The template must be centered according to the dimensional grid applied to the template. After that, securely fasten with masking tape or tape. Before using, check the size of the hardware to select the correct drill. Use sealant during installation to prevent cab leaks. Attention! When installing diode lamps, you do not need to make a large diameter center hole, as in OEM, a hole is enough through which the wires will pass. I also have templates for 1st gen Dodge Rams and Ram Chargers, for all generations of Chevy Silverado 2500 3500 Duramax, and all generations of Ford F250 F350 OBS and Powerstroke.