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New for 2011
The Sierra Hybrid gets GM's OnStar 9.0 telematics system that GM says provides better voice recognition. GM also said they have worked to cut down on the amount of wind noise occupants hear. ...

Fuel System Messages
FUEL LEVEL LOW This message displays and a chime sounds if the fuel level is low. Refuel as soon as possible. See Fuel Gauge on page 5‑13 and Fuel on page 9‑40 for more information. TIGH ...

Reducing Speed While Using Cruise Control
If the cruise control system is already activated, . Press and hold the SET– button on the steering wheel until the desired lower speed is reached, then release it. • To slow down in small amount ...