← View Generic B3813 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B3813: B3813: Body System Code - Malfunctioning Headlight

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 B3813 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The B3813 code indicates a malfunction in the headlight system, which can cause the headlights to malfunction or not turn on.
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Symptoms

  • • Headlights not turning on
  • • dim or flickering headlights
  • • warning lights on dashboard
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Common Causes

  • • Faulty headlight switch
  • • bad headlight bulb
  • • wiring issue
  • • headlight relay failure
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How to Fix B3813 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check and replace the headlight bulb if necessary. 2. Inspect and clean the headlight switch. 3. Check and repair any wiring issues. 4. Replace the headlight relay if faulty.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

headlight bulb Shop ↗ headlight switch Shop ↗ wiring harness Shop ↗ headlight relay Shop ↗

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Related Diagnostic Codes

Other codes that may appear with B3813

B3811 Sequential Code

B3811: Power Window Circuit Malfunction

Medium
B3812 Sequential Code

B3812: Seat Position Sensor Circuit Malfunction

Medium
B3814 Sequential Code

B3814: Body System Security Malfunction

Medium
B3815 Sequential Code

B3815: 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