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:

Buying New Tires
GM has developed and matched specific tires for the vehicle. The original equipment tires installed were designed to meet General Motors Tire Performance Criteria Specification (TPC Spec) system rating. When replacement tires are needed, GM strongly recommends buying tires with the same TPC Sp ...

Battery Charging
Special Tools EL 50313 Battery Tester For equivalent regional tools, refer to Special Tools. Diagnostic Aids For best results, use an automatic taper-rate battery charger with a voltage capability of 16 V. The charging area should be well ventilated. Do not charge a bat ...

Engine Coolant Thermostat Housing Replacement (LUW)
Removal Procedure Remove the battery tray. Refer to Battery Tray Replacement. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle. Drain the cooling system. Refer to Cooling System Draining and Filling. Disconnect the engine harness conn ...