Chevrolet Sonic Repair Manual: Valvetrain

Starter Replacement (LUW)

Removal Procedure Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection. Raise and support the vehicle. Refer to Lifting and Jacking ...

Valve Guide Reaming, and Valve and Seat Grinding

Valve Cleaning Procedure Use soft bristle wire brush to clean any carbon build-up from the valve head. DO NOT use a wire brush on any part of the valve stem. The valve stem is chr ...

Other materials:

Battery Charging
Special Tools EL 50313 Battery Tester For equivalent regional tools, refer to Special Tools. Diagnostic Aids For best results, use an automatic taper-rate battery charger with a voltage capability of 16 V. The charging area should be well ventilated. Do not charge a bat ...

Fuel System Cleaning
Note: If the fuel filter is plugged, the fuel tank should be inspected internally and cleaned if necessary. Drain the fuel tank. Refer to  Fuel Tank Draining. Remove the fuel pump module assembly. Refer to  Fuel Tank Fuel Pump Module Replacement. Inspect the fue ...

Transmission Adaptive Functions
The 6T30/40/45/50 transmission utilizes a line pressure control system during upshifts to compensate for the normal wear of transmission components. As the apply components within the transmission wear or change over time, shift time (the time required to apply a clutch) increase or decreases. ...