29110 ? Customer Satisfaction Program. Vehicles equipped with the full size spare tire and road wheel option may have been built without a tire pressure monitoring (TPM) sensor installed in the spare tire. If the spare tire was to be used and the TPM system is programmed to coordinate with the wheels in use, a tire pressure monitor system error would be displayed due to the lack of a sensor in the spare tire. Dealers are to install a TPM sensor in the spare tire.