At a minimum, gasoline should meet ASTM specification D 4814 in the United States or CAN/CGSB-3.5 or 3.511 in Canada. Some gasolines contain an octane-enhancing additive called methylcyclopentadienyl manganese tricarbonyl (MMT).
We recommend against the use of gasolines containing MMT. See Additives for additional information.
Chevrolet Cobalt Service & Repair Manual. Component Replacement
Tire Pressure Indicator Sensor
Each tire pressure sensor has
an internal power supply that has a service life of 10 years.
Removal
1.
Loosen lug nuts.
2.
Raise and support vehicle with jack
stands, then remove wheel an ...