← View Generic B1693 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B1693: B1693: 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 B1693 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
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Common Causes

  • • Faulty BCM
  • • wiring issues
  • • blown fuse
  • • or a malfunctioning lighting component
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How to Fix B1693 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the BCM for any fault codes and clear them if necessary. 2. Inspect the wiring and connectors for damage or corrosion. 3. Replace the BCM if it is faulty. 4. Check the fuses and replace any blown ones. 5. Test the lighting components to identify any faulty ones and replace them.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Body Control Module Shop ↗ Wiring harness Shop ↗ Fuses Shop ↗ Lighting components Shop ↗

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Related Diagnostic Codes

Other codes that may appear with B1693

B1691 Sequential Code

B1691: Power Window Circuit Malfunction

Medium
B1692 Sequential Code

B1692: Seat Position Sensor Circuit Malfunction

Medium
B1694 Sequential Code

B1694: Immobilizer System Malfunction

High
B1695 Sequential Code

B1695: Audio System Fault

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