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Home >> Chevrolet >> 2021 >> Trailblazer L >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Displays And Gauges >> Diagnostic Information and Procedures >> Engine Oil Level Sensor Diagnosis >> Circuit/System Description

Circuit/System Description

For an overview of the component/system, refer to Instrument Cluster Description and Operation 

Circuit Description
Signal The control module input circuit has an internal resistance connected to 12 V.
Ground Chassis Ground
Component Description
K20 Engine Control Module The control module contains a microprocessor used to process input data to control outputs.
B35 Engine Oil Level Switch A magnet on a float keeps a reed contact closed as long as the engine oil level is above a calibrated threshold.