Mid 70's GM Truck lock questions

[XJPhoenix]

Hi folks!

We have a 1973 (I think, I haven't actually been able to get a solid answer on it's exact vintage) GMC truck that's been stored for two years, and both we and the fellow storing it have lost the keys. I haven't a clue as to where to get replacement locks fro the doors and ignition (which is on the column), and was hoping someone on here would have the encyclopedic knowledge of what might be compatible. ie - Are they pretty much the same from the model year range? Are they divvied up as GM made improvements? Any info would be appreciated.

 

[Johnnie Walker]

If its boxy, then should be 73-87/88? Pretty much any GM vehicle of that era should work for the steering column lock cyl. Pretty much any of those trucks/k5 blazers/Burbans, and I'm sure lots of others should work.

 

[XJPhoenix]

It's definitely boxy. It's just like the truck on the front of the LMC 73-87 catalogue. (Which I just found)

Hopefully, the parts are the same across the years...

 

[-96JeepSpeed-]

Call a locksmith.