Didn’t your OT come with a compressor built into the left side cargo area?My OT Toyo tires were at 41, I haven’t checked the spare. I do carry an air pump in the GX.
I lowered the 4 down to 35-ish, played around a bit. The ride is more comfortable on city streets that way. I still have the vibration thing going on. Leaving on a trip and have them at 38 now. All PSI from a couple very reliable hand gauges, checked by a cheaper, smaller 3rd gauge. The TPMS reads about 4 low.. I need to read manual and see if I can re-set, recalibrate it.