On the passenger side, almost all of the "holes" were blocked and needed to be poked thru. On the drivers side the half closest to the middle also were almost entirely blocked. After pushing these thru with the drill, the temperature really went down and is just slightly warmer than the outside temperature. When the temp is over 90, it still blows hot air unless you turn the AC on. This really works great! No need to have warm air blow thru when it is <70 degress out.

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'01 Silver Ice SE 4x4 Automatic V6