About 7 years ago I added the 6000NEX and now the W8600NEX.   The truck is a 2006 Chevrolet 3500 with Bose amp removed and speakers were upgraded then.  I don't know what interface for steering wheel buttons  (but zero amps added, just the head unit)...... But would I really need new interface stuff?  (I also had the super-double-secret hack done to use when not parked with ever-brake on)

and I've been posting since 2009.....