B1025 2017 GMC Sierra Code - Left Front Door Audio Output 1 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 Left 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
- B1025 2017 GMC Sierra indicates Left Front Door Audio Output 1 Circuit.
- Common causes
- Common causes include Faulty Radio Unit, Faulty Audio Amplifier (If equipped), Faulty Left 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 B1025 2017 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 B1025 2017 GMC Sierra?
- Faulty Radio Unit
- Faulty Audio Amplifier (If equipped)
- Faulty Left Front Door Speaker
- Left Front Door Speaker harness is open or shorted
- Left Front Door Speaker circuit poor electrical connection
How to Fix the DTC B1025 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.
Code Tech Notes
B1025:02 Left Front Door Audio Output 1 Circuit Short to Ground
B1025:04 Left Front Door Audio Output 1 Circuit Open
User Submitted Video
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1025 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.
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Frequently Asked Questions about B1025 2017 GMC Sierra Code
1. What does the OBDII code B1025 mean on a 2017 GMC Sierra?
B1025 indicates an issue with the Left Front Door Audio Output 1 Circuit, which relates to the speaker or wiring in the left front door.
2. What are common symptoms of code B1025 in a 2017 GMC Sierra?
Common symptoms include no sound from the left front door speaker, distorted audio, or intermittent speaker operation.
3. What causes the B1025 code to appear in a 2017 GMC Sierra?
Causes can include a faulty speaker, damaged or corroded wiring, a loose connection, or an issue with the audio amplifier.
4. How do I troubleshoot the B1025 code in my 2017 GMC Sierra?
Begin by inspecting the left front door speaker, checking wiring and connections for damage or corrosion, and testing the audio amplifier for proper function.
5. Can a blown speaker trigger the B1025 code on a 2017 GMC Sierra?
Yes, a blown or faulty left front door speaker can cause the circuit issue and trigger the B1025 code.
6. Is it safe to drive with the B1025 code in a 2017 GMC Sierra?
Yes, it is safe to drive, but you may experience audio issues. It’s best to address the problem to restore proper sound functionality.
7. How much does it cost to fix the B1025 code in a 2017 GMC Sierra?
Repair costs depend on the issue. Replacing a speaker may cost $50-$300, while wiring repairs or amplifier replacement could be more.
8. Can the B1025 code be cleared without fixing the problem?
The code can be cleared temporarily, but it will likely return unless the underlying issue is resolved.
9. Does the B1025 code always mean the speaker is bad?
No, the issue could also lie in the wiring, connectors, or the audio amplifier, not just the speaker.
10. Can I fix the B1025 code on my 2017 GMC Sierra myself?
If you’re comfortable working with car electronics, you can inspect and replace the speaker or repair wiring. For complex issues, professional help may be needed.
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