TPMS sensors, RPO codes, QR readers?
So, I've got a 2020 Bolt Premier. I've been switching tires in the factory rims twice a year since I live in Lake Ontario's path of destruction. I recently bought a set of dedicated steelies that will have dedicated Blizzaks permanently mounted on them.
The rims are bare (save for some surface rust). I would like to get TPMS sensors for them, because that's a handy feature that I've grown accustomed to. But I feel like an idiot trying to get this sorted out.
I hop on RockAuto, and there are two different sensors shown in the catalog. The sensors have a unique frequency (315 vs 433 MHz) and what appears to be an associated RPO code (XL7 and XL8, respectively). So I go to check the RPO codes, learn that GM started using a QR code on the door jamb, and... I don't see either XL7 or XL8 listed.
I scanned it with my phone and the string of text ended in a few commas. I thought maybe the list was getting truncated, so I scanned it with another phone, then a tablet, then took a picture and uploaded it to an online QR code reader with my laptop. They all end with the following:
>WML Z1N 2LZ 2LZ 4F1 5A7 6X1 7X1 8X2 9L3 9X2,322E,,,,
The codes look to be alphabetical, and I don't see XL7 or XL8 earlier in the list. Am I looking for the wrong information? I feel like there's gotta be a simple solution that I'm overlooking.