This is what I was waiting for.jseck2 said:I did it about a year ago, so I don't remember all the details.
I also bought a JVC compact sub that will fit under the rear seat but haven't gotten around to installing it.
Adding an amp to the factory stereo is not much of a problem. A line-out converter will do the trick. Onstar, chimes etc are still functioning. Adding an aftermarket receiver plus amp is a different case. There need to be some wiring modifications to the GMOS LAN adapter to make it to work properly. To hear the blinker you need to add a separate SPDT relay...i do not need to hear it. To hear Onstar, door chimes, etc you need to install another separate speaker just for this purpose..ugggh :banghead: I may not renew Onstar so it's okay for me (i have aftermarket nav system). One other problem I'm experiencing is the popping sound each time i release the parking brake when the radio is on. I make a mental note to release the parking brake each time I get on the vehicle and before I start the engine. I'm working with Metra on this one.The radio is stock. There are no line level outputs that I know of- so adding an amp would require speaker level inputs. I considered upgrading but didn't want the hassle of the converters for GM LAN bus, warning chimes, etc.