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:

Heater Inlet Hose Replacement (LDE, LUW)
Special Tools BO-38185 Hose Clamp Pliers For equivalent regional tools, refer to Special Tools. Removal Procedure Drain the cooling system. Refer to Cooling System Draining and Filling. Disengage the heater inlet hose quick connect clip (1) at the heater ...

Inspection/Maintenance System Check
Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Diagnostic System Check - Vehicle for an overview of the diagnostic approach. Diagnostic Procedure Instructions provides an overview of each diagn ...

System temporarily unavailable
When any of the following messages appear on the vehicle information display, a chime will sound and the I-BSI system will be turned off automatically. "Unavailable Slippery Road": When the VDC system (except traction control system function) or ABS operates. "Currently Una ...