B1835 2018 GMC Sierra Code - Driver Seat Lumbar Rearward 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
- B1835 2018 GMC Sierra indicates Driver Seat Lumbar Rearward 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.
Code B1835 2018 GMC Sierra Description
What are the Possible Causes of the DTC B1835 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 B1835 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 is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1835 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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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.
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