I routed mine underneath the dash and wired it onto the metal on the inside of the door. When you open your car door its mounted on the metal thats on the hood side. Just make sure the door doesnt hit the antenna when you close the door. Its one of those make 1/2 inch highth by 1 inch length. Its fits perfect in there hidden away and grounded. I hope this helps. That is on my Bonneville GXP and on my Yukon XL Denali I ran the wire underneath the dash and ran the wire through the fuse box and brought it up and mounted it on my front dash with the metal sticky mount and it magents to it on the dash, Both are alpine GPS.