"Compatible GM Navigation Unit for 2007 Chevrolet Silverado LTZ"

2007 Chevrolet Silverado LTZ Dashboard View

I want to add an in dash navigation unit to my 2007 Chevrolet Silverado LTZ? Is there a way to buy the GM navigation unit and have it compatible? I have the bose speakers and onstar. My main concern is where and how to mount the GPS antenna? If i get an aftermarket navigation unit will I loose the stock xm antenna? Any help or suggestions will be appreciated, thanks.

Answer: Technically, GM issued a bulletin, instructing dealers NOT to install navigation systems in vehicles not originally equipped with that option. You can still find dealers that will do it but many will tell you it can’t be done or that they won’t do it.
If you’ve got factory XM and want to retain it, you will need to stick with the factory radio. (Actually, the factory XM antenna does not plug into the radio. It plugs into a remote XM tuner, which is, in turn, connected to the factory radio.)
In addition to the radio, you will need a navigation DVD and the navigation antenna. I’ve seen forums where people have done this and some indicated they needed to add a wire for the vehicle speed sensor so the navigation tracked smoothly. If you haven’t done so, you might want to check www.gm-trucks.com They might have a write-up on it. I can’t remember.

You can find the complete set-up for around $1000 if you look around enough. I know you can get the nav antenna here:

http://replacementradios.com/product_inf…

Keep in mind that there are two different versions of the navigation radio. One plays DVD video and is designed for the rear seat entertainment (rse) system, although the rear screen is NOT required to use this version. (In fact, you will be able to watch DVD movies on the navigation screen when the vehicle is in park.) If you don’t think you’ll ever need rse, go with the other version to save a few bucks.