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:

If No Steam Is Coming from the Engine Compartment
If an engine overheat warning is displayed but no steam can be seen or heard, the problem may not be too serious. Sometimes the engine can get a little too hot when the vehicle: Climbs a long hill on a hot day. Stops after high-speed driving. Idles for long periods in traffic. If the ...

Steering Wheel and Column Description and Operation
The steering wheel and column have the following 4 primary functions: Vehicle steering Vehicle security Driver convenience Driver safety Vehicle Steering The steering wheel is the first link between the driver and the vehicle. The steering wheel is fastened to a steer ...

Cylinder Head Removal
Loosen the 12 cylinder head bolts in the sequence as shown. Use the following procedure: Loosen the cylinder head bolts 90 degrees. Loosen the cylinder head bolts 180 degrees. Note: Do not damage the guide sleeves (4) and (5). R ...