[Goldstar]

I have a 2020 LT3 AWD Blazer with a sunroof and 20" wheels. Has anyone done any modifications to reduce the road noise? If so, what did you do?

 

[Papermaker]

I havent, but I plan on using my leftover Nioco from a previous stereo install in the spare tire area where there is no insulation.....

 

[Intell4u]

I have a 2020 LT3 AWD Blazer with a sunroof and 20" wheels. Has anyone done any modifications to reduce the road noise? If so, what did you do?

Make sure tires are at the recommended pressure levels and I purchased:
Winunite Upgraded 30Ft Truck Car Door Edge Guards Noise Reducing Automotive Door Rubber Seal Strip Trim with Side Bulb Universal Fit for Trucks, SUV, Aluminum Boat, ATV, UTV
DO NOT use it on the door edge, because you will not be able to close the doors. Use it on the lip of the beam between the front and back doors. You will see it, because it is the only place that you can attached this to. Make sure the bulb is facing out. I also placed it on the rear lift door edge, bulb facing in. Nice and quiet now. Here is the link:
https://www.amazon.com/gp/product/B08FDDB4MG/ref=ppx_yo_dt_b_asin_title_o06_s01?ie=UTF8&psc=1

 

[Goldstar]

I havent, but I plan on using my leftover Nioco from a previous stereo install in the spare tire area where there is no insulation.....

Did you install your Nioco yet? If so, did you notice a difference?