Error on LCD: Service TPM

[Hummer Guy]

Originally Posted by f5fstop

Sometimes, and it is not that often, the system will react to multiple low sensor readings as being a problem. If all pressures are ok, do what Hummer Guy suggested. If that does not work, it is time to visit the dealer.

Interesting -- I figured it wasn't low tires because of the "Low Tire" reading -- I didn't know multiple low sensors could cause the "Service TPM"...good to know.