B1835 2018 GMC Sierra Code - Driver Seat Lumbar Rearward Switch Circuit
Quick Answer
The B1835 diagnostic trouble code (DTC) on a 2018 GMC Sierra relates to an issue with the driver seat lumbar rearward switch circuit. Common causes include Faulty lumbar support switch, Damaged wiring or connectors in the circuit, Blown fuse related to the driver seat lumbar support. 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 2018 GMC Sierra indicates Driver Seat Lumbar Rearward Switch Circuit.
- Common causes
- Common causes include Faulty lumbar support switch, Damaged wiring or connectors in the circuit, Blown fuse related to the driver seat lumbar support.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code B1835 2018 GMC Sierra Description
The B1835 diagnostic trouble code (DTC) on a 2018 GMC Sierra relates to an issue with the driver seat lumbar rearward switch circuit. This code indicates a problem with the electrical circuit that controls the lumbar support adjustment in the driver's seat. The lumbar support feature is designed to provide additional lower back comfort and support to the driver, and when this circuit malfunctions, it can result in the inability to adjust the lumbar support in the desired direction.
Common Causes of B1835 2018 GMC Sierra
- Faulty lumbar support switch.
- Damaged wiring or connectors in the circuit.
- Blown fuse related to the driver seat lumbar support.
- Issues with the seat control module.
- Wear and tear from constant use of the lumbar support feature.
Symptoms of B1835 2018 GMC Sierra
- Inability to adjust the lumbar support in the rearward direction.
- Malfunctioning or unresponsive lumbar support switch.
- Illumination of the airbag warning light on the dashboard.
- Intermittent loss of power to the driver's seat controls.
- Strange noises or vibrations when attempting to adjust the lumbar support.
How to Fix B1835 2018 GMC Sierra
- Start by inspecting the lumbar support switch and wiring for any visible damage or loose connections.
- Test the circuit using a multimeter to determine if there is a loss of continuity or a short circuit.
- Replace any faulty components such as the switch, wiring, or fuse as needed.
- Reset the seat control module to ensure proper communication with the circuit.
- Test the lumbar support feature to confirm that the issue has been resolved.
Cost to Fix B1835 2018 GMC Sierra
The typical repair costs for addressing a B1835 DTC related to the driver seat lumbar rearward switch circuit on a 2018 GMC Sierra can vary depending on the extent of the issue and the specific components that require replacement. On average, the parts and labor for this repair may range from $150 to $400. However, it's essential to note that actual costs can differ based on factors such as location, dealership or independent shop rates, and the availability of parts. To get an accurate estimate, it's recommended to consult with a qualified automotive technician or repair shop in your area.
Need more information about the B1835 2018 GMC Sierra code?
Need more information on how to fix the B1835 2018 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B1835 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B1835 2018 GMC Sierra Code
1. What does the OBDII code B1835 mean on a 2018 GMC Sierra?
B1835 indicates an issue with the driver seat lumbar rearward switch circuit, which controls the lumbar support adjustment in the seat.
2. What are the common symptoms of code B1835 in a 2018 GMC Sierra?
Common symptoms include the lumbar support not moving rearward when the switch is pressed, or the lumbar adjustment feature being completely unresponsive.
3. What causes the B1835 code to appear in a GMC Sierra?
Possible causes include a faulty lumbar switch, damaged wiring or connections in the switch circuit, or a malfunctioning seat control module.
4. How can I diagnose the B1835 code on my GMC Sierra?
Start by inspecting the lumbar switch for physical damage, checking the wiring and connectors for signs of wear or corrosion, and using a scan tool to monitor the seat control module's behavior.
5. Can I still drive my GMC Sierra with code B1835 active?
Yes, the code does not affect the drivability of the vehicle, but you may lose lumbar adjustment functionality in the driver’s seat.
6. How do I fix code B1835 on a 2018 GMC Sierra?
Repairs may involve replacing a damaged lumbar switch, repairing or replacing faulty wiring, or reprogramming or replacing the seat control module.
7. How much does it cost to repair code B1835 in a GMC Sierra?
Repair costs can vary, but replacing a lumbar switch may cost $50–$150 for parts, plus labor. Wiring repairs or module replacement could be more expensive.
8. Can a blown fuse cause the B1835 code?
While unlikely, a blown fuse in the seat adjustment circuit could contribute to the issue. Checking the fuses is a simple first step in troubleshooting.
9. Do I need specialized tools to fix the B1835 code?
Basic tools for inspecting wiring and connectors, along with an OBDII scanner for diagnostics, are typically sufficient. Advanced troubleshooting may require a multimeter and access to GMC-specific repair manuals.
10. Will clearing the code fix the B1835 issue?
Clearing the code with a scan tool will not fix the underlying problem. The code will likely return if the root cause is not addressed.
Discuss the causes and fixes for B1835 2018 GMC Sierra OBDII Code
Code B1835 2018 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.