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B1045 2014 GMC Sierra Code - Left Rear Door Audio Output 3 Circuit

Quick Answer

The B1045 diagnostic trouble code (DTC) for a 2014 GMC Sierra specifically refers to the Left Rear Door Audio Output 3 Circuit. Common causes include Damaged wiring harness in the left rear door, Loose or corroded connections in the audio output circuit, Faulty left 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
B1045 2014 GMC Sierra indicates Left Rear Door Audio Output 3 Circuit.
Common causes
Common causes include Damaged wiring harness in the left rear door, Loose or corroded connections in the audio output circuit, Faulty left 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code B1045 2014 GMC Sierra Description

The B1045 diagnostic trouble code (DTC) for a 2014 GMC Sierra specifically refers to the Left Rear Door Audio Output 3 Circuit. This code indicates that there is a malfunction in the audio output circuit of the left rear door of the vehicle. In modern vehicles, audio systems are integrated with various components and modules throughout the car, including the doors. Each door typically has its own audio output circuit to deliver sound to speakers located in that specific door.

OBDII Code B1045 2014 GMC Sierra - Left Rear Door Audio Output 3 Circuit
B1045 2014 GMC Sierra Code - Left Rear Door Audio Output 3 Circuit

Common Causes of B1045 2014 GMC Sierra

  1. Damaged wiring harness in the left rear door
  2. Loose or corroded connections in the audio output circuit
  3. Faulty left rear door speaker
  4. Malfunctioning audio amplifier or head unit
  5. Issues with the control module for the audio system

Symptoms of B1045 2014 GMC Sierra

  1. No sound coming from the left rear speakers
  2. Distorted audio from the left rear speakers
  3. Intermittent audio output from the left rear speakers
  4. Audio system not working at all
  5. Error message on the audio display screen

How to Fix B1045 2014 GMC Sierra

  1. Begin by inspecting the wiring harness in the left rear door for any visible damage or wear. Replace any damaged wiring as needed.
  2. Check and secure all connections in the audio output circuit, including connectors and terminals. Clean any corrosion that may be present.
  3. Test the left rear door speaker for proper functionality. Replace the speaker if it is found to be faulty.
  4. Verify the operation of the audio amplifier or head unit. Replace the defective component if necessary.
  5. If all components check out and the issue persists, consider checking the control module for the audio system for any faults.

Cost to Fix B1045 2014 GMC Sierra

The cost of repairing the B1045 code on a 2014 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. Generally, you can expect to pay anywhere from $100 to $500 for parts and labor. Keep in mind that diagnostic time and labor rates at auto repair shops can fluctuate based on location, make and model of the vehicle, and the type of engine. It's recommended to consult with a trusted mechanic or dealership for a more accurate estimate tailored to your situation.

What does this mean?

Tech Notes for B1045 2014 GMC Sierra

B1045:01 Left Rear Door Audio Output 3 Circuit Short to Battery
B1045:02 Left Rear Door Audio Output 3 Circuit Short to Ground
B1045:04 Left Rear Door Audio Output 3 Circuit Open




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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1045 2014 GMC Sierra Code

1. What does the OBDII code B1045 mean on a 2014 GMC Sierra?

B1045 indicates an issue with the Left Rear Door Audio Output 3 Circuit, which affects the audio signal sent to the left rear door speaker.

2. What are the symptoms of code B1045 in a 2014 GMC Sierra?

Symptoms may include no sound or distorted audio from the left rear door speaker, or intermittent speaker function.

3. What causes the B1045 code to appear on a 2014 GMC Sierra?

Common causes include a faulty speaker, damaged wiring or connectors in the left rear door audio circuit, or a malfunctioning radio or audio amplifier.

4. How can I diagnose the B1045 code on my 2014 GMC Sierra?

Start by inspecting the speaker, wiring, and connectors for damage or corrosion. Use a multimeter to test for continuity and proper voltage in the circuit.

5. Can a blown speaker cause the B1045 code in a 2014 GMC Sierra?

Yes, a blown or faulty left rear door speaker can trigger the B1045 code due to an open or shorted circuit.

6. How do you fix the B1045 code on a 2014 GMC Sierra?

Repairs may include replacing the left rear door speaker, repairing or replacing damaged wiring, or reprogramming or replacing the radio or audio amplifier if needed.

7. Is the B1045 code serious in a 2014 GMC Sierra?

While it does not affect vehicle drivability, it can impact audio quality and should be addressed to maintain proper function of the sound system.

8. Can I still drive my 2014 GMC Sierra with a B1045 code?

Yes, you can drive the vehicle, but the left rear door speaker may not function correctly, which could impact your enjoyment of the audio system.

9. How much does it cost to fix the B1045 code on a 2014 GMC Sierra?

Repair costs vary depending on the issue. Replacing a speaker might cost around $50-$200, while wiring repairs or amplifier replacements could be more expensive.

10. Can a software update fix the B1045 code in a 2014 GMC Sierra?

In some cases, reprogramming the audio system or performing a software update may resolve the issue if it’s related to a system glitch.

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