← View Generic B3705 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B3705: B3705: Climate Control Fan Motor 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 B3705 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The B3705 code indicates a malfunction in the climate control fan motor, which may cause the fan to malfunction or not function at all.
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Symptoms

  • • Inadequate airflow
  • • uneven airflow
  • • or no airflow from the climate control vents
  • • unusual noises from the fan
  • • or a faulty fan motor
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Common Causes

  • • Faulty fan motor
  • • faulty fan motor resistor
  • • faulty climate control module
  • • or a wiring issue
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How to Fix B3705 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Disconnect the battery to prevent any accidental starts. 2. Locate the fan motor resistor and check for any signs of damage or corrosion. 3. Test the fan motor resistor for continuity using a multimeter. 4. If the resistor is faulty, replace it with a new one. 5. If the fan motor is faulty, replace it with a new one. 6. Check the climate control module for any signs of damage or corrosion. 7. Test the climate control module for any faults using a scan tool. 8. If the module is faulty, replace it with a new one.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Fan motor resistor Shop ↗ Fan motor Shop ↗ Climate control module Shop ↗

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Related Diagnostic Codes

Other codes that may appear with B3705

B3703 Sequential Code

B3703: Audio System Fault

Medium
B3704 Sequential Code

B3704: Airbag System Fault

High
B3706 Sequential Code

B3706: Door Locks Actuator Malfunction

Medium
B3707 Sequential Code

B3707: Power Window Regulator 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