It will definitely handle the power, I tried to blow it using an old Kicker ZX1500.1 and it wouldn't blow after more than 20 minutes. I believe it's a dual 2 ohm but I could be wrong. You can take a look in that Duramax build thread and see how I wired it up in my friends' truck still using the stock Bose system. In my Tahoe I replaced the head unit so I didn't have to tap the rear speakers for a source.
Am I reading this right?? The stock 2ohm dual voice coil sub took 1500 watts??? I could not find how you modified your friends duramax sub. I saw the Tahoe build and the duramax complete center console sub replacement.
Thanks