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 WarningUS English/Metric Conversion
Decimal and Metric Equivalents
Arrows and Symbols
This service manual uses various symbols in order to describe different
service operations.
Front of Vehicle
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Ambient Air Mixed with Another Gas or Indicate Temperature Chan ...
How To Indentify Plastic Parts
Plastic parts can be identified by the SAE code, which is usually found on
the rear of the part, and/or by the characteristics of the plastic.
Knowing the type of plastic aids in selecting the proper repair materials and in
selecting the proper repair procedure.
Look for the SAE code s ...
Service
This vehicle may have the new environmentally friendly refrigerant, R1234yf.
This refrigerant has a significantly reduced global warming impact on the environment,
compared to the traditional automotive refrigerant, R-134a. All vehicles have a
label underhood that identifies the refrigerant us ...