They definitely did their job and eliminated the hyperflash on my Chevy Silverado 07 (new body style). You need self-tapping screws. I would also suggest soldering them on to make sure you get a good connection. As long as they are installed correctly, they will work! I actually added some wire so if I need to remove the headlight again it gives me extra room to change bulbs. I also used self-adhesive tape to seal the joints. Locktite has some very good self-adhesive tapes.
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