Probably less windshield being wiped. You and I might not notice, but there is a Federal Reg (FMVSS/CMVSS) that requires an exact number of square inches to be wiped on both sides and combined. I just wonder why the designer decided on 15.7/16.7 inches, instead of 16 and 17 inches.
Easier to find refills, and I would think less expensive for GM to purchase since these odd sizes are custom made.
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Black Sheep Hummer Squadron
(ME TOO)
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