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  1. I've read through quite a few battery drain topics on here but none seemed to have my specific issues/symptoms. I bought my '06 SSS a couple of weeks ago, it had sat for about 8 months. I was aware of a power drain issue taking 2-3 days to flatten out the battery. The only symptoms initially were the radio, clock & instrument cluster lights staying on after turning off the engine & opening the door along with the battery light coming on. After doing my initial fill-up, the 4 gauge cluster group read high, battery gauge was jumping & hitting 19v, speedo, tacho & tranny temp were ok. Two days ago I drove it to work, 8 hours later the battery was dead. Got a boost, the gauges reset correctly but the other symptoms persisted... There's also an aftermarket subwoofer/kicker/amp setup along with a cd changer, the woofer doesn't woof & the radio Aux function won't switch to the cd changer. Could be an entirely unrelated issue though... aftermarket amp power is disconnected for now I did a parasitic power draw test with a multimeter, had a major drain from the radio and smaller ones from the amp, onstar (info fuse), IPD/DIC & IGNE circuits. 23 amps total. I took apart the dash, center console & bottom door trim, inspected all the aftermarket wiring for the amp/kicker and the cd changer (seemed güd), the only wire i didn't trace all the way back was a brown one coming from the cd changer & heading up to the steering column along the main aftermarket amp power wire. Then I took out the instrument cluster & radio, disconnected them and plugged everything back in. Went to do another parasitic power draw test in case it was caused by a bad connection I had shaken up... no more power drain! It read 1.3 amps for 5 minutes, dropped to .08 for a few seconds then went to zero. Connected the battery, started it, no battery light in dash, gauges reading true. Turned it off, opened the door & the radio turned off along with the dash lights. So logically here, bad behavior (radio, cluster lights staying on, gauges suddenly to the right) - partially reset by a drained battery (gauges reset) + sudden instant power drain involving radio, amp, onstar & DIC circuits - corrected by wire wiggling & hours long battery disconnect. Does this point to a bad BCM or am I just dealing with a bunch of separate gremlins & got lucky today? I'll try and get a scan done this week, see if any bcm codes pop up (apparently none might even if?!).
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