The doors will lock automatically when all doors are closed, the ignition is on, and the vehicle is shifted out of P (Park).
If a vehicle door is unlocked and then opened and closed, the doors will lock either when your foot is removed from the brake or the vehicle speed becomes faster than 13 km/h (8 mph).
To unlock the doors:
Automatic door locking cannot be disabled. Automatic door unlocking can be programmed. See Vehicle Personalization.
Engine Support Fixture Engine Block Engine Mounts
Special ToolsJ 28467-B Universal Engine Support FixtureJ 28467-7A Bolt HookJ-28467-13 Engine Support Fixture AdaptersJ 28467-34 Lift Hook Wing Nut and WasherJ 36462-A Engine Support Adapter Leg SetJ 42451-1 Engine Support AdapterGM P/N 11519137 4 Studs or equivalentInstallation ProcedureRemove the i ...