What are these RPO codes?

[broc944]

I have looked at every RPO chart I can find, and none of them have these three codes, XYT, YYT,ZYT. Anyone have any info on these three?

 

[rick88blaze]

I couldn't find any ending in T but the ones below are the closest thing there is on my RPO list:

XYN : LT235/85R16E, R/PE, ST TL ALS BL FRONT

YYN : LT235/85R16E, R/PE ST TL ALS BL REAR

ZYN : LT235/85R16E, R/PE ST TL ALS BL SPARE

All 3 of these refer to front, rear, and spare tire size. What kind of truck are the codes from?

Rick

 

[broc944]

I saw these also, I have a 91 Burb, PO told me it was a special order State vehicle, a couple of the RPO codes sort of confirm his statement. So I am thinking it might of came with a set ouf non-standard size tires.

 

[rick88blaze]

That could be. Sorry I can't help you out more.

Rick

 

[Slapperbar]

That's the standard size for the V2500 burbs. I have one. Also here...http://www.c2e.info/rpocodes/MODERNGMRPO.html all you need.

 

[85k30]

the codes stand for LT235/85r16-e on-off road steel belted radial ply blackwall. xyt- front k2-3 series only yyt-rear c-k2 or k3 series only. zyt- spare c-k2 or k3 series only.