I installed a D3 into an 06 HHR, and I don't have any sound from any source. I have installed an Ipod adapter and bluetooth adapter. I have done a search through the forums and didn't find any answers that helped me. If anybody has any suggestions I willing to listen. I'd appreciate any help.

Are you using an external amp, a factory integrated amp, or are you running the speakers directly off the unit?

It has the factory Pioneer 7 speaker system with it.

The most likely culprit is the interface with the factory amplifier then. How does the amp get the audio signal? And what is used to turn the amp on? Does it require the blue/white amp turn-on to wire be used?

I found out which wire turns on the factory amp. Could I just splice that to the remote wire for my after market amp for the subs?

Yep.

I got it all working now. I appreciate you help.