← View Generic B2045 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B2045: B2045: Body Control Module (BCM) Malfunction - Lighting

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 B2045 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The Body Control Module (BCM) has detected a malfunction in the lighting system, 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 erratic lighting behavior.
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Common Causes

  • • Faulty BCM
  • • wiring issues
  • • blown fuses
  • • or damaged lighting components.
🛠️

How to Fix B2045 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the BCM for any fault codes and clear them. 2. Inspect and repair any damaged wiring or connectors. 3. Replace any blown fuses. 4. Test the lighting system to identify any faulty components and replace them as needed.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

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

Essential Tool

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OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B2045

B2043 Sequential Code

B2043: Power Window Circuit Malfunction

Medium
B2044 Sequential Code

B2044: Seat Switch Circuit Malfunction

Medium
B2046 Sequential Code

B2046: Immobilizer System Malfunction

Medium
B2047 Sequential Code

B2047: 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