You could in fact, take out the entire side window. It's not that hard really with some windex. I actually locked my keys into the truck and after staring at it a long time, actually pulled the side glass out of the topper to get into the truck.
Needless to say, my daughter was very impressed! She was the one that locked the keys in the truck when we were shopping at a camera store....
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- Jeff
89' K5 Blazer, 2.5" lift, 35" tires
04' GMC Yukon XL, 3/4 ton, 8.1L