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Engine-Codes – GMC – B316B 2018 GMC Sierra

B316B 2018 GMC Sierra Code - Driver Window Switch

Quick Answer

The B316B diagnostic trouble code (DTC) specifically relates to the driver window switch in a 2018 GMC Sierra. Common causes include Faulty driver window switch, Wiring issues or loose connections in the electrical circuit, Malfunctioning 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
B316B 2018 GMC Sierra indicates Driver Window Switch.
Common causes
Common causes include Faulty driver window switch, Wiring issues or loose connections in the electrical circuit, Malfunctioning 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code B316B 2018 GMC Sierra Description

The B316B diagnostic trouble code (DTC) specifically relates to the driver window switch in a 2018 GMC Sierra. This code indicates a fault or malfunction in the driver's side window switch, which is responsible for controlling the movement of the driver's side window. The driver window switch is an essential component that allows the driver to open or close the window with ease. When this switch malfunctions, it can lead to issues with the window's operation, affecting the overall convenience and functionality of the vehicle.

OBDII Code B316B 2018 GMC Sierra - Driver Window Switch
B316B 2018 GMC Sierra Code - Driver Window Switch

Common Causes of B316B 2018 GMC Sierra

  1. Faulty driver window switch.
  2. Wiring issues or loose connections in the electrical circuit.
  3. Malfunctioning control module.
  4. Water damage or corrosion in the switch or wiring.
  5. Wear and tear from regular use over time.

Symptoms of B316B 2018 GMC Sierra

  1. Inability to open or close the driver's side window using the switch.
  2. Intermittent operation of the driver's side window.
  3. Unresponsive or erratic behavior from the driver window switch.
  4. Illumination of the window switch control lights when the window is not in operation.
  5. Strange noises coming from the door panel when attempting to operate the window.

How to Fix B316B 2018 GMC Sierra

  1. Begin by diagnosing the specific cause of the issue using a diagnostic scanner to retrieve the trouble code.
  2. Inspect the wiring and connections related to the driver window switch for any signs of damage or corrosion.
  3. Test the functionality of the switch itself to determine if it is faulty and needs replacement.
  4. If the switch is confirmed to be the issue, replace it with a new one and ensure proper installation.
  5. Clear the trouble code from the vehicle's system and test the window operation to confirm that the issue has been resolved.

Cost to Fix B316B 2018 GMC Sierra

The typical repair costs for addressing the B316B code related to the driver window switch in a 2018 GMC Sierra can range from $150 to $300, including parts and labor. However, it's important to note that the actual cost may vary depending on the specific diagnosis time and labor rates at auto repair shops. Rates can be influenced by factors such as location, vehicle make and model, and engine type. It is recommended to inquire with local auto repair shops for a more accurate estimate based on individual circumstances.

What does this mean?

Tech Notes for B316B 2018 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 B316B 2018 GMC Sierra Code

1. What does OBDII code B316B mean on a 2018 GMC Sierra?

Code B316B refers to a fault related to the driver window switch circuit, indicating a malfunction or communication issue within the switch or its wiring.

2. What are the symptoms of code B316B in a 2018 GMC Sierra?

Common symptoms include the driver-side window not responding to switch inputs, erratic window operation, or no power window functionality at all.

3. What causes code B316B to appear on a 2018 GMC Sierra?

Potential causes include a faulty driver window switch, damaged wiring or connectors in the switch circuit, or a problem with the Body Control Module (BCM).

4. Can a blown fuse cause code B316B in my GMC Sierra?

Yes, a blown fuse related to the power window circuit can interrupt functionality and trigger this code. Check the fuse box for any blown fuses.

5. How do I fix the B316B code on my 2018 GMC Sierra?

Inspect the driver window switch for damage, check wiring and connections for corrosion or breaks, and replace the switch if necessary. If the issue persists, consult a mechanic to diagnose the BCM.

6. Can I still operate my 2018 GMC Sierra if code B316B is present?

Yes, the vehicle is drivable, but the driver-side window may not function properly, which can be inconvenient and affect ventilation or visibility.

7. How much does it cost to repair code B316B on a 2018 GMC Sierra?

The cost depends on the root cause. Replacing a driver window switch may cost $50–$150 for parts, plus labor. Wiring or BCM repairs can be more expensive.

8. Do I need to reprogram anything after fixing code B316B on a GMC Sierra?

If the Body Control Module (BCM) is replaced or reprogrammed, it may require professional calibration. Replacing just the switch usually doesn’t need reprogramming.

9. Can code B316B cause other electrical issues in my GMC Sierra?

Although unlikely, unresolved wiring or BCM problems could potentially interfere with other systems connected to the Body Control Module.

10. How do I prevent code B316B from recurring on my GMC Sierra?

Regularly inspect and clean the driver window switch, avoid exposing it to excessive moisture, and ensure the wiring and connectors are secure and free of damage.

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