Hi everyone I just bought a brand new 2006 Chevy Monte Carlo. I'ma fan of awesome car stereos and I've currently got a custom installed system in my 2003 Grand Am that myself and some friends did. The problem I'm facing with the new car is I would like to keep the factory head unit in for the moment but I would like to install new 6x9s and hook my amps up to the headunit. Eventually I would like to get a custom headunit but for now I'd like to use the factory. I can wire everything myself I just need to know what kind of wiring harness or adapter and other items I would need to make this possible so I don't take the chance of messing anything up since it's a brand new car. If anyone could help me out I'd appreciate it. Thanks!

 

That should help a lil.
https://montecarloforum.com/m_40423/tm.htm
I know if you look on ebay, there is Dash install kits, and wiring harnesses. i believe the speakers were the hardest part..lol

 

If you want to use a aftermarket amplifier with the stock head unit, you will need a LOC (Line Output Convertor). Wire it to the 4 wires for the rear 6x9's (2 positive, 2 negative), and it will convert it from speaker wire, to female ports for RCA wires. Then, just install the amp as you would with a aftermarket amp. You will have to run the remote wire to a switched line, or more commonly a fuse, like the radio fuse. That way, when the radio is turned on or off, the amp will turn on and off also.

 

you can pick up an loc at any place that sells car stereo stuff thier only about 15-40 depending on where you go