To open the hood, do the following.
1. Pull the interior hood
release lever with
this symbol on it.
It is located under
the instrument panel
on the driver's side
of the vehicle.
2. Then go to the front of the vehicle and push the secondary hood release lever to the left. It is located under the front center of the hood toward the driver's side of the vehicle.
3. After you have partially lifted the hood, a gas strut will automatically take over to lift and hold the hood in the fully open position.
Before closing the hood, be sure all the filler caps are on properly. Lower the hood until the lifting force of the strut is reduced, then release the hood to latch fully. Check to make sure the hood is closed and repeat the process if necessary.
Chevrolet Cobalt Service & Repair Manual. Exhaust Manifold, Replace
Removal
1.
Remove exhaust manifold heat shield.
2.
Remove oxygen sensor.
3.
Raise and support vehicle.
4.
Remove manifold to exhaust flex decoupler
mounting bolts.
...