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:

Lockout Protection
If the driver side power door lock switch is pressed when the driver door is open and the key is in the ignition, all of the doors will lock and then the driver door will unlock. If Unlocked Door Anti Lockout is turned on and: the vehicle is off, the driver door is open, and door locking is r ...

Engine Coolant Thermostat Housing Removal
Caution: Refer to Engine Coolant Thermostat Housing Caution. Remove the engine coolant thermostat housing retainer nut (4). Remove the engine coolant thermostat housing retainer (1). Remove the 4 engine coolant thermostat housing bolts (3). Remo ...

Exhaust Manifold Heat Shield Replacement (LUV)
Exhaust Manifold Heat Shield Replacement Callout Component Name Warning: Refer to Exhaust Service Warning. 1 Exhaust Manifold Heat Shield Fasteners (Qty: 3) Caution: Refer to Fas ...