So correct me if I'm wrong,
There are 3 things I can think of when looking to purchase a Chrome Locking Gas Cap:
1)Wheather your Tank is "Vented" or not.
2)Whether it has an EEC System.
3)The size of the neck in relationship to the Cap.
I'm looking at the 3 Major parts distributors for GMC parts and they List exactly what I'm looking for in a Gas Cap only it is for 67-71 GMC.
I have a 72 GMC.
Unless it was a Screw on type cap, I feel that as long as I follow the 3 guidlines above, I should be OK..............correct?
Roger
"RATIKLE"