AutoCodes – GMC – B1740 2014 GMC Sierra

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

Quick Answer

The Seat Memory Control Module supplies a reference voltage to each signal circuit of the Driver Seat Adjuster Switch. Common causes include Faulty Driver Seat Adjuster Switch, Driver Seat Adjuster Switch harness is open or shorted, Driver Seat Adjuster Switch circuit poor electrical connection. 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 Adjuster Switch, Driver Seat Adjuster Switch harness is open or shorted, Driver Seat Adjuster Switch circuit poor electrical connection.
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.

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Code Popularity 157

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Apr 23, 2023

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code B1740 2014 GMC Sierra Description

The Seat Memory Control Module supplies a reference voltage to each signal circuit of the Driver Seat Adjuster Switch. When the power seat or lumbar switches are pressed, the appropriate signal circuit from the Seat Memory Control Module is pulled low through the switch contacts indicating the power seat command. The Seat Memory Control Module then commands the driver seat or lumbar to move in response to the switch signals. The Diagnostic Trouble Code (DTC) will be set when there is a short to ground on a switch signal circuit.

OBDII Code B1740 2014 GMC Sierra - Driver Seat Front Down Switch Circuit - AutoCodes.com — B1740 2014 GMC Sierra Code - Driver Seat Front Down Switch Circuit

What does this mean?

What are the Possible Causes of the DTC B1740 2014 GMC Sierra?

Faulty Driver Seat Adjuster Switch
Driver Seat Adjuster Switch harness is open or shorted
Driver Seat Adjuster Switch circuit poor electrical connection
Faulty Seat Memory Control Module

How to Fix the DTC B1740 2014 GMC Sierra?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1740 2014 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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 itâ€™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.