← View Generic B0389 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B0389: B0389: Exterior Lighting Malfunction

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$50 - $200
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
✅ Yes
Save money
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 B0389 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

This code indicates a malfunction in the exterior lighting system, such as the headlights, taillights, or turn signals.
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Symptoms

  • • Dim or inoperative exterior lights
  • • warning lights on the dashboard
  • • or erratic lighting behavior.
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Common Causes

  • • Faulty headlight or taillight bulbs
  • • wiring issues
  • • or a malfunctioning body control module.
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How to Fix B0389 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check and replace faulty bulbs. 2. Inspect and repair or replace wiring as needed. 3. Update the body control module's software if necessary.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

headlight or taillight bulb Shop ↗ wiring harness Shop ↗

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Related Diagnostic Codes

Other codes that may appear with B0389

B0387 Sequential Code

B0387: Power Window Regulator Malfunction

Medium
B0388 Sequential Code

B0388: Seat Position Sensor Circuit Malfunction

Medium
B0390 Sequential Code

B0390: Body Control Module (BCM) Security Fault

Medium
B0391 Sequential Code

B0391: Audio System Malfunction

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