Safety recall

Well bless your heart

That's a bunch of trucks with possible bad brakes.

Another link

That's a lot of trucks, and it sounds like 9 instances of failure reported to date.

No accidents reported, but one injury? How did that happen, someone break an ankle from stomping on the brake pedal too hard? I'd think it'd take a while to replace 270,000 master cylinders, and might take a while to get the parts inventory as well.

I read the brake cylinder recall somewhere else. It sounds like they're supposed to do an inspection first and then determine if brake fluid is making it into the vacuum/booster reservoir. The vast majority probably won't have the master cylinder assembly replaced.