I used RAM mounts purchased from Cyco Active, a local dealer of GPS units and mounting accessories. I used several parts from them. Click the link above to go to the page that has the parts I used.

Parts list:

This photo also shows the GPS power wire. I routed it down through the defrost vent, behind the dash and over to the passenger foot well where I connected it to an auxiliary fuse block.

i dropped a string down through the vent first, pulled it through, then taped the string to the wire and pulled the wire through. You might also be able to use a coat hangar and poke it up from the glove box area to the vent, then tape the string to the coat hangar and pull the string through.

My GPS wire was bare wire on the end and had no cig lighter plug on it, which is likely the only way you will be able to fish the wire down through the vent, unless you want to cut some of the mesh dividers out of the vent to enlarge it. Since my game plan was to hardwire the GPS anyway, i ordered a spare cable with no plug on it.

The only really tricky part is once the wire or string drops down behind the stereo is getting it far enough to the right side (towards the glove box) so you can grab hold of it.

I chose Cyco Active because I've bought a lot of GPS accessories from them in the past, and like to see my money go to local vendors who support our sport. They are located in Seattle, WA. If there's any RAM parts they don't have in stock, they get them fast since RAM is also located near Seattle.

The folks at Cyco Active USE GPSs on a regular basis and are familiar with the in and outs of using them for back country travel.