PNW

For those wanting to know how to remove the Air vent on the hood (Hood scoop) on the 2020 GMC Sierra 2500HD AT4 Once you take the hood insulator off, you will need to remove four nuts. The two front ones will be easy to take off with an 8mm deep socket, the other two in the back will need about a 5in deep socket. After the nut removal, there are 11 clips that hold it in place. You will need to pop them out. Most of them are not accessible from underneath. So using a towel and some upholstery tools I was able to go between the hood and the hood vent, slide the tool over to were the clip was and with some restraining force was able to pop it out. The first pop was the scary one, after that I knew about what force was needed to pop them out. Make sure the tool is lined up with the clip. Out of the 11 only 1 clip broke. Here's some pics of what the back of the hood scoop looks like and the upholstery tools used.

How did you end up removing the hood scoop vent? I removed the 4 nuts on the underside and was able to pop up some of the plastic clips but wasn't able to get to three of them that were towards the center as there was no access to them from the underside.