B1065 2016 GMC Sierra Code - Left Rear Door Audio Output 5 Circuit
Quick Answer
The Media Oriented Systems Transport (MOST) is a high-speed multimedia network technology. Common causes include Faulty Audio Amplifier, Faulty Left Rear Door Speaker, Left Rear Door Speaker harness is open or shorted. 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
- B1065 2016 GMC Sierra indicates Left Rear Door Audio Output 5 Circuit.
- Common causes
- Common causes include Faulty Audio Amplifier, Faulty Left Rear Door Speaker, Left Rear Door Speaker harness is open or shorted.
- 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 B1065 2016 GMC Sierra Description
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 B1065 2016 GMC Sierra?
- Faulty Audio Amplifier
- Faulty Left Rear Door Speaker
- Left Rear Door Speaker harness is open or shorted
- Left Rear Door Speaker circuit poor electrical connection
How to Fix the DTC B1065 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
B1065:02 Left Rear Door Audio Output 5 Circuit Short to Ground
B1065:04 Left Rear Door Audio Output 5 Circuit Open
User Submitted Video
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1065 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 B1065 2016 GMC Sierra Code
1. What does OBDII code B1065 mean on a 2016 GMC Sierra?
Code B1065 indicates an issue with the Left Rear Door Audio Output 5 Circuit, which is part of the vehicle's audio system responsible for sending signals to the left rear speaker.
2. What are the symptoms of code B1065 in a 2016 GMC Sierra?
Common symptoms include no sound or distorted audio from the left rear speaker, or the entire audio system may not function properly.
3. What causes code B1065 to appear on a 2016 GMC Sierra?
Possible causes include a faulty left rear speaker, damaged wiring or connectors in the audio circuit, or a malfunctioning radio/amplifier module.
4. Can a blown fuse cause code B1065 in a GMC Sierra?
It’s unlikely, but you should still check for blown fuses in the audio system as part of the diagnostic process to rule out power supply issues.
5. How do you diagnose code B1065 on a 2016 GMC Sierra?
Start by inspecting the left rear speaker, wiring, and connectors for damage or disconnection. If no issues are found, test the audio output signal from the radio or amplifier.
6. Can I still drive my GMC Sierra with code B1065?
Yes, the vehicle is safe to drive, but you may experience audio issues, specifically with the left rear speaker.
7. How do you fix code B1065 on a 2016 GMC Sierra?
Repairs may include replacing the left rear speaker, repairing or replacing damaged wiring, or replacing the radio/amplifier module if it’s determined to be the cause.
8. Is the left rear speaker always the problem with code B1065?
Not always. While the speaker may be faulty, the issue could also lie in the wiring, connectors, or the audio control module.
9. How much does it cost to fix code B1065 on a GMC Sierra?
Repair costs vary depending on the issue. Replacing a speaker may cost $50-$200, while repairing wiring or replacing the radio/amplifier could cost significantly more.
10. Can resetting the code fix the B1065 issue on a 2016 GMC Sierra?
Clearing the code may temporarily reset the system, but the issue will return if the underlying problem is not resolved.
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