Rock Auto sells an arm for $25 but it is 22.75" and mine is less than 20". IDK who's right. Any reason why a person couldn't just swap sides?

 

I’m a little late but I went through the same thing. I didn’t want to bend the arm or buy new arms so I took a dremel and grinded down the tabs under where the arm pivots and it worked perfectly

 

get new wiper arms from Rock Auto

 

I had the same issue with my 2001 blazer when I got it earlier this year. I tried two different brands of wiper blades, and that didn’t fix the issue.

What I did was bend the wiper arm just enough till it started wiping properly.

It was a very easy fix.