Conditions in Which Remote Start Will Not Work
The remote vehicle start feature will not operate if:
○ The key is in the ignition.
○ The hood or doors are not closed.
○ The hazard warning flashers are on.
○ There is an emission control system malfunction.
○ The engine coolant temperature is too high.
○ The oil pressure is low.
○ Two remote vehicle starts have already been used.
○ The vehicle is not in P (Park).
See also:
Entering the Feature Settings Menu
1. Turn the ignition on and place the vehicle in P (Park).
To avoid excessive drain on the battery, it is recommended that the headlamps are turned off.
2. Press the customization button to enter th ...
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The Sierra Hybrid gets GM's OnStar 9.0 telematics system that GM says
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Voice Recognition
The voice recognition system uses commands to control the system and dial phone
numbers.
Noise: The system may not recognize voice commands if there is too much background
noise.
When to Speak: ...