Does anyone know if the stock '06 stereo has a pre amp out?

Depends. Ill speak from what I know.

The 04 Series Single Disc AM/FM cd does not.

Sounds like your trying to hook up an amp, look into getting an inline filter that will give you your two RCA plugs from the rear 6x9's. www.crutchfield.com

I think its under AMPs you'll find this part.

Thank you Hyperfox.

No worries man. Were all in this together.

I have one if you want to buy it ($12):2cents: . Its from radio shack and has worked good and has a gain control to turn signal up or down. I just wired into the rear deck speakers and ran power wires(switched and battery) to the back. Let me know.