B1835 2016 GMC Sierra Code - Driver Seat Lumbar Rearward Switch Circuit
Quick Answer
The B1835 diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the driver seat lumbar rearward switch circuit. Common causes include Defective lumbar support switch, Damaged wiring or connectors in the circuit, Poor electrical connections in the 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
- B1835 2016 GMC Sierra indicates Driver Seat Lumbar Rearward Switch Circuit.
- Common causes
- Common causes include Defective lumbar support switch, Damaged wiring or connectors in the circuit, Poor electrical connections in the 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.
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Code B1835 2016 GMC Sierra Description
The B1835 diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the driver seat lumbar rearward switch circuit. This code indicates that there is a malfunction in the electrical circuit controlling the lumbar support adjustment feature of the driver's seat in the vehicle. Specifically, it points to an issue with the switch that controls the lumbar support moving the seat backward.
Common Causes of B1835 2016 GMC Sierra
- Defective lumbar support switch.
- Damaged wiring or connectors in the circuit.
- Poor electrical connections in the seat control module.
- Faulty seat control module.
- Water or moisture intrusion causing corrosion in the electrical components.
Symptoms of B1835 2016 GMC Sierra
- Inability to adjust the lumbar support in the driver's seat.
- The lumbar support moves in the wrong direction when the switch is activated.
- Intermittent functioning of the lumbar support feature.
- Illumination of the airbag warning light on the dashboard.
How to Fix B1835 2016 GMC Sierra
- Begin by diagnosing the exact cause of the issue using a scan tool to retrieve the DTC and inspect the lumbar support switch, wiring, connectors, and control module.
- If the problem lies with the lumbar support switch, replace it with a new one.
- Check for any damaged wiring or connectors and repair or replace them as needed.
- Test the electrical connections in the seat control module and replace the module if it is faulty.
- Clear the DTC from the vehicle's computer memory and perform a test drive to ensure the lumbar support adjustment is functioning correctly.
Cost to Fix B1835 2016 GMC Sierra
The cost of repairing the driver seat lumbar rearward switch circuit can vary depending on the specific cause of the issue and the labor rates in your area. On average, the parts for this repair may range from $50 to $200, while the labor cost could be between $100 and $300. Keep in mind that these are rough estimates, and actual costs may differ based on the shop you choose and any additional services required. It's recommended to obtain quotes from multiple auto repair shops to compare prices and ensure a fair deal.
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Frequently Asked Questions about B1835 2016 GMC Sierra Code
1. What does OBDII code B1835 mean on a 2016 GMC Sierra?
Code B1835 indicates a problem with the Driver Seat Lumbar Rearward Switch Circuit, which controls the rearward adjustment of the lumbar support in the driver’s seat.
2. What are the symptoms of code B1835 on a 2016 GMC Sierra?
Common symptoms include the lumbar support not moving rearward when the switch is pressed and possibly no response from the switch at all.
3. What causes the B1835 code to appear in a 2016 GMC Sierra?
This code can be triggered by a faulty lumbar switch, damaged wiring or connectors in the circuit, or a malfunctioning seat control module.
4. How do I diagnose the B1835 code on a 2016 GMC Sierra?
Start by inspecting the lumbar rearward switch, checking for loose or damaged wiring, and testing the switch and related circuit for proper voltage and continuity.
5. Can I still drive my 2016 GMC Sierra with a B1835 code?
Yes, the vehicle is safe to drive, but the lumbar support feature may not work properly, affecting seat comfort.
6. How can I fix the B1835 code on my 2016 GMC Sierra?
Repairs may include replacing the lumbar switch, repairing damaged wiring or connectors, or reprogramming or replacing the seat control module if necessary.
7. What tools are needed to fix the B1835 code on a 2016 GMC Sierra?
You’ll typically need a multimeter for electrical testing, a scan tool capable of reading body control module codes, and basic hand tools for seat disassembly if required.
8. Is the B1835 code covered under warranty for a 2016 GMC Sierra?
It depends on your vehicle’s warranty terms and coverage. Check with your GMC dealership to determine if seat-related electrical issues are included.
9. How much does it cost to repair the B1835 code on a 2016 GMC Sierra?
Repair costs vary depending on the specific issue, but replacing a lumbar switch typically costs $50–$150 for parts and labor, while wiring repairs or module replacement may cost more.
10. Can I reset the B1835 code without fixing the issue on my 2016 GMC Sierra?
While you can clear the code using a scan tool, it will likely return if the underlying issue isn’t resolved.
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