My rear gate lock froze up this winter from salt sand etc, gumming it up. Removed the lock and soaked in liquid wrench all day. The darn thing was still jamned up. I brilliantly held with vice grips and proceeded to ignite with propaine torch : D to my satisfaction, fire blew out through both ends, dangerous but cool. Put my key into the lock again after it cooled some. Tadaa! Problem solved. Lock works great again. Dryed off all liquid wrench oil and puffed with dry graphite. Re-installed. Just thought id share this redneck fix for ya peeps that might have the same problem.