On vehicles with power door locks, the doors automatically lock when the shift lever is moved out of (P) Park for a vehicle with an automatic transmission.
For a vehicle with a manual transmission, the speed must be greater than 5 mph (8 km/h).
The automatic door locking feature cannot be disabled.
Delayed Locking
Programmable Automatic Door UnlockChevrolet Cobalt Service & Repair Manual. Description
AC-Delco Tandem Diaphragm Type
This unit utilizes a vacuum power
chamber, consisting of a front and rear shell, housing divider, front and
rear diaphragm, plate assemblies, hydraulic pushrod and a diaphragm return
spring, Fig. 1.
In normal operating mode, with
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