← View Generic B1477 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B1477: B1477: Body Control Module (BCM) Lighting Circuit Malfunction

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$100 - $500
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 B1477 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The Body Control Module (BCM) has detected a malfunction in the lighting circuit, which may cause issues with the vehicle's exterior lights, such as the headlights, taillights, or turn signals.
⚠️

Symptoms

  • • Dim or inoperative exterior lights
  • • flickering lights
  • • or lights that do not turn off when the ignition is turned off
🔍

Common Causes

  • • Faulty BCM
  • • wiring harness damage
  • • blown fuse
  • • or a malfunctioning lighting component
🛠️

How to Fix B1477 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the BCM for any fault codes and clear them. 2. Inspect the wiring harness for damage and repair or replace as needed. 3. Check the fuses and replace any blown ones. 4. Test the lighting components and replace any faulty ones.

🔧

Need Maintenance Info for Your SILVERADO 1500 PICKUP?

Get oil capacity, filter specs, and torque settings for your specific 2020 Chevrolet SILVERADO 1500 PICKUP.

View 2020 Chevrolet SILVERADO 1500 PICKUP Specs

Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

BCM Shop ↗ wiring harness Shop ↗ fuses Shop ↗ lighting components Shop ↗

Essential Tool

Must Have

OBD2 Scanner

Read & clear codes on your 2020 Chevrolet SILVERADO 1500 PICKUP

Shop Scanners ↗
🔗

Related Diagnostic Codes

Other codes that may appear with B1477

B1475 Sequential Code

B1475: Power Window Regulator Malfunction

Medium
B1476 Sequential Code

B1476: Seat Switch Circuit Malfunction

Medium
B1478 Sequential Code

B1478: Immobilizer System Malfunction

Medium
B1479 Sequential Code

B1479: 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