Suction cups work great Backlight works great. The only problem is that the lights themselves don't match. I have HMS Yukon 2017 so my guess is that it won't fit in any larger GMC vehicle as well as the Tahoe and other large interior SUVs. I went to insert the brackets and there was no hole where I needed to insert the screw. It's very limited where you can adjust it and it doesn't fit my car. If you're looking for something that will fit in a larger car, I recommend SpeedTech Lights.
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