Rockford Fosgate used to make a custom fit sub that would mount under the 2nd row seats. No longer manufactured. If you have one to sell, let me know. It fit the H2, Tahoe, Yukon and Avalanche.

Part: UP-GMH2SUTP-10B

 

Contact>>> A & L Imports Inc

 

I didn't see them mention the sub in those videos... did I miss??

 

Did you contact A & L Imports?

 

Sending them a note now!