You can do a couple things.

1) Remove that door lock and take it in. The key code is stamped on the cylinder there. More than likely you'd need the VIN also. If you bought the truck new, they would've given you a little tab along with your keys that has the key code on it. They started doing this with rigs after '82 or so.

I would call the dealer and ask if they can look up the key code based on the VIN before I started tearing things down, that way your rig remains secure. <img src="/forums/images/graemlins/kewl.gif" alt="" />

2) Swap the door locks from the pax side, temp or permanently, up to you. I take it the keys work on the pax side lock?