The Pontiac G8 is a fun and enjoyable car, though a little rough around the edges for some details. The G8 model never had time to be polished because it and the whole Pontiac brand where cancelled as a result of the GM bankruptcy from the Financial crisis of 2007–2008. So, there are just somethings where the owner needs to consider their options when replacing worn-out parts. One consideration: the two windshield wiper blades.
The original sizes for the wiper blades didn't do a good job of clearing the window in front of the driver. The stock wiper blades don't swipe enough of the upper middle area of the windshield to help the driver clearly see through portions of the window. Another problem with the original blades is/was that some owners (including myself) reported chatter or incomplete clearing of the window during each swipe.
Funny enough, it's not easy to find the sizes of the original wiper blades. You can still buy them, supposedly, but the sizes aren't published in their descriptions. I think they were something like 24" length for the driver's side and 14" for the passenger side. Whatever the sizes, the original blades left rather large of areas of the window unswiped during rain, not just at the top, but also the bottom of the window between swiped areas.
I didn't wait long to replace the original blades. Either late 2009 or 2010, I found some good quality replacement blades of the sizes 26" and 15". (At the time, it wasn't easy to figure out replacements of alternate sizes.) Believe it or not, my replacement blades performed well for 10 years. Sometimes you get lucky. Unfortunately, when it came time to replace them this year, I lost track of what I purchased before.
That didn't end up mattering, though. In 2020, the secret has long since been out. It's actually more common to find 26"/15" sizes than what might've been stock sizes. On multiple sites, I found that the main size recommendations are 26"/15". So, it is really down to quality (since price stopped being a factor since I'm no longer looking at stock blades).
After seeing recommendations on multiple websites (including forums) and reading many reviews, I settled on Trico brand blades: Trico 25-260 Force Beam Wiper Blade 26" and Trico 25-150 Force Beam Wiper Blade 15".