FICM rollback MPG's

[atk]

usually located on top(bolted to) of the thermostat housing, hope this helps....i to will looking at my sensor, haven`t seen the improvements i was hoping for in the mpg after doing ficm reprogram and ecm/tcm rollback and new custom tunes. the tube is clear, may just replace sensor and try that(not expensive part)....other then that, truck works awsome....thanks Bill