Retain RSA/RHVAC

[nolan004]

I have searched the Internet and have found absolutely no information about whether or not I will lose my rsa/RHVAC module when I install an aftermarket head unit. Any information would be very appreciated.

 

[Me007gold]

You will lose those features if you do not use a GMOS-xx(the xx correlates to a number, that depends on what year options your truck has) adapter or equivalent

 

[nolan004]

I have an '03 with onstar but not Bose.

 

[Me007gold]

I have an '03 with onstar but not Bose.

Go to a website like Sonicelectronics or Crutchfield, they will tell you want you need to install in your car to keep things working correctly.