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 WarningRear Suspension Description and Operation
This vehicle has a semi-independent twist-beam rear suspension system
consisting of the following components:
An axle with integral trailing arms
AV shaped twisting cross beam
Two coil springs
Two shock absorbers
Axle Assembly
The axle assembly (1) attaches to the underbody throu ...
Engine Power Messages
ENGINE POWER IS REDUCED
This message displays when the vehicle's engine power is reduced.
Reduced engine power can affect the vehicle's ability to accelerate.
If this message is on, but there is no reduction in performance, proceed to your
destination. The performance may be reduced the ...
Entry Lighting
The headlamps, parking lamps, taillamps, back-up lamps, and most of the interior
lamps turn on briefly when is pressed
on the Remote Keyless Entry (RKE) transmitter.
After about 30 seconds the exterior lamps turn off, and then the dome and remaining
interior lights will dim to off. Entry lig ...