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:

California Fuel Requirements
If the vehicle is certified to meet California Emissions Standards, it is designed to operate on fuels that meet California specifications. See the underhood emission control label. If this fuel is not available in states adopting California Emissions Standards, the vehicle will operate satisf ...

Rear Window Defogger Description and Operation
Rear Window Defogger System Components The rear window defogger system consist of the following components: The HVAC control module The body control module (BCM) The rear defogger relay The rear window grid Driver outside rearview mirror Passenger outside rearview mirro ...

Relay Replacement (Attached to Wire Harness)
Removal Procedure Locate the relay. Refer to the Master Electrical Component List to locate the relay in the vehicle. Remove any fasteners which hold the relay in place. Remove any connector position assurance (CPA) devices or secondary locks. Note: Use care w ...