The tires and wheels on your vehicle were aligned and balanced carefully at the factory to give you the longest tire life and best overall performance. Adjustments to wheel alignment and tire balancing will not be necessary on a regular basis. However, if you notice unusual tire wear or your vehicle pulling to one side or the other, the alignment might need to be checked.
If you notice your vehicle vibrating when driving on a smooth road, the tires and wheels might need to be rebalanced. See your dealer/retailer for proper diagnosis.
Uniform Tire Quality Grading
Wheel ReplacementChevrolet Cobalt Service & Repair Manual. Engine Oil Pan Gasket R&R
1.
Install the engine support fixture.
2.
Remove the engine mount.
3.
Raise the engine enough to allow clearance
for the oil pan removal.
4.
Raise and support the vehicle.
...