I currently drive a 2002 SLE. I want to add subs to my car with out changing anything factory... Can it be done? I know nothing but snap this here and hold that there when it comes to wiring so bare with me please.

yes it can be done. you will have to run the power wire for the amp from the battery to the trunk. if your using a stock deck you will need to get an output converter. for that you have to snip a set of speaker wires. this is necessary so you can hook up the rca'*. if you have an aftermarket deck it will be simple because it should already have rca'* on the back. not a very hard job to do. hardest part is finding a good place to run the amp power wire. can be time consuming, but not too hard.

well his battery should be mounted under the back seat which makes things nice because you don't need to run as thick of wire as most cars, the output converter will be the easiest way to go

oh didnt know that. that should make things really easy then. i have a 97 SE. try running 0 guage wire through that and still make it as unvisible as possible. its almost impossible. lol i did a pretty good job though. but yes an output converter will be the best way to go if your running a stock cd player. youll need to cut the wires going to both back speakers, and connect an extra wire out of each one to run to the converter if you want to do it right. an inline splicer would work, or you could just use butt connectors also.

Well, its fairly easy. All you need for this install is a low pass convertor with remote trigger that hooks up to the rear speakers. Amp wiring, and your amp and sub. There are online guides for installing amp/sub combos to factory stereo systems. I have done 2 and they ended up sounding great! Good luck with your install!

anymore questions you have don't be afraid to ask

Actually alot of the sub amps today come with the speaker level input already on them. My Alpine does and i just tied into the rear speakers and connected to that. Makes it all a whole lot easier.

i bought my amp back in 04 so i noticed i had to buy the converter so i did. should be here by monday. i work with acrylic so sometime in the comming weeks i'll build my own clear box with blue led lights for a single 12inch sub. should look nice

When i first bought my bonneville i left it stock stereo too with subs hooked up. didnt sound too bad either. Still sounds way cleaner with my jvc headunit though.

I just put a sub/amp combo on my friend'* GT Grand Prix. Sounds awesome but, I did notice when I put the same CD out of that into my aftermarket stereo in my Riviera. The sound quality did jump quite a bit. So, I am in agreement with you. But, on a budget, this would be the way to go.