I know this is the internet but, I still like to use facts.
Fact: GMs own engineers (program manager) tell you if you are going off roading to take the air damn off. They dont say 'go off roading but only for 30 minutes due to cooling"
2:15 he tells you to remove it.
Fact: GMs Owners manual tells you to remove it for offroading
Fact: I not only took mine off, but replaced the entire bumper assembly which has zero aerodynamic anilities and added a lot more weight and my temps are on the low end of the temp range.
Fact: since I installed my bumpers, I have suffered 1/10 of a MPG change so.....you got me on that one.
Fact: With no air dam, I dont even need to jack my truck up or put it on ramps to change the oil. (Im only 195 pounds so, cant verify whether some of our more robust members can fit under there as easily)
But at the end of the day, I did what others have done.....I did it to make me happy. Maybe the snow plow suits you....it simply didnt suit me.
Besides, I was afraid zombies would get stuck under there if I ran them over.
And last fact: Yea, Im gonna show it off....what else is new.