← View Generic B1242 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B1242: B1242: Door Locks Malfunction

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$100 - $300
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 B1242 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

This code indicates a malfunction in the door lock system, preventing proper locking or unlocking of the doors.
⚠️

Symptoms

  • • Doors may not lock or unlock properly
  • • or may lock/unlock randomly
  • • or may not respond to key fob commands.
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Common Causes

  • • Faulty door lock actuator
  • • wiring issue
  • • faulty door lock module
  • • or a problem with the door lock switch.
🛠️

How to Fix B1242 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check door lock actuator for proper operation and replace if faulty. 2. Inspect wiring for damage or corrosion and repair/replace as needed. 3. Test door lock module and replace if faulty. 4. Check door lock switch for proper operation and replace if faulty.

🔧

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Door lock actuator Shop ↗ Wiring harness Shop ↗ Door lock module Shop ↗ Door lock switch Shop ↗

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Related Diagnostic Codes

Other codes that may appear with B1242

B1240 Sequential Code

B1240: Airbag System Malfunction

High
B1241 Sequential Code

B1241: Climate Control Temperature Sensor Malfunction

Medium
B1243 Sequential Code

B1243: Power Window Relay Circuit Malfunction

Medium
B1244 Sequential Code

B1244: Seat Position Sensor Circuit 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