← View Generic B1340 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

B1340: B1340: Seat Switch Circuit Malfunction

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$100 - $300
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 B1340 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The B1340 code indicates a problem with the seat switch circuit, which controls the seat's position, lumbar support, and recline functions.
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Symptoms

  • • Seat position or function not working correctly
  • • lumbar support or recline not adjusting
  • • seat may be stuck or unresponsive.
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Common Causes

  • • Faulty seat switch
  • • wiring issue
  • • or electrical connector problem.
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How to Fix B1340 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Disconnect the battery to reset the system. 2. Check and clean the seat switch and electrical connectors. 3. Replace the faulty seat switch if necessary. 4. Check and repair any wiring issues.

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Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Seat switch Shop ↗ Electrical connector Shop ↗

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Related Diagnostic Codes

Other codes that may appear with B1340

B1338 Sequential Code

B1338: Door Locks Actuator Circuit Malfunction

Medium
B1339 Sequential Code

B1339: Power Window Relay Circuit Malfunction

Medium
B1341 Sequential Code

B1341: Turn Signal Lamp Malfunction

Medium
B1342 Sequential Code

B1342: Immobilizer System Malfunction

High

💡 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