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2017 CHEVROLET SILVERADO 1500
5.3L V8 EcoTec3 L83•RWD•AUTOMATIC•gas
6 active safety recalls on this vehicle — view recalls
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Repairs421Labor499Torque4352Fluid8DTC1251Battery1Maintenance0Recalls6
P1864moderate severityPowertrain

Torque Converter Clutch System Electrical

on 2017 Chevrolet Silverado 1500 5.3L V8 EcoTec3 L83 · RWD

What this code means

An electrical fault was detected in the torque converter clutch control system. This resembles generic code P0743 and affects lockup clutch operation and efficiency.

Symptoms

  • Engine RPM flare during cruise
  • Poor fuel mileage
  • Transmission running hot

Common causes

  • Faulty TCC solenoid
  • Open or shorted circuit wiring
  • Corroded transmission connector
  • Failed transmission control module

Diagnostic steps

  1. Retrieve trouble codes and freeze frame
  2. Inspect TCC circuit wiring and connectors
  3. Measure solenoid resistance for spec
  4. Verify TCM operation and driver output
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🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
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