I am planning to install cab marker lights on my 2015 Silverado 1500. (Why? Because I think it looks cool.) I have the GM lights and wiring harness, I know how to locate the lights in the right position on the roof, and I know how I’m going to make the required square holes.
What I need is a little bit of information about how the clips on the bottom of the lights engage the underside of the roof. Below are a couple of photos of a mockup I made, showing the bottom of a light installed through a square hole in a piece of sheet metal. As you can see, there is a steel clip with four legs, one at each corner of the hole. Tightening the bolt in the center of the clip pulls it towards the body of the light, pressing the legs against the underside of the roof.
Are the clips tightened until the legs are “just snug” against the bottom of the roof, as in the photos? Or, are they tightened all the way down, splaying the legs out away from the hole? Neither of these seem very secure. Alternatively, is there some sort of retainer that I don’t have that keeps the legs from splaying out as the clip is tightened?
What would be most helpful is a photo of the bottom of a factory-installed light (why I’m posting this in the 2500/3500 forum).
Thanks in advance.
