work......

Take it to another shop to have the battery/alt tested...
1.5-2 amps is very high if the key is out and lights off etc...check to make sure glove box light or somthing dumb like that isnt staying on....