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. Exhaust Manifold Gasket R&R
1.
Remove the secondary air injection
bolts (2) and nuts (1), Fig. 1.
2.
Remove the secondary air injection
studs (3 and 4), Fig. 2.
3.
Remove the secondary air injection
valve assembly (1), Fig. ...