Whats the best way to discreetly run RCA cables from a headset to an Amp in the trunk in a 2005 impala? I just installed a new stereo and 4 new speakers i tested it all out and everything is working great!...now i just need a way to discreetly run my RCA cables i need to cut a hole in my dash or anything? cuz there really isnt a lot of space in that little crevice to that my double din deck is in...and i have a GMOS-01 in there also so its cramped behind the radio. So i need a really convenient way to run my wires

 

under the trim in the bottom door sills.
pull up the rear seat bottom, unbolt the seat back and push it into the trunk.

 

RacerX is right. You will need to flip up the seat cushion and remove 5 nuts holding the seat backs in place. It's a pain in the ***, but it's the only real way. You'll need a deep 3/4" socket to do this. Two of these nuts hold the seat belt buckles in place as well, so when reinstalling, make sure they're facing the same way or your seat cushions won't sit right. Once you have all 5 nuts off, pull seatback up and away from the rear deck. Go ahead and run your wires thru. Make sure they aren't in a place where they could get crimped when the seatback is replaced. Then put your seatback in place and reattach your 3/4" nuts. Remember to make sure your seatback are out from behind the seat. Fold down the seat cushion and, as RacerX said, run the cables under the doorsills. A lot of people reccokend you run the power cable down one side of the car and rca's down the other to avoid interference. Idk if that would actually be a problem, but just to be safe, that's always how I've done it.... Once you get the RCA cables run in the front door sill, tuck them up under the carpet to avoid catching them on anything and to keep them from being seen. Then just look for a big enough hole to run them up behind the dash and pull them thru far enough to connect em to your head unit, and voila! Good luck!

 

Sorry, I meant make sure your seatBELTS are out from behind the seatback.