The engine compartment fuse block is located on the driver side of the vehicle. Lift off the cover to check the fuses. See Engine Compartment Overview for more information on location.
Notice: Spilling liquid on any electrical components on the vehicle may damage it. Always keep the covers on any electrical component.

Floor Console Fuse Block
Capacities and SpecificationsChevrolet Cobalt Owners Manual. Gasoline Octane
If the vehicle has the 2.2L L4 engine (VIN Code 5),
use regular unleaded gasoline with a posted octane
rating of 87 or higher. If the octane rating is less than
87, an audible knocking noise, commonly referred to
as spark knock, might be heard when driving. If this
occurs, use a gasoline rated ...