B1035 2018 GMC Sierra Code - Right Front Door Audio Output 2 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 Front 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
- B1035 2018 GMC Sierra indicates Right Front Door Audio Output 2 Circuit.
- Common causes
- Common causes include Faulty Radio Unit, Faulty Audio Amplifier (If equipped), Faulty Right Front 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 B1035 2018 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 B1035 2018 GMC Sierra?
- Faulty Radio Unit
- Faulty Audio Amplifier (If equipped)
- Faulty Right Front Door Speaker
- Right Front Door Speaker harness is open or shorted
- Right Front Door Speaker circuit poor electrical connection
How to Fix the DTC B1035 2018 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
B1035:02 Right Front Door Audio Output 2 Circuit Short to Ground
B1035:04 Right Front Door Audio Output 2 Circuit Open
User Submitted Video
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1035 2018 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 B1035 2018 GMC Sierra Code
1. What does OBDII code B1035 mean on a 2018 GMC Sierra?
Code B1035 indicates a fault in the Right Front Door Audio Output 2 Circuit, which usually involves a problem with the audio signal or wiring to the right front door speaker.
2. What are common symptoms of code B1035 in a 2018 GMC Sierra?
Symptoms may include no sound from the right front door speaker, distorted audio, or intermittent speaker operation.
3. What causes the B1035 code to appear?
This code is typically caused by a faulty speaker, damaged wiring, a loose connector, or an issue with the amplifier or head unit.
4. Can I still drive my GMC Sierra with code B1035?
Yes, code B1035 doesn’t affect the drivability of your vehicle, but it may impact the audio system's performance.
5. How do I diagnose a B1035 code in a 2018 GMC Sierra?
Start by inspecting the speaker wiring and connectors for damage or corrosion. You may also need to test the speaker and check for proper signal output from the amplifier or head unit.
6. How do I fix the B1035 code in my GMC Sierra?
Repairs may involve replacing the right front speaker, repairing or replacing damaged wiring, or addressing faults in the amplifier or head unit.
7. Is it expensive to repair a B1035 code in a 2018 GMC Sierra?
Repair costs vary depending on the issue. Replacing a speaker or repairing wiring is typically less expensive than replacing an amplifier or head unit.
8. Can a software update fix the B1035 code?
In rare cases, a software update for the audio system may resolve the issue, but hardware problems are more common.
9. Will disconnecting the battery clear the B1035 code?
Disconnecting the battery may temporarily clear the code, but it won’t fix the underlying issue causing the fault.
10. Should I take my vehicle to a professional for a B1035 code?
If you’re unable to diagnose or repair the issue yourself, it’s best to consult a professional technician for a thorough inspection and repair.
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