How can I tell if my truck (92LS) had keyless entry from the factory if I don't have any of the remotes? It has power locks with just one switch on the dash for lock/unlock. It was available in 92, wasn't it?

Also, if it is in there, is it possible to buy and program remotes?

Thanks


88 Trooper, 2.6 5spd
89 Trooper RS
92 Montero