Engine-Codes.com
Engine-Codes – GMC – B1740 2015 GMC Sierra

B1740 2015 GMC Sierra Code - Driver Seat Front Down Switch Circuit

Quick Answer

The B1740 diagnostic trouble code (DTC) for a 2015 GMC Sierra specifically relates to the driver seat front down switch circuit. Common causes include Faulty front down switch, Damaged wiring or connectors in the circuit, Malfunctioning control module. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
B1740 2015 GMC Sierra indicates Driver Seat Front Down Switch Circuit.
Common causes
Common causes include Faulty front down switch, Damaged wiring or connectors in the circuit, Malfunctioning control module.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code B1740 2015 GMC Sierra Description

The B1740 diagnostic trouble code (DTC) for a 2015 GMC Sierra specifically relates to the driver seat front down switch circuit. This code indicates that there is a malfunction in the circuit that controls the movement of the driver seat in the downward direction. The driver seat in modern vehicles is equipped with various switches that allow the driver to adjust the seat position for comfort and visibility while driving. The front down switch circuit is responsible for lowering the front part of the seat, which is crucial for achieving the desired seating position.

OBDII Code B1740 2015 GMC Sierra - Driver Seat Front Down Switch Circuit
B1740 2015 GMC Sierra Code - Driver Seat Front Down Switch Circuit

Common Causes of B1740 2015 GMC Sierra

  1. Faulty front down switch.
  2. Damaged wiring or connectors in the circuit.
  3. Malfunctioning control module.
  4. Defective seat motor.
  5. Water damage or corrosion in the circuit components.

Symptoms of B1740 2015 GMC Sierra

  1. Inability to lower the front part of the driver seat.
  2. Unresponsive front down switch when pressed.
  3. Erratic movement of the driver seat in the downward direction.
  4. Strange noises coming from the seat when attempting to adjust it.
  5. Warning light on the dashboard indicating a seat-related issue.

How to Fix B1740 2015 GMC Sierra

  1. Begin by conducting a visual inspection of the front down switch, wiring, and connectors for any visible damage or corrosion.
  2. Use a multimeter to test the continuity of the wiring and connectors in the circuit to identify any open or short circuits.
  3. Test the front down switch for proper functionality by checking for continuity when it is pressed.
  4. If the switch and wiring are in good condition, proceed to test the control module and seat motor for proper operation.
  5. Replace any faulty components identified during the diagnostic process, such as the front down switch, wiring harness, control module, or seat motor.

Cost to Fix B1740 2015 GMC Sierra

The typical repair costs for addressing the B1740 DTC on a 2015 GMC Sierra can vary depending on the specific cause of the issue and the cost of replacement parts. In general, the cost of replacing a front down switch or repairing wiring/connectors can range from $50 to $200, while replacing a control module or seat motor can cost anywhere from $150 to $500 or more. Labor costs at auto repair shops can range from $80 to $150 per hour, and the total repair cost may also include diagnostic time. It's advisable to consult with a professional mechanic to get a more accurate estimate based on the specific circumstances of your vehicle.

What does this mean?

Tech Notes for B1740 2015 GMC Sierra









User Submitted Video

Need more information about the B1740 2015 GMC Sierra code?

Need more information on how to fix the B1740 2015 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1740 2015 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1740 2015 GMC Sierra Code

1. What does the OBDII code B1740 mean on a 2015 GMC Sierra?

The code B1740 indicates a fault in the Driver Seat Front Down Switch Circuit, which controls the downward movement of the driver’s seat.

2. What are the common symptoms of the B1740 code?

Symptoms may include the driver’s seat not lowering properly, unresponsive seat adjustment controls, or intermittent functionality of the seat adjustment.

3. What causes the B1740 code to appear?

The code can be triggered by a faulty seat adjustment switch, damaged wiring, a poor electrical connection in the circuit, or a malfunctioning seat motor.

4. How can I diagnose the B1740 code?

Start by inspecting the seat adjustment switch and its wiring for damage. Test the circuit for continuity and check for any loose or corroded connections.

5. Can the B1740 code be caused by a blown fuse?

Yes, a blown fuse related to the seat adjustment system can potentially cause this code, so it’s important to check the fuse box.

6. How do you fix the B1740 code on a 2015 GMC Sierra?

Repairs may include replacing the seat adjustment switch, repairing damaged wiring, cleaning corroded connectors, or replacing the seat motor if necessary.

7. Is it safe to drive with the B1740 code active?

Yes, it is generally safe to drive, but the driver’s seat may not adjust properly, which could affect comfort and driving position.

8. How much does it cost to repair the B1740 code?

Repair costs can vary, ranging from $50 for a simple wiring repair to $300 or more if the seat motor or switch needs replacement.

9. Can I reset the B1740 code without repairing the issue?

You can clear the code with an OBDII scanner, but it will likely return if the underlying issue isn’t resolved.

10. Does the B1740 code require professional repair, or can I fix it myself?

If you’re comfortable with basic electrical diagnostics and repairs, you might be able to fix it yourself. Otherwise, it’s best to consult a professional mechanic.

Discuss the causes and fixes for B1740 2015 GMC Sierra OBDII Code

Submit a New Comment

Code B1740 2015 GMC Sierra comments

No comments found for this page.