We just found out my wife's used 99 Rodeo has locking lug nuts. We were not given a key by the dealer. Do these come standard on Izuzus? If so, where is the hiding place for the key? If not, can I purchase a skeleton key? Luckily we found out when we took it in to get the tires rotated for the first time, and not out in the desert somewhere with a flat!

usually found in the glove box.

Your dealer should have a key you can buy.