Chevrolet Sonic Repair Manual: Intake and Forced Induction

Spark Plug Replacement

Spark Plug Replacement Callout Component Name Preliminary Procedure Open the hood. Remove the engine sight shield. Remove t ...

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Hood Ajar Indicator Description and Operation
Hood Ajar Switch The body control module (BCM) applies B+ to the hood ajar signal circuit and monitors the voltage to determine the position of the hood. When the hood is closed, the switch is open and voltage remains high. When the hood is open, the switch is closed and the voltag ...

Engine Coolant Temperature Sensor Replacement (Radiator)
Engine Coolant Temperature Sensor Replacement - Radiator Callout Component Name Preliminary Procedures Drain the cooling system. Refer to  Cooling System Draining and Filling. 1 Retaining C ...

Knock Sensor System Description
Circuit/System Description The knock sensor system enables the engine control module (ECM) to control the ignition timing for the best possible performance while protecting the engine from potentially damaging levels of detonation. The ECM uses the knock sensor system to test for ...