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Engine-Codes – GMC – B1085 2017 GMC Sierra

B1085 2017 GMC Sierra Code - Left Front Instrument Panel Audio Output 7 Circuit

Quick Answer

The B1085 diagnostic trouble code (DTC) for the 2017 GMC Sierra specifically refers to an issue with the Left Front Instrument Panel Audio Output 7 Circuit. Common causes include Faulty left front speaker, Wiring or connection issues in the audio output circuit, Defective audio amplifier. 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
B1085 2017 GMC Sierra indicates Left Front Instrument Panel Audio Output 7 Circuit.
Common causes
Common causes include Faulty left front speaker, Wiring or connection issues in the audio output circuit, Defective audio amplifier.
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 12, 2024
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Code B1085 2017 GMC Sierra Description

The B1085 diagnostic trouble code (DTC) for the 2017 GMC Sierra specifically refers to an issue with the Left Front Instrument Panel Audio Output 7 Circuit. This code indicates that there is a malfunction in the circuit responsible for transmitting audio signals to the left front speakers located in the instrument panel of the vehicle. The audio output circuit plays a crucial role in delivering sound from the audio system to the speakers, ensuring that occupants can enjoy music, radio, or other audio sources while driving.

OBDII Code B1085 2017 GMC Sierra - Left Front Instrument Panel Audio Output 7 Circuit
B1085 2017 GMC Sierra Code - Left Front Instrument Panel Audio Output 7 Circuit

Common Causes of B1085 2017 GMC Sierra

  1. Faulty left front speaker
  2. Wiring or connection issues in the audio output circuit
  3. Defective audio amplifier
  4. Malfunctioning audio control module
  5. Water damage or corrosion in the audio system components

Symptoms of B1085 2017 GMC Sierra

  1. No sound coming from the left front speakers
  2. Distorted or poor sound quality from the left front speakers
  3. Intermittent audio output from the left front speakers
  4. Audio system cutting in and out unexpectedly
  5. Audio system not responding to volume adjustments

How to Fix B1085 2017 GMC Sierra

  1. Begin by inspecting the left front speaker for any visible damage or signs of malfunction. Replace the speaker if necessary.
  2. Check the wiring and connections in the audio output circuit for any loose connections or damage. Repair or replace any faulty wiring.
  3. Test the audio amplifier and audio control module for proper functionality. Replace any components that are malfunctioning.
  4. Inspect the audio system components for water damage or corrosion. Clean or replace affected parts as needed.
  5. Clear the DTC from the vehicle's onboard diagnostic system using a diagnostic tool to reset the audio system and ensure that the issue has been resolved.

Cost to Fix B1085 2017 GMC Sierra

The typical repair costs for addressing the B1085 DTC in a 2017 GMC Sierra can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts such as a new speaker, wiring, amplifier, or control module can range from $100 to $500 or more. Additionally, labor costs for diagnosing the problem, repairing the audio system components, and resetting the DTC can add another $200 to $500 to the total repair bill.

What does this mean?

Tech Notes for B1085 2017 GMC Sierra

B1085:01 Left Front Instrument Panel Audio Output 7 Circuit Short to Battery

B1085:02 Left Front Instrument Panel Audio Output 7 Circuit Short to Ground

B1085:04 Left Front Instrument Panel Audio Output 7 Circuit Open

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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 B1085 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code B1085 in a 2017 GMC Sierra related to the Left Front Instrument Panel Audio Output 7 Circuit?

- Common symptoms include loss of sound from the left front speakers, distorted audio quality, or complete audio system failure.

2. What are the possible causes of OBDII code B1085 in a 2017 GMC Sierra?

- The code B1085 can be triggered by issues such as a faulty audio amplifier, damaged wiring or connectors, a blown fuse, or a malfunctioning audio control module.

3. How can I diagnose the source of OBDII code B1085 in my 2017 GMC Sierra?

- To diagnose the issue, you may need to inspect the wiring and connectors related to the left front audio output, test the audio amplifier, check for blown fuses, and scan the audio control module for faults.

4. Can I still drive my 2017 GMC Sierra with OBDII code B1085 present?

- It is generally safe to drive the vehicle with this code, but you may experience issues with the audio system. It is recommended to address the problem promptly to avoid further complications.

5. How can I repair OBDII code B1085 in my 2017 GMC Sierra at home?

- Depending on the exact cause, you may be able to repair the issue at home by replacing a blown fuse, repairing damaged wiring, or reconnecting loose connectors. However, more complex issues may require professional assistance.

6. Will resetting the OBDII system clear the B1085 code in my 2017 GMC Sierra?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear once the problem is detected again.

7. Is OBDII code B1085 in a 2017 GMC Sierra a serious problem?

- While this code primarily affects the audio system, it is important to address it to ensure proper functioning of the vehicle's entertainment features and to prevent potential electrical issues in the future.

8. How much does it typically cost to repair OBDII code B1085 in a 2017 GMC Sierra?

- The cost of repairing this code can vary depending on the specific cause of the issue. Simple fixes like replacing a fuse may be relatively inexpensive, while more complex repairs involving components like the audio amplifier can be more costly.

9. Can extreme temperatures or humidity affect the occurrence of OBDII code B1085 in a 2017 GMC Sierra?

- Yes, extreme temperatures or humidity can potentially exacerbate electrical issues in the vehicle, including those related to the audio system that may trigger the B1085 code.

10. How can I prevent OBDII code B1085 from reoccurring in my 2017 GMC Sierra?

- Regularly inspecting and maintaining the audio system components, ensuring proper wiring connections, and addressing any issues promptly can help prevent the reoccurrence of the B1085 code in your vehicle.

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