The driver's seat height adjuster is located on the outboard side of the seat.
To raise the seat, move the lever upward repeatedly until the seat is at the desired height. To lower the seat, move the lever downward repeatedly until the seat is at the desired height.
Chevrolet Cobalt Service & Repair Manual. 2007-10 Cobalt & G5
w/2.0L & 2.4L Engines
Warning: Gasoline or gasoline
vapors are highly flammable. A fire could occur if an ignition source is
present. Never drain or store gasoline or diesel fuel in an open container,
due to possibility of fire or explosion. Have a dry chemical (Class B) fire ...