B1055 2016 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 2016 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 2016 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 2016 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 2016 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 2016 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 2016 GMC Sierra Code
1. What does the OBDII code B1055 mean on a 2016 GMC Sierra?
B1055 refers to a fault in the Right Rear Door Audio Output 4 Circuit, indicating an issue with the audio signal to the right rear door speaker.
2. What are the common symptoms of code B1055 on a 2016 GMC Sierra?
Symptoms include no sound or distorted audio from the right rear door speaker.
3. What causes the B1055 code on a 2016 GMC Sierra?
Common causes are a faulty speaker, damaged wiring, loose connectors, or a malfunctioning amplifier.
4. Can a blown speaker trigger the B1055 code?
Yes, a blown or faulty speaker in the right rear door can disrupt the circuit and trigger this code.
5. How can I diagnose the B1055 code on my GMC Sierra?
Inspect the wiring and connections to the right rear door speaker, test the speaker for continuity, and check the audio amplifier for functionality.
6. Is the B1055 code serious?
It’s not critical for vehicle operation but affects audio system functionality and should be addressed to restore proper sound.
7. Can I fix the B1055 code myself?
If you’re comfortable with basic electrical repairs, you can check and replace the speaker or repair damaged wiring. Otherwise, consult a professional.
8. How much does it cost to repair the B1055 code on a 2016 GMC Sierra?
Repair costs vary but typically range from $50 to $150 for a replacement speaker or wiring repair. Amplifier replacement may cost significantly more.
9. Can a software issue cause the B1055 code?
While rare, a software glitch in the audio system or amplifier could potentially cause this code.
10. Will clearing the B1055 code fix the issue?
Clearing the code without repairing the underlying issue will not fix the problem. The code will likely return.
Discuss the causes and fixes for B1055 2016 GMC Sierra OBDII Code
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