GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Cobalt 🢒 Accessories 🢒 Keyless Entry 🢒 Keyless Entry System Description and Operation

The keyless entry system is a supplementary vehicle entry device. Radio frequency interference or discharged batteries may disable the system.

Keyless entry allows you to operate the following features:

    • The door locks
    • The rear compartment lid release--Press and release rear release button to activate.
    • The illuminated entry lamps
    • The panic alarm
    • Vehicle locate

The keyless entry system has the following main components:

    • The transmitters
    • The body control module (BCM)
    • The remote control door lock receiver (RCDLR)--When you press a button on the transmitter, the transmitter sends a signal to the RCDLR. The RCDLR receives the signal and sends a X Link serial data message requesting the appropriate function from the BCM.

Unlock Driver Door Only

Momentarily press the UNLOCK button in order to perform the following functions:

    • Unlock the driver door only.
    • Illuminate the interior lamps for approximately 20 seconds or until the ignition is turned ON.
    • Flash the park lamps if the ignition is turned OFF and the doors are closed.

Unlock All Doors - Second Operation

Momentarily press the UNLOCK button a second time, within 5 seconds of the first press, in order to perform the following functions:

    • Unlock all of the doors.
    • Illuminate the interior lamps for approximately 20 seconds or until the ignition is turned ON.

Lock All Doors

Press the LOCK button in order to perform the following functions:

    • Lock all of the doors.
    • Immediately turn OFF the interior lamps.
    • Flash the park lamps if the ignition is OFF and the doors are closed.
    • Chirp the horn if the ignition is OFF and the doors are closed.

Vehicle Locator/Panic Alarm

Press this button to locate your vehicle. The horn will sound 3 times and the headlamps and parking lamps will flash 3 times. Press and hold the button for 3 seconds to sound the panic alarm. The horn will sound and the headlamps and parking lamps will flash for 30 seconds. Press the button again to cancel the panic alarm. The vehicle may have programmable remote lock/unlock confirmation. This feature provides feedback that a command has been received by the vehicle. The headlamps will flash and the horn may sound briefly.