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.
Gasoline Octane
California FuelChevrolet Cobalt Service & Repair Manual. Body Control System Diagnosis & Testing
The body control module (BCM)
has a bussed electrical center integrated into the housing. Body control
relays and fuses are installed directly on the BCM, which simplifies wiring
and junction blocks on the vehicle. The body control system consists of
the BCM and its associated ...