The 2011 GC mainstreet van needed new wipers. Bought a pair from anco. They have adapters for different size arm hooks. So the driver side needed the larger adapter. To my surprise, the passenger side hook is the smaller size!!! The left side is a 26" blade, right size is 20".

Is that normal to have two different hooks, or did I get a mixed batch at the assembly plant? I've never seen them change the hooks on the same car.

 

i beleieve they are 2 different sizes and if im correct the passanger did have a different connection which comes in the new wiper anyways. mine a 2010 model too.