Am I nuts for considering sticking with P-metric tire?

[Kmrtnsn]

Yes, I thought it was S10's as well?

Probably. If there’s one thing GM excels at is sharing parts across model lines. I had a 4X4 S-10 Blazer decades ago. I can’t remember what tire size it came with but 31-10:50R15s are what I put on it and they had a stock-like fitment without “suspension wear issues”.

 

[Buddha.]

I had a zr2 p/u with factory 31x10.5, a 4 door blazer I put 30x9.5 on, and a 2wd p/u with tiny tires. The last one ate the most steering components but I put the most mileage on it.