Adding Subwoofer to 2018 Sierra with Bose

[JMoney12]

Looking to add a subwoofer to my 2018 Sierra 1500 with Bose system. I know an amp pro is my best option but I’m hoping to avoid it and buy a Kicker Key 500.1 instead. Wondering if anyone else has done this? I was going to tap the subwoofer channel at the amp and let the Kicker do it’s signal processing. Will it be able to restore the bass rolloff? 
 

also, any suggestions for a 2ohm dvc subwoofer that pairs well with the kicker? Going to add a single 10 sealed enclosed under the passenger side rear seat. I was originally thinking a Sundown SLD or SD4. 

[UrbanRage]

I installed the same Kicker that is linked below in my 2017 with the Bose system. I'm sure you can find it elsewhere, but this will give you and idea as to what it looks like.  The installation was easy and besides running the power through the firewall it was plug and play. 

 

https://www.shopchevyparts.com/gmc/2018/sierra-1500/electronics/2018-sierra-1500-crew-cab-subwoofer-kicker-200-watt-subwoofer-system-all-audio-systems-p-92297288.html