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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Automatic Transmission - 8L90 (M5U MQD) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Tow/Haul Switch/Indicator Malfunction >> Circuit/System Description

Circuit/System Description

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For details refer to the owner's manual.

Circuit Description
Signal The control module input circuit has an internal resistance connected to 12 V.
Ground Chassis Ground
Component Description
K9 Body Control Module The control module contains a microprocessor used to process input data to control outputs.The control module receives information from a variety of sensors, switches and serial data information from other control modules. This information is used to control a combination of solenoid valves to obtain the correct line pressure, gear ratio and torque converter clutch operation.
S18 Exhaust Brake Switch The switch has a normally open contact.
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