Chevrolet Sonic Repair Manual: Immobilizer

Ignition Lock Cylinder Replacement

Removal Procedure Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection. Remove the upper trim cover and the lower trim cover f ...

Immobilizer Description and Operation

The immobilizer system functions are provided by the body control module (BCM) and the engine control module (ECM), as well as any modules which store and report the environment identifier. When ...

Other materials:

When the System Does Not Seem To Work Properly
If the LDW symbol does not appear: The lane markings on the road may not be seen. The camera sensor may be blocked by dirt, snow or ice. The windshield may be damaged. The weather may be limiting visibility. This is normal operation; the vehicle does not need service. Clean the windshie ...

Transmission Indicators and Messages
The following transmission-related indicators and messages may be displayed on the Instrument Panel Cluster (IPC). For a complete listing and description of all vehicle indicators and messages, refer to Indicator/Warning Message Description and Operation. "TRANSMISSION HOT IDLE ...

Airbag Instrument Panel Module Replacement
Airbag Instrument Panel Module Replacement Callout Component Name Warning: Refer to SIR Inflator Module Handling and Storage Warning. Warning: Refer to SIR Warning. Preliminary Procedure Disable t ...