AutoCodes – GMC – B3110 2018 GMC Sierra

B3110 2018 GMC Sierra Code - Keyless Entry Transmitter 2 Battery

Quick Answer

With each press of a keyless entry transmitter button, a message containing the current battery state of the transmitter is sent to the Remote Control Door Lock Receiver (RCDLR), along with the commanded keyless entry function. Common causes include Low Keyless Entry Transmitter Battery, Faulty Keyless Entry Transmitter. 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: B3110 2018 GMC Sierra indicates Keyless Entry Transmitter 2 Battery.
Common causes: Common causes include Low Keyless Entry Transmitter Battery, Faulty Keyless Entry Transmitter.
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 249

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 B3110 2018 GMC Sierra Description

With each press of a keyless entry transmitter button, a message containing the current battery state of the transmitter is sent to the Remote Control Door Lock Receiver (RCDLR), along with the commanded keyless entry function. The Remote Control Door Lock Receiver sends this to the Body Control Module (BCM) to perform the requested function. The Diagnostic Trouble Code (DTC) sets when three consecutive low-battery signals are received from the same transmitter.

OBDII Code B3110 2018 GMC Sierra - Keyless Entry Transmitter 2 Battery - AutoCodes.com — B3110 2018 GMC Sierra Code - Keyless Entry Transmitter 2 Battery

What does this mean?

What are the Possible Causes of the DTC B3110 2018 GMC Sierra?

Low Keyless Entry Transmitter Battery
Faulty Keyless Entry Transmitter

How to Fix the DTC B3110 2018 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 B3110 2018 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 B3110 2018 GMC Sierra code?

Need more information on how to fix the B3110 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the 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 B3110 2018 GMC Sierra Code

1. What does OBDII code B3110 mean on a 2018 GMC Sierra?

The B3110 code indicates an issue with the Keyless Entry Transmitter 2 battery, typically related to low or depleted power in the second key fob.

2. What are the symptoms of code B3110 in a 2018 GMC Sierra?

Symptoms include difficulty unlocking or locking the vehicle with the second key fob, intermittent operation, or total failure of the keyless entry system for that fob.

3. What causes the B3110 code to appear on my 2018 GMC Sierra?

This code is triggered when the battery in the second keyless entry transmitter (key fob) is low, dead, or thereâ€™s a communication problem between the fob and the vehicle.

4. How do I fix the B3110 code on my GMC Sierra?

Replace the battery in the second key fob with a fresh one, ensuring proper installation, and test the fob to confirm functionality.

5. What type of battery does the GMC Sierra key fob use?

The key fob for a 2018 GMC Sierra typically uses a CR2032 coin-cell battery.

6. How can I clear the B3110 code after replacing the key fob battery?

The code may clear automatically after a successful key fob battery replacement and proper operation. If it doesnâ€™t, use an OBDII scanner to clear it.

7. Can I still drive my 2018 GMC Sierra with a B3110 code?

Yes, the B3110 code doesnâ€™t affect drivability, but it may affect convenience features like locking and unlocking with the second key fob.

8. How do I know which key fob is transmitter 2?

Transmitter 2 is usually the backup or secondary key fob. Check the fobs to identify which one isnâ€™t functioning properly.

9. What should I do if the new battery doesnâ€™t fix the B3110 code?

If replacing the battery doesnâ€™t resolve the issue, inspect the fob for damage, check for software updates, or consult a professional to diagnose possible communication issues.

10. How often should I replace the battery in my GMC Sierra key fob?

Key fob batteries typically last 2-3 years, depending on usage. Replace them as soon as you notice a decrease in range or intermittent functionality.