← View Generic B0789 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B0789: B0789: Headlight Dim or Failure

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 B0789 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The B0789 code indicates a problem with the headlight circuit, possibly due to a faulty headlight relay, fuse, or wiring issue.
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Symptoms

  • • Dim or failed headlights
  • • intermittent headlight operation
  • • or a warning light on the dashboard.
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Common Causes

  • • Faulty headlight relay
  • • blown headlight fuse
  • • corroded or damaged wiring
  • • or a malfunctioning headlight module.
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How to Fix B0789 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the headlight relay and replace it if faulty. 2. Inspect the headlight fuse and replace it if blown. 3. Inspect and clean the wiring and connectors. 4. Test the headlight module and replace it if faulty.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Headlight relay Shop ↗ Headlight fuse Shop ↗ Wiring and connectors Shop ↗

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Related Diagnostic Codes

Other codes that may appear with B0789

B0787 Sequential Code

B0787: Power Window Motor Control Circuit Malfunction

Medium
B0788 Sequential Code

B0788: Seat Position Sensor Circuit Malfunction

Medium
B0790 Sequential Code

B0790: Body System Security Malfunction

Medium
B0791 Sequential Code

B0791: 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