[revjpeterson]

I ordered a bag of these, and they have worked as replacements as the original nuts progressively strip out after 8.5 years and almost 200k of fuel filter and emissions sensor replacements.

Amazon.com: Autobahn88 Rear Bumper-Center Bracket Nut, fits for GM (OEM: 11547637) (Pack of 20) : Everything Else

Amazon.com: Autobahn88 Rear Bumper-Center Bracket Nut, fits for GM (OEM: 11547637) (Pack of 20) : Everything Else

smile.amazon.com

 

[revjpeterson]

You live in the rust belt?

Mine haven't stripped but the screw that's on the one on the fuel tank strapped broke off.

I'm presently in MI, which is a salt-heavy state, but the car spent the first half of its life in Iowa, where it's usually too cold for salt, so the body hasn't taken quite the beating as if it was always in the rust belt. No studs have broken free yet, but I've had 3 of the nylon nuts strip out on me. I guess if one does break loose, I can be glad that there are 10 of them and it probably won't make too much of a difference without it.