← View Generic B1165 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B1165: B1165: 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 B1165 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
  • • faulty turn signal indicators
  • • or intermittent lighting issues.
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Common Causes

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

How to Fix B1165 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the BCM for any stored trouble codes and clear them. 2. Inspect the wiring harness for damage and repair or replace as needed. 3. Check the fuse box for blown fuses and replace them if necessary. 4. Test the lighting module and replace it if faulty.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Body Control Module Shop ↗ Wiring Harness Shop ↗ Fuses Shop ↗ Lighting Module Shop ↗

Essential Tool

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OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B1165

B1163 Sequential Code

B1163: Power Window Relay Circuit Malfunction

Medium
B1164 Sequential Code

B1164: Seat Position Sensor Circuit Malfunction

Medium
B1166 Sequential Code

B1166: Body Control Module (BCM) Security System Malfunction

Medium
B1167 Sequential Code

B1167: 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