AutoCodes – GMC – B1740 2016 GMC Sierra

B1740 2016 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 2016 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 189

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 2016 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 2016 GMC Sierra - Driver Seat Front Down Switch Circuit - AutoCodes.com — B1740 2016 GMC Sierra Code - Driver Seat Front Down Switch Circuit

What does this mean?

What are the Possible Causes of the DTC B1740 2016 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 2016 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 2016 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.

Need more information about the B1740 2016 GMC Sierra code?

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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 2016 GMC Sierra Code

1. What does OBDII code B1740 mean on a 2016 GMC Sierra?

Code B1740 indicates an issue with the Driver Seat Front Down Switch Circuit, which controls the lowering function of the front portion of the driver seat.

2. What are the symptoms of code B1740 in a 2016 GMC Sierra?

The primary symptom is the inability to adjust the front part of the driver seat downward. There may also be unresponsive seat adjustments or intermittent functionality.

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. Can I still drive my 2016 GMC Sierra with a B1740 code?

Yes, but you may experience inconvenience due to limited seat adjustment functionality, which could impact comfort during driving.

5. How do I diagnose a B1740 trouble code?

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

6. What repairs can fix the B1740 code?

Repairs could include replacing the seat adjustment switch, repairing or replacing damaged wiring, or replacing the seat motor if itâ€™s defective.

7. How much does it cost to fix the B1740 code on a 2016 GMC Sierra?

The cost varies depending on the issue. Replacing a seat adjustment switch may cost $100-$300, while motor or wiring repairs could be more expensive.

8. Can I reset the B1740 code without fixing the issue?

The code can be cleared temporarily using a scan tool, but it will return if the underlying issue isnâ€™t resolved.

9. Is the B1740 code related to other seat adjustment issues?

Yes, other codes may accompany B1740 if there are additional problems in the seat adjustment system, such as motor or module malfunctions.

10. Do I need a professional to repair a B1740 code?

If youâ€™re experienced with electrical diagnostics and repairs, you may be able to fix it yourself. Otherwise, itâ€™s best to consult a qualified technician.