← View Generic B0509 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B0509: B0509: Intermittent Turn Signal Malfunction

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$50 - $150
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 B0509 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

This code indicates a problem with the turn signal system, specifically with the flasher unit or wiring. The turn signals may flash erratically or not at all.
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Symptoms

  • • Turn signals not working
  • • flashing erratically
  • • or not flashing at all
  • • may be accompanied by a dashboard warning light.
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Common Causes

  • • Faulty turn signal flasher unit
  • • corroded or damaged wiring
  • • blown fuse
  • • or a problem with the turn signal switch.
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How to Fix B0509 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the turn signal flasher unit for damage or corrosion and replace if necessary. 2. Inspect and clean the wiring and connectors. 3. Check the fuse box for a blown fuse and replace if necessary. 4. Test the turn signal switch for proper function.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Turn signal flasher unit Shop ↗ Wiring harness Shop ↗ Fuses Shop ↗

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Related Diagnostic Codes

Other codes that may appear with B0509

B0507 Sequential Code

B0507: Power Window Circuit Malfunction

Medium
B0508 Sequential Code

B0508: Seat Position Sensor Circuit Malfunction

Medium
B0510 Sequential Code

B0510: Body System Security Malfunction

Medium
B0511 Sequential Code

B0511: 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