I had the same issue at the beginning of this past winter. I used a bungee to keep the hatch closed, bumpy roads. I ordered the oem part of ebay for about 240. Dealers up here wanted $375+. I ran the truck with the heat on for a bit to warm the sealer on the plastic sheeting covering the gate, replaced the part with I think 3 10mm bolts. People have said that you need to reset the brains on the computer in the back of the rig. When I installed mine, since it was running it worked right away. Its a piece of mind to have a brand new part in there. I tried spraying the crap out of it before hand to try to get the old one to catch but there is risk of getting liquid into the electronics and it never worked anyway.