Use only lukewarm or cold water, a soft cloth and a car washing soap to clean exterior lamps and lenses.
Follow instructions under Washing Your Vehicle.
Chevrolet Cobalt Service & Repair Manual. Rear Side Marker Lamp Bulb, Replace
Coupe
1.
Remove rear side marker lamp.
2.
Rotate rear side marker lamp bulb socket
(1) counterclockwise and remove from lamp housing, Fig.
1.
3.
Remove rear side marker lamp bulb (2),
Fig. 1.
...