B1745 2018 GMC Sierra Code - Driver Seat Rear Up Switch Circuit
Quick Answer
The B1745 diagnostic trouble code (DTC) for the 2018 GMC Sierra specifically relates to the Driver Seat Rear Up Switch Circuit. Common causes include Faulty driver seat rear up switch, Wiring issues or loose connections in the circuit, Failed seat adjustment 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
- B1745 2018 GMC Sierra indicates Driver Seat Rear Up Switch Circuit.
- Common causes
- Common causes include Faulty driver seat rear up switch, Wiring issues or loose connections in the circuit, Failed seat adjustment 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.
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Code B1745 2018 GMC Sierra Description
The B1745 diagnostic trouble code (DTC) for the 2018 GMC Sierra specifically relates to the Driver Seat Rear Up Switch Circuit. This code indicates that there is a malfunction in the circuit that controls the rear up movement of the driver's seat. The driver's seat in modern vehicles is equipped with various electronic components that enable adjustments for comfort and convenience. When this circuit fails, it can affect the ability to adjust the driver's seat, leading to discomfort and potential safety issues.
Common Causes of B1745 2018 GMC Sierra
- Faulty driver seat rear up switch.
- Wiring issues or loose connections in the circuit.
- Failed seat adjustment motor.
- Electronic control module (ECM) malfunction.
- Water or moisture damage to the seat adjustment system components.
Symptoms of B1745 2018 GMC Sierra
- Inability to adjust the driver's seat in the upward direction.
- Unresponsive rear up switch on the driver's seat.
- Seat adjustment motor making unusual noises when trying to move the seat up.
- Seat position feeling uncomfortable or awkward while driving.
- Warning light illuminated on the dashboard related to the seat adjustment system.
How to Fix B1745 2018 GMC Sierra
- Diagnose the issue by using a scan tool to retrieve the DTC and inspecting the driver seat rear up switch and circuit.
- Check the wiring and connections for any damage or loose connections. Repair or replace as necessary.
- Test the seat adjustment motor functionality and replace if found to be faulty.
- Reset the ECM and clear the DTC from the system memory.
- Conduct a final test to ensure the driver's seat can be adjusted in all directions smoothly.
Cost to Fix B1745 2018 GMC Sierra
The typical repair costs for addressing the B1745 code on a 2018 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a faulty driver seat rear up switch or repairing wiring and connections may cost between $100 to $300. If the seat adjustment motor needs to be replaced, the cost can range from $200 to $500, including parts and labor.
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Frequently Asked Questions about B1745 2018 GMC Sierra Code
1. What does the OBDII code B1745 mean on a 2018 GMC Sierra?
It indicates an issue with the Driver Seat Rear Up Switch Circuit, which controls the rear height adjustment of the driver’s seat.
2. What are the common symptoms of the B1745 code?
Symptoms include the driver’s seat not adjusting properly, particularly in the rear height position, or no response when the switch is activated.
3. What causes the B1745 code to appear?
Common causes include a faulty seat adjustment switch, damaged wiring or connectors in the circuit, or a malfunctioning seat motor.
4. How can I diagnose the B1745 code on my GMC Sierra?
Start by visually inspecting the seat switch, wiring, and connectors for damage. Use a multimeter to check for proper voltage and continuity in the circuit.
5. Can a blown fuse cause the B1745 code to trigger?
Yes, a blown fuse in the seat adjustment circuit can cause this code. Check the fuse box for any blown fuses related to seat functions.
6. Is the driver seat motor a potential cause for the B1745 code?
Yes, a faulty or jammed seat motor that controls the rear height adjustment can trigger this code.
7. How do I fix the B1745 code on a 2018 GMC Sierra?
Repairs may involve replacing the faulty seat adjustment switch, repairing damaged wiring, or replacing the seat motor if it’s defective.
8. Can I continue driving with the B1745 code active?
Yes, you can still drive the vehicle, but the seat adjustment functionality may be limited, which could affect comfort.
9. How much does it cost to repair the B1745 code issue?
Costs vary depending on the exact problem, but replacing a seat switch generally costs $100–$200, while motor replacement can be $200–$500.
10. Do I need to clear the B1745 code after repairs?
Yes, after completing the repairs, use an OBDII scanner to clear the code and verify that it does not return.
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