from rock auto
ACDELCO12F64{#19137297}Standard; w/o Groove For Tether
ACDELCO GT283 {Click Info Button for Alternate/OEM Part Numbers} Black GM Original Equipment
then Locking:
ACDELCO 12F40L {#19137302} Locking; w/o Groove For Tether
ACDELCO 12F40LA {#19137303} Professional
At least being AC Delco they have a chance of being proper ones.