PAIRING BLUETHOOTH

HI

i just bought a CHEVROLET TRACKER 2014

and i am trying to pair my iphone 5 with the car bluetooh radio.

the cell find the car bluetooth, but when i click on pair, it says that the IPHONE 5 is no supported to thar device.

please, help me, is there any way to update my bluetooth in my iphone? (thats what the told me in CHEVROLET, to update my cell, but my cellphone is up to date)

thanks

leonardo oneto