"Archived copy"(PDF). service.gm.com. Archived from the original(PDF) on July 16, 2017. Retrieved January 13, 2022.{{cite web}}: CS1 maint: archived copy as title (link)
"Archived copy"(PDF). service.gm.com. Archived from the original(PDF) on July 16, 2017. Retrieved January 13, 2022.{{cite web}}: CS1 maint: archived copy as title (link)