AutoCodes – GMC – B3105 2015 GMC Sierra

B3105 2015 GMC Sierra Code - Keyless Entry Transmitters

Quick Answer

The Body Control Module (BCM) monitors the number of keyless entry transmitters programmed. Common causes include Faulty Keyless Entry Transmitters, Faulty Body Control Module (BCM). Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B3105 2015 GMC Sierra indicates Keyless Entry Transmitters.
Common causes: Common causes include Faulty Keyless Entry Transmitters, Faulty Body Control Module (BCM).
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 197

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 11, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3105 2015 GMC Sierra Description

The Body Control Module (BCM) monitors the number of keyless entry transmitters programmed. Until at least one transmitter is programmed, the Body Control Module determines a malfunction condition exists. The Diagnostic Trouble Code (DTC) will be set when no keyless entry transmitter is programmed to the Body Control Module.

OBDII Code B3105 2015 GMC Sierra - Keyless Entry Transmitters - AutoCodes.com — B3105 2015 GMC Sierra Code - Keyless Entry Transmitters

What does this mean?

What are the Possible Causes of the DTC B3105 2015 GMC Sierra?

Faulty Keyless Entry Transmitters
Faulty Body Control Module (BCM)

How to Fix the DTC B3105 2015 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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3105 2015 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.

Need more information about the B3105 2015 GMC Sierra code?

Need more information on how to fix the B3105 2015 GMC Sierra code? Get Access to Factory Service Manuals

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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 B3105 2015 GMC Sierra Code

1. What does OBDII code B3105 mean for a 2015 GMC Sierra related to Keyless Entry Transmitters?

This code indicates a fault with the keyless entry transmitters in the vehicle.

2. What are common symptoms of OBDII code B3105 in a 2015 GMC Sierra?

Common symptoms include issues with remote keyless entry functionality, such as the key fob not unlocking or locking the doors.

3. What are possible causes of OBDII code B3105 in a 2015 GMC Sierra?

Possible causes include a malfunctioning key fob, a faulty receiver in the vehicle, or issues with the keyless entry system's wiring.

4. How can I diagnose the problem associated with OBDII code B3105 in a 2015 GMC Sierra?

Diagnosing the issue typically involves checking the key fob battery, testing the key fob signal, inspecting the receiver unit in the vehicle, and ensuring there are no wiring issues.

5. Can I repair OBDII code B3105 in a 2015 GMC Sierra myself?

Depending on the cause of the issue, simple fixes like replacing the key fob battery or reprogramming the key fob may resolve the problem. For more complex issues, it's recommended to consult a professional mechanic.

6. Are there any troubleshooting tips for resolving OBDII code B3105 in a 2015 GMC Sierra?

Try replacing the key fob battery, ensuring the key fob is properly synced with the vehicle, and checking for any visible damage to the key fob or receiver unit.

7. Is it safe to continue driving with OBDII code B3105 present in a 2015 GMC Sierra?

While the vehicle should still be safe to drive with this code, it's important to address the keyless entry transmitter issue to ensure convenience and security features are working properly.

8. How much does it typically cost to repair OBDII code B3105 in a 2015 GMC Sierra?

The cost of repair can vary depending on the cause of the issue. Simple fixes like replacing a key fob battery may be inexpensive, while more complex repairs involving the receiver unit could be more costly.

9. Can extreme weather conditions affect the keyless entry transmitters and trigger OBDII code B3105 in a 2015 GMC Sierra?

Yes, extreme temperatures or moisture exposure can sometimes impact the performance of keyless entry transmitters, leading to potential issues with the system.

10. Are there any preventive maintenance steps to avoid encountering OBDII code B3105 in a 2015 GMC Sierra?

Regularly checking and replacing key fob batteries, keeping the key fob and receiver unit clean, and avoiding physical damage to the key fob can help prevent issues with the keyless entry system.