AutoCodes – GMC – B3101 2015 GMC Sierra

B3101 2015 GMC Sierra Code - Keyless Entry Data Link Circuit

Quick Answer

The Body Control Module (BCM) communicates with the Remote Control Door Lock Receiver (RCDLR) through the keyless entry serial data circuits. Common causes include Faulty Remote Control Door Lock Receiver (RCDLR), Remote Control Door Lock Receiver harness is open or shorted, Remote Control Door Lock Receiver circuit poor electrical connection. 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: B3101 2015 GMC Sierra indicates Keyless Entry Data Link Circuit.
Common causes: Common causes include Faulty Remote Control Door Lock Receiver (RCDLR), Remote Control Door Lock Receiver harness is open or shorted, Remote Control Door Lock Receiver circuit poor electrical connection.
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 296

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 B3101 2015 GMC Sierra Description

The Body Control Module (BCM) communicates with the Remote Control Door Lock Receiver (RCDLR) through the keyless entry serial data circuits. When any button on the keyless entry transmitter is pressed, the transmitter sends a signal to the RCDLR. The RCDLR sends a function request to the BCM, depending on which button is pressed on the transmitter. The body control module receives the message and performs the appropriate function. The Diagnostic Trouble Code (DTC) sets when o response is received from the RCDLR after the BCM requests information from or sends configuration commands to the RCDLR.

OBDII Code B3101 2015 GMC Sierra - Keyless Entry Data Link Circuit - AutoCodes.com — B3101 2015 GMC Sierra Code - Keyless Entry Data Link Circuit

What does this mean?

What are the Possible Causes of the DTC B3101 2015 GMC Sierra?

Faulty Remote Control Door Lock Receiver (RCDLR)
Remote Control Door Lock Receiver harness is open or shorted
Remote Control Door Lock Receiver circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3101 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 B3101 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 B3101 2015 GMC Sierra code?

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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 B3101 2015 GMC Sierra Code

1. What does OBDII code B3101 mean on a 2015 GMC Sierra?

Code B3101 indicates an issue with the Keyless Entry Data Link Circuit, which can affect the vehicle's keyless entry system.

2. What are common symptoms of code B3101 in a 2015 GMC Sierra?

Symptoms may include the keyless entry system not working, inability to lock or unlock doors remotely, or intermittent functionality.

3. What causes code B3101 on a 2015 GMC Sierra?

Common causes include a faulty keyless entry module, damaged wiring or connectors in the data link circuit, or a malfunctioning key fob.

4. Can a weak key fob battery trigger code B3101?

Yes, a weak or dead key fob battery can sometimes cause communication issues, leading to this code.

5. How do you diagnose code B3101 on a 2015 GMC Sierra?

Diagnosis involves checking the keyless entry module, inspecting the wiring and connectors for damage, and testing the key fob for proper operation.

6. Is code B3101 related to the vehicle not starting?

Not directly, but if the keyless entry system is tied to the ignition system, the vehicle may not recognize the key fob, potentially preventing it from starting.

7. Can a software update fix code B3101 on a 2015 GMC Sierra?

In some cases, reprogramming or updating the Body Control Module (BCM) software may resolve the issue if itâ€™s due to a glitch.

8. What tools are needed to diagnose and repair code B3101?

A diagnostic scan tool capable of reading body control module codes, a multimeter for checking circuits, and possibly a key fob tester are needed.

9. How much does it cost to fix code B3101 on a 2015 GMC Sierra?

Repair costs vary depending on the issue, but replacing a keyless entry module can cost $200â€“$500, while simpler fixes like repairing a wire or replacing a key fob battery are much cheaper.

10. Can I clear code B3101 without repairing the issue?

You can clear the code temporarily with a scan tool, but if the underlying issue isnâ€™t fixed, the code will likely return.