Fixing problems here.

The square key should do ignition cylinder and door cylinders and the round key should do trunk, glove, and console if equipped if I recall correctly.

I believe my 72 currently has one square key that will do the ignition, one round key that will do the trunk, and no keys for the glovebox and console.

Seems like I need to:
1. Take the square key from the ignition and the door cylinders and have them keyed to the square key.
2. Take the round key and the console and glove box cylinders and have them keyed to the round key.

As I understand it, the steering column cylinder is a real pain, but the others are easier to pull. Fortunately, I don't think I need to pull the steering column ignition one with this plan. Am I correct in all this?

 

All 70-72 cars use rectangular key for ignition and doors and round key for trunk, glovebox, console, and tailgate window on wagons.
The ignition lock cylinder is very easy to remove once you pull the steering wheel. This website shows you the steps, just stop at the step that pulls the lock cylinder.
1970 cars used a "J" square key blank and a "K" round key blank.
1971 cars used an "A" square key blank and a "B" round key blank.
1972 cars used a "C" square key blank and a "D" round key blank.

 

Ok, well, I have a nice sport wheel to put on, so I should do the lock conversion at the same time. I think I've seen lock sets for sale around here before.

 

Im assuming you have a square key for ignition now. You can take that key ignition key and see if it slides into door locks. If it does just remove door locks and have them keyed to match. If the key does not go into door locks then the door cylinder plug needs to be replaced then matched to ignition key. Any locksmith can do this for you. If you cant find one I can do it but Im in AZ.

 

Same goes for the console, glove box. I should have those cylinder here.

 

I also have the original GM headed key blanks

 

Good advice. I'll try. However, my ignition key is not a GM key blank, but aftermarket. (It may well BE the blank's pattern, just not GM branded). I'll get back to you.

 

If you find d a good local locksmith they can do this procedure.You stated that your ignition key was not GM original. If your interested you can send 2 pictures like this and I can decode by site and send you a GM key with the correct cuts. PM if it is safer.

 

I have a good locksmith in Terre Haute (stuff gets stolen up there.) Door locks are keyed to GM K round keys per my keyring sitting here now that I'm home. Ignition is keyed to a B44 E key, which does say it on there in a different way than GM. E is 1969 or 73 it says on this table. I do not have key for console or glove lock.

 

So they're all wrong. Those are 1975-later door locks that use the round key.

 

Ok good. He will have the universal plug to change out cylinder and make your E key work them. Bring him the glove box lock or console lock and they will have a code or make your trunk key fit them. You might spend around 40 to 70.00 depending how much he has to do.

 

When I was in Chevy Parts the police cars of that day were keyed so
that one key fit everything. It made things real simple if there was a
critical situation. I did my sleds like that back then. It made carrying
keys to everything on one ring a lot easier.

Just sayn'
Owen

 

Yeah Joe, this car was made to work by whoever restored it by whatever was there, I think. Good thing it's pretty and goes like the hammers of hell, otherwise I'd be annoyed.

Haywood, I may just acquire a set of locks and keys and replace all.

Owen, not a bad point.