So apparently, if your GX has the VSC and you do a wheel alignment you are supposed to do a ZPC.
see https://www.autoserviceprofessional....nt-calibration

My interest in ZPC was more about a inclinometer sensor (which I don't think GX has, can't find any reference to one) and fuel gauge in dash. Some 4runner years had this sensor linked (ECU) to the fuel sender unit so that on angle the gauge in dash would always read accurate.

I notice my gauge in dash always gets to F while I am still pumping a few gallons and then pump handle auto-off clicks off, and the the gauge needle is pegged just above F for a bit even though I know it's used some gas.

Anyone else notice this with their gauge?