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B1745 2016 GMC Sierra Code - Driver Seat Rear Up Switch Circuit

Quick Answer

The B1745 diagnostic trouble code (DTC) for a 2016 GMC Sierra specifically refers to an issue with the driver seat rear up switch circuit. Common causes include Faulty driver seat rear up switch, Wiring or connector issues in the circuit, Blown fuse related to the seat adjustment system. 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 2016 GMC Sierra indicates Driver Seat Rear Up Switch Circuit.
Common causes
Common causes include Faulty driver seat rear up switch, Wiring or connector issues in the circuit, Blown fuse related to the seat adjustment system.
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 14, 2024
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Code B1745 2016 GMC Sierra Description

The B1745 diagnostic trouble code (DTC) for a 2016 GMC Sierra specifically refers to an issue with the driver seat rear up switch circuit. This code indicates that there is a malfunction in the circuit that controls the movement of the driver's seat in the rearward direction. The driver seat rear up switch is responsible for adjusting the seat position to move the rear part of the seat upward. When this circuit is compromised, it can lead to an inability to adjust the seat position as desired, affecting the driver's comfort and potentially compromising safety.

OBDII Code B1745 2016 GMC Sierra - Driver Seat Rear Up Switch Circuit
B1745 2016 GMC Sierra Code - Driver Seat Rear Up Switch Circuit

Common Causes of B1745 2016 GMC Sierra

  1. Faulty driver seat rear up switch.
  2. Wiring or connector issues in the circuit.
  3. Blown fuse related to the seat adjustment system.
  4. Corrosion or damage to electrical connections.
  5. Malfunctioning control module responsible for seat adjustments.

Symptoms of B1745 2016 GMC Sierra

  1. Inability to adjust the driver's seat in the rearward direction.
  2. Unresponsive or erratic movement of the driver seat rear up switch.
  3. Warning light on the dashboard indicating a seat adjustment system fault.
  4. Audible clicking or buzzing noises when attempting to adjust the seat position.

How to Fix B1745 2016 GMC Sierra

  1. Begin by conducting a visual inspection of the wiring, connectors, and switch associated with the driver seat rear up switch circuit to identify any visible damage or corrosion.
  2. Use a multimeter to test the continuity of the circuit and check for any shorts or open circuits that may be causing the issue.
  3. Replace the driver seat rear up switch if it is found to be faulty, ensuring proper installation and connection.
  4. Check and replace any blown fuses related to the seat adjustment system.
  5. If the issue persists, consult a professional mechanic or dealership for further diagnosis and potential replacement of the control module.

Cost to Fix B1745 2016 GMC Sierra

The typical repair costs for addressing the B1745 DTC related to the driver seat rear up switch circuit can vary depending on the specific cause of the issue. In general, the cost of replacing a faulty switch or repairing wiring/connectors can range from $100 to $300, including parts and labor. However, if additional components such as the control module need to be replaced, the cost could increase accordingly. It's important to consider the specific diagnosis time and labor rates at auto repair shops, which can vary based on location and other factors. It's advisable to obtain a detailed estimate from a trusted mechanic or dealership to determine the exact cost of resolving this issue for a 2016 GMC Sierra.

What does this mean?

Tech Notes for B1745 2016 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 B1745 2016 GMC Sierra Code

1. What does OBDII code B1745 mean on a 2016 GMC Sierra?

Code B1745 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 code B1745 in a 2016 GMC Sierra?

Symptoms may include the driver’s seat rear height adjustment not working, limited seat movement, or an illuminated check engine or airbag light.

3. What causes code B1745 to appear in a GMC Sierra?

Common causes include a faulty seat adjustment switch, damaged wiring or connectors, or a malfunctioning seat control module.

4. How can I diagnose code B1745 in my 2016 GMC Sierra?

Start by visually inspecting the seat adjustment switch, wiring, and connectors for damage or corrosion. Use a multimeter to test for continuity and proper voltage in the circuit.

5. Can I still drive my GMC Sierra with code B1745?

Yes, the vehicle is typically still drivable, but the driver’s seat rear height adjustment may not function properly.

6. How do I fix code B1745 on a 2016 GMC Sierra?

Repairs may involve replacing the seat adjustment switch, repairing damaged wiring, or replacing the seat control module if it is faulty.

7. Is code B1745 covered under warranty for a 2016 GMC Sierra?

It depends on your vehicle’s warranty terms. Check with your dealership to see if seat-related electrical issues are covered.

8. How much does it cost to repair code B1745 in a GMC Sierra?

Repair costs can vary, ranging from $50 to $300, depending on whether it’s a simple wiring fix or a replacement of the seat adjustment switch or module.

9. Can a blown fuse cause code B1745 in a 2016 GMC Sierra?

While uncommon, a blown fuse in the seat adjustment circuit could trigger this code. Check the fuse box and replace any blown fuses if necessary.

10. Do I need professional help to fix code B1745 in my GMC Sierra?

If you’re experienced with electrical diagnostics and repairs, you may be able to fix it yourself. Otherwise, it’s best to seek assistance from a qualified mechanic.

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