This template is a direct copy of the factory drill template for the OEM Z51 Spoiler and OEM High Wing Spoiler from General Motors. This is a paper copy of the exact template that is provided with the factory High Wing Spoiler. High Wing spoilers, Low Profile spoilers and Z51 spoilers use the exact same mounting locations/holes.
General Motors is an OEM manufacturer. GM designs and creates the vehicles and the parts for them for makes such as Buick, Cadillac, GMC, and Chevrolet. All GM branded parts are OEM standard quality components and were designed and manufactured to either be on the vehicle from the factory or purchased after the fact as an accessory.