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:

Torque Lock (Automatic Transmission)
If you are parking on a hill and you do not shift the transmission into P (Park) properly, the weight of the vehicle may put too much force on the parking pawl in the transmission. You may find it difficult to pull the shift lever out of P (Park). This is called “torque lock.” To prevent t ...

Body Panel Paint Protector Replacement (VGC)
The paint protective film and vehicle surface temperature should be 13?€“32?°C (55?€“90?°F) for best results. Automatic car washes should be avoided for at least 24?€‰hours after the paint protective film application. Wipe the vehicle surface with isopropyl alcohol or fl ...

Fuel Tank Pressure Sensor Replacement
Fuel Tank Pressure Sensor Replacement Callout Component Name Preliminary Procedure Remove the fuel tank. Refer to Fuel Tank Replacement. 1 Fuel Tank Pressure Sensor Procedure Disco ...