are there any in vehicle type gps that display elevation?

my hand held garmin vista does, but would like one for the jeep that does this, so i wont have to carry 2 devices just to see how high i am when in the mountains.

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Black 2006 Jeep Liberty Sport 4X4
My YouTube
http://www.youtube.com/user/satchelmcqueenvideo

I have a Garmin Nuvi 500 that works on and off road, biking hiking, fishing, includes topo and you can load additional maps

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2005 CRD "Ol' Blue"
Red Ryder carbine-action, two hundred shot range model air rifle with a compass in the stock and this thing which tells time.
My build page- RL Komodo Rear and TJM Front Bumper, armored, lifted, JBA Steel D30, 4.10s and ARB air lockers.