← View Generic B1109 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B1109: B1109: Malfunction of Exterior Lighting

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 B1109 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

This code indicates a problem with the exterior lighting system, such as headlights, taillights, or turn signals. The issue may be related to a faulty bulb, wiring, or a malfunctioning control module.
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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 or burnt-out bulbs
  • • loose or corroded wiring connections
  • • damaged or malfunctioning lighting control modules
  • • or issues with the vehicle's electrical system
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How to Fix B1109 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check and replace faulty bulbs, 2. Inspect and clean or repair wiring connections, 3. Test and replace the lighting control module if necessary, 4. Check the vehicle's electrical system for any issues

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Exterior lighting bulb Shop ↗ Wiring harness Shop ↗

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Related Diagnostic Codes

Other codes that may appear with B1109

B1107 Sequential Code

B1107: Power Window Switch Circuit Malfunction

Medium
B1108 Sequential Code

B1108: Seat Position Sensor Circuit Malfunction

Medium
B1110 Sequential Code

B1110: Body Control Module (BCM) Security System Malfunction

Medium
B1111 Sequential Code

B1111: 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