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. High Mount Stoplamp Bulb, Replace
1.
Remove rear compartment lid inner panel
trim.
2.
Disengage tabs on high mount stoplamp
bulb connector (1) and remove connector from high mount stoplamp,
Fig. 1.
3.
Remove high mount stoplamp bul ...