← View Generic B0133 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B0133: B0133: Body System Code B0133 - 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 B0133 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The B0133 code indicates a malfunction in the body control module's (BCM) ability to control the exterior lighting system, such as the headlights, taillights, or brake lights.
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Symptoms

  • • Inoperative or flickering exterior lights
  • • warning lights on the dashboard
  • • or a combination of both.
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Common Causes

  • • Faulty BCM
  • • wiring issues
  • • blown fuses
  • • or a malfunctioning exterior light module.
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How to Fix B0133 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the BCM and exterior light module for any signs of physical damage or corrosion. 2. Inspect the wiring harness for any signs of damage or wear. 3. Check the fuses and replace any blown ones. 4. Test the exterior lights to isolate the faulty component. 5. Replace the faulty component(s) and retest the system.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Body Control Module Shop ↗ Exterior Light Module Shop ↗ Wiring Harness Shop ↗

Essential Tool

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Related Diagnostic Codes

Other codes that may appear with B0133

B0131 Sequential Code

B0131: Power Window Relay Circuit Malfunction

Medium
B0132 Sequential Code

B0132: Seat Switch Circuit Malfunction

Medium
B0134 Sequential Code

B0134: Immobilizer System Malfunction

Medium
B0135 Sequential Code

B0135: 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