2007 Sierra Stock Stereo Equipment

[myko5]

I was just curious what kind of set up I have in my Sierra. The RDO code (UQ3) states I have SPEAKER SYSTEM,PERFORMANCE ENHANCED AUDIO ENHANCED SPKR SYS. I clearly have no clue what that means other then maybe its an upgraded speaker system as opposed to the cheaper standard ones. To my knowledge its not the BOSE system as if I remember correctly, there is usually a Bose badge or emblem on the speaker grille.

Basically to sum it up, without ripping out the head unit and speakers, I was wondering if somebody could fill me in on what brand the set-up is. Pioneer?

 

Also, are there any factory amps or subs that can be upgraded also?

 

If anybody happens to know what might be in a 09 traverse I would appreciate it too.

 

 

Thanks

Mike