Chevrolet Cobalt Service & Repair Manual: Passkey Module

On models equipped with the Passkey Theft Deterrent System, a new password must be learned by the PCM when the BCM/PCM has been replaced. When the PCM is replaced, the EEPROM calibration is flashed into the new PCM. Refer to latest GM Techline or equivalent information for PCM programming. After EEPROM calibration is complete, perform the following procedure:
1. Attempt to start vehicle, vehicle will stall.
2. Leave ignition On until Theft System warning lamp turns Off.
3. Turn ignition Off.
4. Attempt to start vehicle. Password is now learned and vehicle will now start.
    Wheel, Replace
    Removal Caution: Never use heat to loosen a tight wheel. This can shorten the life of wheel and damage wheel bearings. Wear approved safety glasses when performing the ...

    2007-10 Cobalt & G5
    w/2.0L & 2.4L Engines Warning: Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel i ...

    See also:

    Chevrolet Cobalt Owners Manual. Engine Coolant Heater
    The engine coolant heater can provide easier starting and better fuel economy during engine warm-up in cold weather condition at or below 0°F (-18°C). Vehicles with am engine coolant heater should be plugged in at least four hours before starting. An internal thermostat in the plug-end of the ...

    Chevrolet Cobalt Owners Manual

    Chevrolet Cobalt Service Manual

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