← View Generic B3074 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B3074: B3074: Door Locks Actuator 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 B3074 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The B3074 code indicates a malfunction in the door lock actuator, which may cause the doors to malfunction or not lock/unlock properly.
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Symptoms

  • • Doors not locking/unlocking
  • • clicking sounds when trying to lock/unlock
  • • door ajar warning light on
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Common Causes

  • • Faulty door lock actuator
  • • wiring issue
  • • faulty door lock module
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How to Fix B3074 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Disconnect battery to reset system, 2. Check wiring and connectors for damage or corrosion, 3. Replace faulty door lock actuator or module

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Door lock actuator Shop ↗ Wiring harness Shop ↗

Essential Tool

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Related Diagnostic Codes

Other codes that may appear with B3074

B3072 Sequential Code

B3072: Airbag System Fault

High
B3073 Sequential Code

B3073: Climate Control Fan Motor Malfunction

Medium
B3075 Sequential Code

B3075: Power Window Regulator Circuit Malfunction

Medium
B3076 Sequential Code

B3076: 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