AutoCodes – GMC – B1750 2018 GMC Sierra

B1750 2018 GMC Sierra Code - Driver Seat Rear 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: B1750 2018 GMC Sierra indicates Driver Seat Rear 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 154

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 24, 2023

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code B1750 2018 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 B1750 2018 GMC Sierra - Driver Seat Rear Down Switch Circuit - AutoCodes.com — B1750 2018 GMC Sierra Code - Driver Seat Rear Down Switch Circuit

What does this mean?

What are the Possible Causes of the DTC B1750 2018 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 B1750 2018 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

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1750 2018 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 B1750 2018 GMC Sierra Code

1. What does the OBDII code B1750 mean on a 2018 GMC Sierra?

Code B1750 indicates an issue with the driver seat rear down switch circuit, which controls the rear tilt adjustment of the driverâ€™s seat.

2. What are the symptoms of code B1750 in a 2018 GMC Sierra?

Common symptoms include the inability to adjust the rear tilt of the driverâ€™s seat and possible unresponsiveness of the seat adjustment buttons.

3. What causes the B1750 code to appear?

This code is typically caused by a faulty driver seat rear down switch, damaged wiring, a poor electrical connection, or a malfunction in the seat control module.

4. How can I diagnose the B1750 code on my GMC Sierra?

Start by inspecting the wiring and connectors around the driver seat adjustment switch for damage or corrosion. Use a scan tool to check for related codes and test the functionality of the switch and circuit.

5. Can I still drive my GMC Sierra with code B1750?

Yes, you can still drive the vehicle, but the rear tilt adjustment for the driverâ€™s seat may not function properly, affecting comfort and ergonomics.

6. How do I fix the B1750 code on a 2018 GMC Sierra?

Repairs may include replacing the faulty seat adjustment switch, repairing damaged wiring or connectors, or recalibrating or replacing the seat control module.

7. What tools are needed to troubleshoot the B1750 code?

Youâ€™ll need a diagnostic scan tool, a multimeter to check electrical connections, and possibly a repair manual for wiring diagrams specific to your Sierra.

8. How much does it cost to fix the B1750 code?

Repair costs can vary but typically range from $50 to $300 depending on whether the switch, wiring, or control module needs replacement.

9. Can a weak battery cause the B1750 code?

Yes, a weak or failing battery can cause electrical issues, including triggering this code, by affecting the power supplied to the seat adjustment system.

10. Do I need a professional mechanic to fix code B1750?

While basic checks like inspecting wiring can be done at home, more advanced diagnostics or module replacements may require a professional mechanic with specialized tools.