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:

Event Data Recorders
This vehicle is equipped with an event data recorder (EDR). The main purpose of an EDR is to record, in certain crash or near crash-like situations, such as an air bag deployment or hitting a road obstacle, data that will assist in understanding how a vehicle’s systems performed. The EDR is ...

Drum Brake Adjusting Hardware Inspection
Warning: Refer to Brake Dust Warning. Visually inspect the adjuster actuator spring (1) for the following conditions: Excessive stretching Excessive bending Excessive corrosion Broken Missing If any of the conditions listed were found, the adjuster actu ...

Engine Oil Cooler Replacement
Removal Procedure Disconnect battery negative cable. Refer to Battery Negative Cable Disconnection and Connection. Drain engine coolant. Refer to Cooling System Draining and Filling Remove the turbocharger oil feed pipe. Refer to Turbocharger Oil Feed Pipe Replacement ...