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 WarningFloor Mats
WARNING
If a floor mat is the wrong size or is not properly installed, it can interfere
with the pedals.
Interference with the pedals can cause unintended acceleration and/or increased
stopping distance which can cause a crash and injury. Make sure the floor mat does
not interfere with the p ...
Instrument Panel Cluster Lower Trim Plate Replacement
Preliminary Procedure
Remove instrument panel cluster trim plate. Refer to Instrument Panel Cluster
Trim Plate Replacement.
Instrument Panel Cluster Lower Trim Plate Screw (Qty: 4)
Caution: Refer to Fastener Caution in the Preface section.
Tighten
2.5 N·m (23 lb in)
Instrument Pa ...
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 ...