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:

Trip Computer
The trip computer is located in the Driver Information Center (DIC). It provides the driver with driving information such as average speed, fuel range, average fuel economy, and a timer. 1. SET/CLR: Press to set or clear the menu item displayed. This is not used to reset the trip odometer. T ...

Crankshaft Balancer Removal
Special Tools EN-652 Flywheel Holder For equivalent regional tools, refer to Special Tools. Install the EN-652 holder (1). Lock the flywheel (2) or the automatic transmission flex plate via the starter ring gear. Remove and DISCARD the crankshaft balancer bo ...

Drive Range, Third 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 ...