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B3110 2018 GMC Sierra Code - Keyless Entry Transmitter 2 Battery

Quick Answer

The B3110 code for a 2018 GMC Sierra specifically refers to an issue with the Keyless Entry Transmitter 2 Battery. Common causes include Dead or weak battery in the Keyless Entry Transmitter 2, Corrosion on the battery terminals, Physical damage to the key fob. 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 Dead or weak battery in the Keyless Entry Transmitter 2, Corrosion on the battery terminals, Physical damage to the key fob.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code B3110 2018 GMC Sierra Description

The B3110 code for a 2018 GMC Sierra specifically refers to an issue with the Keyless Entry Transmitter 2 Battery. Keyless entry systems have become a common feature in modern vehicles, allowing drivers to unlock and start their cars without needing to physically use a key. In this case, the Keyless Entry Transmitter 2 Battery is responsible for providing power to the key fob that controls the keyless entry system.

OBDII Code B3110 2018 GMC Sierra - Keyless Entry Transmitter 2 Battery
B3110 2018 GMC Sierra Code - Keyless Entry Transmitter 2 Battery

Common Causes of B3110 2018 GMC Sierra

  1. Dead or weak battery in the Keyless Entry Transmitter 2.
  2. Corrosion on the battery terminals.
  3. Physical damage to the key fob.
  4. Electrical issues in the keyless entry system.

Symptoms of B3110 2018 GMC Sierra

  1. Key fob not unlocking or locking the vehicle.
  2. Key fob not starting the vehicle.
  3. Intermittent issues with keyless entry system.
  4. Warning light on the dashboard related to keyless entry system.

How to Fix B3110 2018 GMC Sierra

  1. Replace the battery in the Keyless Entry Transmitter 2.
  2. Clean the battery terminals to ensure a good connection.
  3. Inspect the key fob for any physical damage and replace if necessary.
  4. Check and repair any electrical issues in the keyless entry system.
  5. Re-sync the key fob with the vehicle after battery replacement.

Cost to Fix B3110 2018 GMC Sierra

The cost of replacing the Keyless Entry Transmitter 2 Battery can vary depending on the make and model of the vehicle, as well as the specific key fob used. Generally, the cost of a new battery for the key fob is relatively low, ranging from $5 to $20. If the key fob itself needs to be replaced, this can cost anywhere from $50 to $200, including programming. Labor costs for this repair can range from $50 to $150, depending on the shop's hourly rate. Overall, the total cost for this repair is typically in the range of $100 to $300.

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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 there’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 doesn’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 doesn’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 isn’t functioning properly.

9. What should I do if the new battery doesn’t fix the B3110 code?

If replacing the battery doesn’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.

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