Chevrolet Sonic Repair Manual: Battery Disconnect Warning

Warning:

Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

For Vehicles equipped with OnStar® (UE1) with Back Up Battery:

The Back Up Battery is a redundant power supply to allow limited OnStar® functionality in the event of a main vehicle battery power disruption to the VCIM (OnStar®module). Do not disconnect the main vehicle battery or remove the OnStar® fuse with the ignition key in any position other than OFF. Retained accessory power should be allowed to time out or be disabled (simply opening the driver door should disable retained accessory power) before disconnecting power. Disconnecting power to the OnStar® module in any way while the ignition is On or with retained accessory power activated may cause activation of the OnStar® Back-Up Battery system and will discharge and permanently damage the back-up battery. Once the Back-Up Battery is activated it will stay on until it has completely discharged. The back-up battery is not rechargeable and once activated the back-up battery must be replaced.

Battery Description and Operation

Warning: Batteries produce explosive gases, contain corrosive acid, and supply levels of electrical current high enough to cause burns. Therefore, to reduce the risk of personal injury when w ...

Battery Inspection/Test

Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic a ...

Other materials:

Rear Axle Replacement
Removal Procedure Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle. Remove the tires and wheel assembly. Refer to Tire and Wheel Removal and Installation. Remove the park brake cables from the rear axle. Refer to Parking Brake Cable Replacement. ...

Tires and Wheels Description and Operation
There are two types of tire and wheel balancing: static and dynamic. Static balance is the equal distribution of weight around the wheel. Assemblies that are statically unbalanced cause a bouncing action called wheel tramp. This condition may eventually cause uneven tire wear. ...

Engine Oil Cooler Outlet Hose Replacement (LUV)
Engine Oil Cooler Outlet Hose Replacement Callout Component Name Preliminary Procedure Drain the cooling system. Refer to Cooling System Draining and Filling. Disconnect the radiator outlet hose. Refer to Radiator Outlet H ...