These are OEM new old stock. They were obtained in a buyout from a GM assembly plant when they changed over model years.
Since they were for installation in an assembly plant, they are bulk packed loose with no individual packaging or instructions. These are what was used in the original vehicles and have been stored in a warehouse since then; you can't get much more OEM than that. See the interactive application chart above for the models that this fits. Please use the NOTES: IMPORTANT PART DETAILS section to confirm fitment. This section contains vital information that can include and exclude certain applications.