If it is a standard full extension slide the drawer out about half way, there will be a little black "finger" in the rail on each side. One side you need to push down, the other pull up. When you have them in the correct position the lock will release and you can slide the drawer out. Sometimes it takes some trial and error, if you have any tension on the locks from pulling the drawer while releasing the lock the lock will not release.
Jim, Julie and Rags the boss.
2015 Dodge CTD 3500 Bighorn pulling 2014 Wildcat 317RL. Life is good when spent with family and friends.