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:

Ignition Coil Installation
Special Tools EN-6009 Remover and Installer Ignition Module For equivalent regional tools, refer to Special Tools. Install the ignition coil (1) and remove EN-6009 remover and installer  (2). Caution: Refer to Fastener Caution. Install the 2  ...

Drive Range, Second Gear (Gen 1)
As vehicle speed increases and operating conditions become appropriate, the transmission control module (TCM) processes input signals from the automatic transmission input and output speed sensors, the throttle position sensor and other vehicle sensors to determine the precise moment to comman ...

Transmission Rear Mount Replacement
Removal Procedure Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle. Remove and DISCARD the rear transmission mount bracket to rear mount through bolt (1). Remove rear transmission mount to frame bolt (3). Push and hold ...