diesel tank cap lock

[Bad Max]

I like to put in a diesel cap lock on my 07 LBZ Duramax, does anyone know where I can get this lock cap for the diesel tank? Thanks
Bad Max

[DmaxMaverick]

Stant part # 10591. You can get it at chain parts stores or have them order it for you. They will also have a similar looking cap for gassers off by a couple numbers. They won't work. The vent is backwards.

Napa has them online for less than $10. Napa part # 7032103.

[Bad Max]

Thanks, I'll check them out.
Bad Max