For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningWheel Alignment Measurement
Steering and vibration complaints are not always the result of improper
alignment. One possible cause is wheel and tire imbalance.
Another possibility is tire lead due to worn or improperly manufactured tires.
Lead/pull is defined as follows: At a constant highway speed
on a typical straight ...
Customer Satisfaction Procedure
Your satisfaction and goodwill are important to your dealer and to Chevrolet.
Normally, any concerns with the sales transaction or the operation of the vehicle
will be resolved by your dealer's sales or service departments. Sometimes, however,
despite the best intentions of all concerned, ...
Fuel Additives
To provide cleaner air, all gasolines in the United States are now required to
contain additives that help prevent engine and fuel system deposits from forming,
allowing the emission control system to work properly. In most cases, nothing should
have to be added to the fuel.
However, some gas ...