See also:

Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn the ignition to LOCK/OFF in each shift lever position. - The ignition should turn to LOCK/OFF only when the shift lever is in P (Pa ...

Delayed Locking
When this feature is enabled and the doors are locked with the power lock switch on the instrument panel or front door panels, three chimes sound to signal that the delayed locking feature is in use ...

Safety
Six airbags, including front-seat side-impact and side curtain-type devices, are standard. All-disc antilock brakes include brake assist. GM's StabiliTrak electronic stability system is standard. ...