AutoCodes – GMC – B1055 2017 GMC Sierra

B1055 2017 GMC Sierra Code - Right Rear Door Audio Output 4 Circuit

Quick Answer

Vehicles without Amplifier: Each of the audio output channel circuits (+) and (-), at the radio have a DC bias voltage that is approximately one-half of battery voltage. Common causes include Faulty Radio Unit, Faulty Audio Amplifier (If equipped), Faulty Right Rear Door Speaker. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B1055 2017 GMC Sierra indicates Right Rear Door Audio Output 4 Circuit.
Common causes: Common causes include Faulty Radio Unit, Faulty Audio Amplifier (If equipped), Faulty Right Rear Door Speaker.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 222

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 18, 2024

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code B1055 2017 GMC Sierra Description

Vehicles without Amplifier:
Each of the audio output channel circuits (+) and (-), at the radio have a DC bias voltage that is approximately one-half of battery voltage. When using a DMM, each of the audio output channel circuits will measure approximately 6.5 V DC. The audio being played on the system is produced by a varying AC voltage that is centered around the DC bias voltage on the same circuit. The AC voltage is what causes the speaker cone to move and produce sound. The frequency (Hz) of the AC voltage signal is directly related to the frequency of the input (audio source playing) to the audio system. Both the DC bias voltage and the AC voltage signals are needed for the audio system to properly produce sound.

Vehicles with Amplifier:
The Media Oriented Systems Transport (MOST) is a high-speed multimedia network technology. The serial MOST bus uses a ring topology and synchronous data communication to transmit audio, video, data and control information between any devices attached.
The audio amplifier is a participant on the MOST network. The audio amplifier receives audio input and control information from the MOST bus.
Each of the audio output channel circuits (+) and (−), at the audio amplifier have a DC bias voltage that is approximately one-half of the battery voltage. When using a DMM, each of the audio output channel circuits will measure approximately 6.5V DC. The audio being played on the system is produced by a varying AC voltage that is centered around the DC bias voltage on the same circuit. The AC voltage is what causes the speaker cone to move and produce sound.

OBDII Code B1055 2017 GMC Sierra - Right Rear Door Audio Output 4 Circuit - AutoCodes.com — B1055 2017 GMC Sierra Code - Right Rear Door Audio Output 4 Circuit

What does this mean?

What are the Possible Causes of the DTC B1055 2017 GMC Sierra?

Faulty Radio Unit
Faulty Audio Amplifier (If equipped)
Faulty Right Rear Door Speaker
Right Rear Door Speaker harness is open or shorted
Right Rear Door Speaker circuit poor electrical connection

How to Fix the DTC B1055 2017 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 does this mean?

Code Tech Notes

B1055:01 Right Rear Door Audio Output 4 Circuit Short to Battery
B1055:02 Right Rear Door Audio Output 4 Circuit Short to Ground
B1055:04 Right Rear Door Audio Output 4 Circuit Open

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1055 2017 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.

Need more information about the B1055 2017 GMC Sierra code?

Need more information on how to fix the B1055 2017 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 B1055 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code B1055 in a 2017 GMC Sierra related to the Right Rear Door Audio Output 4 Circuit?

- Common symptoms include no sound from the right rear speakers, distorted audio, or complete audio failure in the right rear door.

2. What are the possible causes of OBDII code B1055 in a 2017 GMC Sierra?

- The code B1055 typically indicates a fault in the wiring, connections, or components related to the audio output circuit in the right rear door of the vehicle.

3. How can I diagnose the issue causing OBDII code B1055 in my 2017 GMC Sierra?

- You can start by checking the wiring harness, connectors, and speakers in the right rear door for any visible damage or loose connections. Using a multimeter to test the continuity of the circuit can also help pinpoint the issue.

4. Can a DIY enthusiast repair OBDII code B1055 in a 2017 GMC Sierra?

- Depending on the extent of the issue, DIY enthusiasts with some knowledge of automotive electrical systems may be able to repair the problem by fixing wiring issues, replacing faulty components, or securing loose connections.

5. Is it necessary to visit a dealership or mechanic for OBDII code B1055 in a 2017 GMC Sierra?

- While some cases may require professional diagnosis and repair, if you have experience working with automotive electronics, you may be able to troubleshoot and fix OBDII code B1055 in your 2017 GMC Sierra on your own.

6. Are there any specific tools required to diagnose OBDII code B1055 in a 2017 GMC Sierra?

- Basic tools such as a multimeter, wire strippers, electrical tape, and a set of screwdrivers are typically sufficient for diagnosing and potentially repairing the issue related to OBDII code B1055.

7. Can weather or environmental factors contribute to triggering OBDII code B1055 in a 2017 GMC Sierra?

- Yes, exposure to moisture, extreme temperatures, or physical damage from debris can potentially affect the wiring and connections in the right rear door, leading to the triggering of OBDII code B1055.

8. Will fixing OBDII code B1055 in a 2017 GMC Sierra require replacing any major components?

- In many cases, the issue causing OBDII code B1055 can be resolved by repairing or replacing damaged wiring, connectors, or speakers in the right rear door, without the need for major component replacement.

9. How important is it to address OBDII code B1055 in a 2017 GMC Sierra promptly?

- It is generally recommended to address OBDII code B1055 promptly to ensure the proper functioning of the audio system in the vehicle and prevent any potential long-term damage to the audio components.

10. Can resetting the OBDII system eliminate code B1055 in a 2017 GMC Sierra?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing code B1055 is not addressed, the code is likely to reappear once the system detects the fault again.