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B1735 2018 GMC Sierra Code - Driver Seat Front Up Switch Circuit

Quick Answer

The B1735 diagnostic trouble code (DTC) for a 2018 GMC Sierra pertains to the driver seat front up switch circuit. Common causes include Faulty front up switch on the driver's seat control panel, Wiring harness issues, such as a short circuit or open circuit, Faulty 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
B1735 2018 GMC Sierra indicates Driver Seat Front Up Switch Circuit.
Common causes
Common causes include Faulty front up switch on the driver's seat control panel, Wiring harness issues, such as a short circuit or open circuit, Faulty 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 11, 2024
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Code B1735 2018 GMC Sierra Description

The B1735 diagnostic trouble code (DTC) for a 2018 GMC Sierra pertains to the driver seat front up switch circuit. This code indicates that there is a malfunction in the circuit responsible for controlling the front up movement of the driver's seat. In modern vehicles, the seat adjustment controls are often electronic, with switches that send signals to a control module to adjust the seat position.

OBDII Code B1735 2018 GMC Sierra - Driver Seat Front Up Switch Circuit
B1735 2018 GMC Sierra Code - Driver Seat Front Up Switch Circuit

Common Causes of B1735 2018 GMC Sierra

  1. Faulty front up switch on the driver's seat control panel.
  2. Wiring harness issues, such as a short circuit or open circuit.
  3. Faulty seat control module.
  4. Loose or corroded electrical connections.
  5. Physical obstruction preventing the seat from moving.

Symptoms of B1735 2018 GMC Sierra

  1. Inability to adjust the driver's seat position.
  2. Erratic movement of the driver's seat when attempting to adjust it.
  3. Unresponsive front up switch on the driver's seat control panel.
  4. Seat movement in the wrong direction when using the front up switch.

How to Fix B1735 2018 GMC Sierra

  1. Begin by diagnosing the specific cause of the B1735 code using a diagnostic scanner to pinpoint the issue.
  2. Inspect the front up switch on the driver's seat control panel for any visible damage or signs of wear. Replace the switch if necessary.
  3. Check the wiring harness for any signs of damage, such as frayed wires or corrosion. Repair or replace the wiring as needed.
  4. Inspect the seat control module for any faults or malfunctions. Replace the module if necessary.
  5. Test the seat adjustment functionality after completing the repairs to ensure that the issue has been resolved.

Cost to Fix B1735 2018 GMC Sierra

The typical repair costs for addressing a B1735 code on a 2018 GMC Sierra can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the cost of parts for this repair could range from $50 to $200, with labor costs adding an additional $100 to $300. However, it is important to note that labor rates at auto repair shops can vary widely, with hourly rates typically ranging between $80 and $150. Additional costs may also be incurred for diagnostic testing and any necessary replacement parts. It is advisable to obtain a detailed quote from a reputable auto repair shop to get a more accurate estimate for this repair.

What does this mean?

Tech Notes for B1735 2018 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 B1735 2018 GMC Sierra Code

1. What does the OBDII code B1735 mean on a 2018 GMC Sierra?

B1735 indicates an issue with the Driver Seat Front Up Switch Circuit, which involves the electrical system controlling the front height adjustment of the driver’s seat.

2. What are common symptoms of code B1735 in a 2018 GMC Sierra?

Symptoms may include the driver seat not adjusting properly in the front height position, an unresponsive seat adjustment switch, or an illuminated check engine or warning light.

3. What causes the B1735 code to appear on a 2018 GMC Sierra?

Common causes include a faulty driver seat front up switch, damaged wiring or connectors in the switch circuit, a blown fuse, or an issue with the seat control module.

4. How can I diagnose the B1735 code on my GMC Sierra?

Diagnose by using a scan tool to confirm the code, visually inspecting the wiring and connectors for damage, testing the driver seat front up switch for proper function, and checking the seat control module for faults.

5. Can I still drive my 2018 GMC Sierra with the B1735 code?

Yes, you can still drive the vehicle, but the front height adjustment of the driver seat may not work, which could affect comfort or driving ergonomics.

6. How do I fix the B1735 code on a 2018 GMC Sierra?

Repairs may include replacing the faulty driver seat front up switch, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the seat control module if necessary.

7. How much does it cost to fix the B1735 code on a GMC Sierra?

Repair costs vary depending on the issue, but replacing the seat switch typically costs $100-$300, while wiring repairs or module replacements may cost more.

8. Can I fix the B1735 code on my GMC Sierra myself?

If you’re comfortable with basic electrical diagnostics and repairs, you may be able to fix simple issues like replacing the switch or repairing damaged wiring. For complex issues, professional assistance is recommended.

9. Does the B1735 code require reprogramming the seat control module?

Reprogramming is not always required, but if the issue lies within the seat control module, reprogramming or replacement may be necessary.

10. Will clearing the B1735 code with a scan tool fix the issue?

Clearing the code will remove it temporarily, but the underlying issue must be resolved to prevent the code from returning.

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