The control for this
feature is located on the
instrument panel to the
left of the steering wheel.
Turn the knob clockwise to brighten the lights or counterclockwise to dim the instrument panel lights, when the parking lamps or headlamps are on.
Chevrolet Cobalt Service & Repair Manual. Engine Valve Seat Grind
It is usually recommended to send
head to machine shop for valve seat grinding.
A suitable valve grinding tool
kit is required to grind valve seats.
Valve guides must be in good condition
before grinding because a pilot is used in guide to center stones. ...