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Engine-Codes – GMC – B1835 2015 GMC Sierra

B1835 2015 GMC Sierra Code - Driver Seat Lumbar Rearward Switch Circuit

Quick Answer

The B1835 diagnostic trouble code (DTC) for a 2015 GMC Sierra specifically relates to the driver seat lumbar rearward switch circuit. Common causes include Faulty lumbar support switch, Wiring issues or shorts in the circuit, Malfunctioning lumbar support motor. 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
B1835 2015 GMC Sierra indicates Driver Seat Lumbar Rearward Switch Circuit.
Common causes
Common causes include Faulty lumbar support switch, Wiring issues or shorts in the circuit, Malfunctioning lumbar support motor.
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 B1835 2015 GMC Sierra Description

The B1835 diagnostic trouble code (DTC) for a 2015 GMC Sierra specifically relates to the driver seat lumbar rearward switch circuit. This code indicates that there is a malfunction in the circuit that controls the driver seat's lumbar support moving in the rearward direction. The lumbar support feature in modern vehicles allows drivers to adjust the lower back support to their liking, providing comfort and reducing fatigue during long drives.

OBDII Code B1835 2015 GMC Sierra - Driver Seat Lumbar Rearward Switch Circuit
B1835 2015 GMC Sierra Code - Driver Seat Lumbar Rearward Switch Circuit

Common Causes of B1835 2015 GMC Sierra

  1. Faulty lumbar support switch.
  2. Wiring issues or shorts in the circuit.
  3. Malfunctioning lumbar support motor.
  4. Loose or corroded electrical connections.
  5. Damage to the lumbar support mechanism itself.

Symptoms of B1835 2015 GMC Sierra

  1. Inability to adjust the driver seat lumbar support rearward.
  2. Lumbar support stuck in one position.
  3. Unresponsive or erratic behavior from the lumbar support switch.
  4. Discomfort or pain in the lower back during driving.
  5. Warning light illuminated on the dashboard related to the driver seat lumbar support.

How to Fix B1835 2015 GMC Sierra

  1. Begin by conducting a thorough inspection of the lumbar support switch, wiring, and motor to identify any visible damage or issues.
  2. Use a multimeter to test the continuity of the circuit and check for any shorts or open circuits.
  3. Replace the faulty lumbar support switch if it is found to be defective.
  4. Repair or replace any damaged wiring or connectors in the circuit.
  5. If the issue persists, replace the lumbar support motor to ensure proper functionality.

Cost to Fix B1835 2015 GMC Sierra

The typical repair costs for addressing the B1835 code on a 2015 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay between $150 to $300 for parts and labor to resolve this problem. Keep in mind that diagnosis time and labor rates at auto repair shops can vary, so it's recommended to obtain quotes from local shops for a more accurate estimate.

What does this mean?

Tech Notes for B1835 2015 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 B1835 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code B1835 in a 2015 GMC Sierra related to the Driver Seat Lumbar Rearward Switch Circuit?

The common symptoms include a non-functioning driver seat lumbar rearward switch, the inability to adjust the lumbar support in the rearward direction, and potential illumination of the airbag warning light.

2. What typically causes the OBDII code B1835 to trigger in a 2015 GMC Sierra?

The code B1835 is usually triggered by a malfunction in the driver seat lumbar rearward switch circuit, which can be caused by wiring issues, a faulty switch, or a problem with the seat control module.

3. How can I diagnose the OBDII code B1835 in my 2015 GMC Sierra?

To diagnose the B1835 code, you can use a diagnostic scanner to retrieve the specific fault codes, inspect the wiring and connections related to the driver seat lumbar rearward switch, and test the switch itself for proper functionality.

4. Is it safe to continue driving my 2015 GMC Sierra with the OBDII code B1835 present?

It is generally safe to continue driving the vehicle with the B1835 code, but it is recommended to address the issue promptly to ensure proper operation of the driver seat lumbar support and to prevent any potential safety concerns.

5. Can I repair the OBDII code B1835 in my 2015 GMC Sierra myself?

Depending on your level of automotive expertise, you may be able to repair the B1835 code yourself by inspecting and repairing any damaged wiring, replacing the faulty switch, or resetting the seat control module. Otherwise, seeking professional help is advisable.

6. Are there any quick tips for fixing the OBDII code B1835 in a 2015 GMC Sierra?

Quick tips for fixing the B1835 code include checking for loose or damaged wiring connections, ensuring the switch is securely connected, and resetting the seat control module by disconnecting the battery for a few minutes.

7. Will resetting the OBDII code B1835 in my 2015 GMC Sierra make it go away permanently?

Resetting the B1835 code may temporarily clear the fault code, but if the underlying issue with the driver seat lumbar rearward switch circuit is not addressed, the code is likely to reappear. It's essential to diagnose and fix the root cause of the problem.

8. How much does it typically cost to repair the OBDII code B1835 in a 2015 GMC Sierra at a dealership or repair shop?

The cost of repairing the B1835 code can vary depending on the cause of the issue and labor rates in your area. It's recommended to obtain quotes from different dealerships or repair shops to get an accurate estimate.

9. Can a faulty driver seat lumbar rearward switch affect other components in my 2015 GMC Sierra?

While the primary impact of a faulty lumbar rearward switch is related to the driver seat adjustment, it may also affect other electronic components in the seat control system or potentially trigger related fault codes. Regular maintenance and prompt repairs are recommended.

10. Is the OBDII code B1835 common in 2015 GMC Sierra vehicles, or is it a rare issue?

The B1835 code related to the driver seat lumbar rearward switch circuit is not uncommon in 2015 GMC Sierra vehicles, especially as they age and experience wear and tear on electrical components. Regular inspections and maintenance can help prevent such issues.

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