Stereo upgrade plans

[Graham325]

I recently purchased a 2002 tahoe and Im wanting to upgrade the stereo, it doesnt have the bose stereo but it does have onstar, from what Ive read on here it says I need to use a aftermarket harness to deal with the onstar and door chimes but I was planning on running now wires and all for the door speakers and sub.

Basically, what will happen if I dont use the onstar adapter?

Heres what Im planning

Head unit

http://www.sonicelectronix.com/item_81023_JVC-KD-X50BT-Factory-Refurbished.html

going to this amp
http://www.sonicelectronix.com/item_25323_Planet-Audio-AC1800.5.html

Front & Rear doors
http://www.sonicelectronix.com/item_72201_NVX-VSP65KIT.html

http://www.sonicelectronix.com/item_69252_NVX-NSP65.html

and this sub in the factory box

http://www.amazon.com/SD-2-D4-Sundown-4-Ohms-Subwoofer/dp/B00EVZLMU2


Let me know what yall think

 

[ccapehartusarmyINF.(ret)]

sounds good i didnt have the onstar on my vehicle though (not a fan of things like onstar its like free pass for uncle sam to know your whereabouts at all times)
just a couple tips because its seems we have similar taste in vehicles as well as amps
make sure all your ground and power wires run seperatly from the RCA wires youll get a very distinct alternator whine, also before you do anything unbolt the back seat and pull up all the carpet and then lay down your wire I learned the hard way i tried fishing all the wire under the carpet and it was a pain

my setup is a
clarion cz702 HU
front doors have 2 6.5 pioneers
and rear has 2 6.5 clarions
Planet audio 1800.5 powering my door speakers
planet audio AXIS class d p3200 sub amp power two infinity model 1262w 12 inch DVC subs
ive upgraded my entire charging system with 0 guage wire along with a 250amp alternator and a red top