I need some help in developing some mods.

Which antenna is used by the GPS system and where is the GPS system located within the vehicle? I run a Laptop computer in my other vehicles with a data feed from a portable Garmin GPS Unit. Since the HHR has a built in GPS is there anyway to break out the raw data from the onboard GPS. This would eliminate the exposed mounting of a GPS unit. Oh, and also be fun to set up.

The long antenna next to the windshield, I imagine is for the AM/FM radio and perhaps the Cellular service that OnStar uses to communicate. The small antenna near the rear hatch I was told by the salesman is the MX Radio antenna.

 

Usually if the car has xm and OnStar, they both use the rear antenna. It's just more of a fin with OnStar. Not sure about the GPS but I'd guess whichever the OnStar uses.

 

my guess would also be the rear antenna for GPS.. that is if it uses gps i guess? i would assume "onstar" is a type of gps system .. i dunno. good luck

 

I believe having OnStar is what you would use as the "GPS" rather then having to actually purchase a machine. Although I think you have to pay extra for turn-by-turn directions???

Since you didn't say what year/model, the assumption is you have at least an '08 as they have XM & OnStar as standard options (the little black chingas thingy on the back is for both). The 'fishing pole' up front is for the radio (I replaced mine with a stubby).

If you have an '09, some have a USB port and perhaps that is where you can plug in the laptop??

What do I know?!
I have an '07 and could have used OnStar GPS!
I get lost in my own 'hood.
Have the PAL (and love it)--so don't listen to the radio much.

Welcome to the HHR familia.

@

 

i think you may be on to something. i wish i could help. seems like you could just have a pop out dvd in a radio that would display gps also. i've been shopping for one , but no luck yet. they do make them , but the ones i have found were to pricey for me. i am also looking if someone can share software for tuning. they charge way too much for tuning also. the same goes for onstar - it costs to much per month -when all you get is text directions-no video. it may void warranty , if you fiddle with too many wires. i am pretty sure it is the one on the rear for xm. my 08 has both xm / onstar , i use niether. i have fta sat at home -all free payperview , i share files , i paid for my equip , just like i paid for my hhr , that should be enough. actors/musicians/athletes are over paid. maybe i'll get free gps when they start putting advertising on them.