RE: What is RDS?
i believe the rds has a data bus which controls switched power and the door chime. If that is true, then it will not affect speakers, but if you change the deck, you will need to bring switched power in from somewhere else.
2003 4.3L 2WD Blazer 2DR K&N air filter
Alpine S-type speakers in all 4 corners
Damplifier behind all speakers and in cargo area
Alpine CDA-9856 (iPod interface)
Alpine 10" type S Sub with 400W Alpine MRP-M450 amp www.secondskinaudio.com