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B1740 2014 GMC Sierra Code - Driver Seat Front Down Switch Circuit

Quick Answer

The B1740 diagnostic trouble code (DTC) for a 2014 GMC Sierra relates to the driver seat front down switch circuit. Common causes include Faulty driver seat front down switch, Damaged wiring or connectors in the circuit, Malfunctioning seat 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 2014 GMC Sierra indicates Driver Seat Front Down Switch Circuit.
Common causes
Common causes include Faulty driver seat front down switch, Damaged wiring or connectors in the circuit, Malfunctioning seat 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 16, 2024
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Code B1740 2014 GMC Sierra Description

The B1740 diagnostic trouble code (DTC) for a 2014 GMC Sierra relates to the driver seat front down switch circuit. This code indicates that there is a malfunction in the circuit responsible for controlling the front down movement of the driver's seat. The driver seat front down switch circuit is part of the seat control system, allowing the driver to adjust the seat position for comfort while driving. When this circuit is compromised, it can lead to issues with adjusting the seat position, potentially causing discomfort and affecting the driver's ability to operate the vehicle safely.

OBDII Code B1740 2014 GMC Sierra - Driver Seat Front Down Switch Circuit
B1740 2014 GMC Sierra Code - Driver Seat Front Down Switch Circuit

Common Causes of B1740 2014 GMC Sierra

  1. Faulty driver seat front down switch.
  2. Damaged wiring or connectors in the circuit.
  3. Malfunctioning seat control module.
  4. Loose connections in the circuit.
  5. Corrosion or moisture damage in the circuit components.

Symptoms of B1740 2014 GMC Sierra

  1. Inability to adjust the driver's seat position downward.
  2. Unresponsive or erratic movement of the driver's seat when using the front down switch.
  3. Intermittent functioning of the front down switch for the driver's seat.
  4. Illumination of the seat control system warning light on the dashboard.

How to Fix B1740 2014 GMC Sierra

  1. Begin by conducting a visual inspection of the wiring harnesses, connectors, and switch for any visible damage or corrosion.
  2. Use a multimeter to test the continuity of the circuit and check for any open or short circuits.
  3. Test the driver seat front down switch for proper functionality and replace if necessary.
  4. Inspect the seat control module for any signs of malfunction and replace if needed.
  5. Repair or replace any damaged wiring or connectors in the circuit.

Cost to Fix B1740 2014 GMC Sierra

The typical repair costs for addressing the B1740 DTC on a 2014 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of parts such as a new driver seat front down switch, seat control module, or wiring components can range from $50 to $200. Labor costs at auto repair shops typically range between $80 and $150 per hour. The total repair cost can therefore range from $150 to $500 or more, depending on the extent of the repairs needed. It's advisable to consult with a professional mechanic to get an accurate estimate based on the specific diagnosis and repair requirements for your vehicle.

What does this mean?

Tech Notes for B1740 2014 GMC Sierra









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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 2014 GMC Sierra Code

1. What does the OBDII code B1740 mean on a 2014 GMC Sierra?

B1740 indicates an issue with the Driver Seat Front Down Switch Circuit, which involves the electrical system controlling the front down movement of the driver seat.

2. What are common symptoms of the B1740 code in a 2014 GMC Sierra?

Symptoms include the front portion of the driver seat not moving down, unresponsiveness of the seat adjustment switch, or intermittent operation of the seat motor.

3. What causes the B1740 code to appear?

Common causes include a faulty seat adjustment switch, damaged wiring or connectors in the circuit, or a malfunctioning seat motor.

4. How can I diagnose the B1740 code on my GMC Sierra?

Start by inspecting the seat adjustment switch, wiring, and connectors for visible damage or corrosion. Use a multimeter to check for proper voltage and continuity in the circuit.

5. Can I still drive with the B1740 code active?

Yes, you can still drive, but the driver seat adjustment may not function properly, which could affect comfort and driving ergonomics.

6. How do I fix the B1740 code on a 2014 GMC Sierra?

Repairs may involve replacing the seat adjustment switch, repairing or replacing damaged wiring or connectors, or replacing the seat motor if it’s defective.

7. How much does it cost to fix the B1740 code?

The cost depends on the specific issue. Replacing a seat adjustment switch typically costs $50 to $150 for parts, while labor costs vary based on the repair complexity.

8. Can a blown fuse cause the B1740 code?

While unlikely, a blown fuse in the seat adjustment circuit could contribute to the issue. Check the fuse box for any blown fuses related to the seat controls.

9. Do I need to clear the B1740 code after repairs?

Yes, after completing repairs, use an OBDII scanner to clear the code and verify that the issue has been resolved.

10. Can I fix the B1740 code myself?

If you have basic automotive repair skills, you may be able to fix the issue by inspecting and replacing the faulty switch, wiring, or connectors. For more complex repairs, professional assistance is recommended.

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