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:

Washing the Vehicle
To preserve the vehicle's finish, wash it often and out of direct sunlight. Caution Do not use petroleum-based, acidic, or abrasive cleaning agents as they can damage the vehicle's paint, metal, or plastic parts. If damage occurs, it would not be covered by the vehicle warranty. Approv ...

Fuel Tank Filler Door Latch Housing Replacement
Fuel Tank Filler Door Latch Housing Replacement Callout Component Name Preliminary Procedures Remove the rear wheelhouse panel liner. Refer to Rear Wheelhouse Liner Replacement. Remove the fuel tank filler door. Refer to ...

Drive Range, First Gear (Gen 1)
As the vehicle speed increases, the transmission control module (TCM) receives input signals from the automatic transmission input and output speed sensors, throttle position sensor and other vehicle sensors to determine the precise moment to deenergize or ?urn OFF?the shift solenoid, and to c ...