B1055 2014 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 2014 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.
Code B1055 2014 GMC Sierra Description
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.
What are the Possible Causes of the DTC B1055 2014 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 2014 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.
Code Tech Notes
B1055:02 Right Rear Door Audio Output 4 Circuit Short to Ground
B1055:04 Right Rear Door Audio Output 4 Circuit Open
User Submitted Video
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1055 2014 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.
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Frequently Asked Questions about B1055 2014 GMC Sierra Code
1. What does the OBDII code B1055 mean on a 2014 GMC Sierra?
Code B1055 indicates an issue with the Right Rear Door Audio Output 4 Circuit, which is part of the vehicle's audio system.
2. What are common symptoms of the B1055 code?
Symptoms include no sound or distorted audio from the right rear speaker and potential audio system malfunctions.
3. What causes the B1055 code to appear?
Common causes include a faulty speaker, broken or damaged wiring, a loose connector, or an issue with the radio or amplifier.
4. Can the B1055 code affect other vehicle systems?
Generally, this code only impacts the audio system and does not affect critical vehicle functions.
5. How can I diagnose the B1055 code in my GMC Sierra?
Start by inspecting the right rear speaker, checking for damaged wiring, ensuring connectors are secure, and testing the speaker for proper function.
6. Can I drive my 2014 GMC Sierra with the B1055 code active?
Yes, you can drive the vehicle, but the audio quality or speaker functionality may be impaired.
7. How do I repair the B1055 code in a 2014 GMC Sierra?
Repairs may include replacing a faulty speaker, repairing damaged wiring, reseating loose connectors, or diagnosing and repairing the radio or amplifier.
8. How much does it cost to fix the B1055 code?
Repair costs vary depending on the issue. Replacing a speaker might cost $50-$200, while diagnosing and repairing the radio or amplifier could cost more.
9. Can I fix the B1055 code myself?
If you are comfortable inspecting wiring, checking connectors, and testing speakers, you may be able to address the issue yourself. Otherwise, professional assistance is recommended.
10. Will resetting the code fix the B1055 issue?
Resetting the code without addressing the underlying problem will not fix the issue. The code will likely return until the root cause is resolved.
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