[Ski-me]

You will always have two keys.....that's just how they keyed this era of truck. The square one is for the ignition switch only. The round one unlocks all the doors.

If you can't find the proper round key for any of your existing locks, you might be able to take all of the cylinders off and have a locksmith match a new key to all of the cylinders.

Or you can buy 2 new sets from LMC and take to locksmith to have all 4 matched to one key.

There is also a lock for the center console and the rear tailgate. When I talked with my locksmith, he said that each year, 89-91 had a very slight difference in the parallel groove so not all round keys will slide in to all door lock cylinders. A little confusing to me really.

I ultimately installed a new ignition cylinder and lock, as well as new door cylinders.