OnStar Overview
EmergencyAutomatic Transmission Shift Lock Control Function Check
Warning
When you are doing this inspection, the vehicle could move suddenly.
If the vehicle moves, you or others could be injured.
Before starting this check, be sure there is enough room around the vehicle.
It should be parked on a level surface.
Apply the parking brake. Be ready to app ...
Parking
If the vehicle has a manual transmission, before getting out of the vehicle,
move the shift lever into R (Reverse) if parking on a downhill slope. On a level
surface or an uphill slope, use 1 (First) gear.
Firmly apply the parking brake. Turn the wheels toward the curb for a downhill
slope, o ...
Lockout Protection
When locking is requested with the driver door open and the key in the ignition,
all the doors will lock and then the driver door will unlock. This can be manually
overridden by pressing and holding
on the power door lock switch.
If Unlocked Door Anti-Lockout is turned on, the vehicle is off ...