THEFTLOCK® is designed to discourage theft of the vehicle's radio by learning a portion of the Vehicle Identification Number (VIN). The radio does not operate if it is stolen or moved to a different vehicle.
Chevrolet Cobalt Service & Repair Manual. Valve Spring Replace
This procedure is designed to
replace valve spring while head is attached to engine.
1.
Install a suitable flywheel holding
tool in order to prevent crankshaft rotation.
2.
Remove applicable spark plug from cylinder
...