← View Generic B0373 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B0373: B0373: Illumination Control Module (ICM) Malfunction

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$100 - $300
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
❌ No
Pro recommended
Your Vehicle
2020 Chevrolet
SILVERADO 1500 PICKUP
⚠️

Important for 2020 Chevrolet SILVERADO 1500 PICKUP Owners

Before starting repairs, verify which engine your 2020 Chevrolet SILVERADO 1500 PICKUP has. Check your VIN or engine code to ensure you order the correct parts.

📖 What Does B0373 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The illumination control module (ICM) has detected a malfunction in the lighting system, which may be causing issues with the dashboard lights, brake lights, or turn signals.
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Symptoms

  • • Dim or inoperative dashboard lights
  • • brake lights
  • • or turn signals
  • • unusual lighting patterns
  • • or warning lights on the dashboard.
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Common Causes

  • • Faulty ICM
  • • wiring issues
  • • blown fuses
  • • or damaged lighting components.
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How to Fix B0373 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the ICM for any signs of physical damage or corrosion. 2. Inspect the wiring and connectors for any signs of damage or corrosion. 3. Check the fuses and replace any blown ones. 4. Test the lighting components to ensure they are functioning properly. 5. If the issue persists, replace the ICM.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Illumination Control Module (ICM) Shop ↗ Wiring harness Shop ↗ Fuses Shop ↗

Essential Tool

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OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B0373

B0371 Sequential Code

B0371: Power Window Regulator Malfunction

Medium
B0372 Sequential Code

B0372: Seat Position Sensor Circuit Malfunction

Medium
B0374 Sequential Code

B0374: Immobilizer System Malfunction

Medium
B0375 Sequential Code

B0375: Audio System Fault

Medium

💡 Why These Codes Are Related:

  • • Similar Issues: Same root cause or component failure
  • • Related Problems: Often occur together due to system interactions
  • • Sequential Codes: Progressive failure stages or multiple sensors
  • • Same System: Components within the same automotive system