AutoCodes – GMC – B2476 2018 GMC Sierra

B2476 2018 GMC Sierra Code - Cellular Phone Select Service Switch

Quick Answer

The OnStar® button assembly consists of 3 buttons: Call/Answer, OnStar® Call Center, and OnStar® Emergency. Common causes include Faulty Inside Rearview Mirror, Inside Rearview Mirror harness is open or shorted, Inside Rearview Mirror 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: B2476 2018 GMC Sierra indicates Cellular Phone Select Service Switch.
Common causes: Common causes include Faulty Inside Rearview Mirror, Inside Rearview Mirror harness is open or shorted, Inside Rearview Mirror 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 254

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 May 01, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B2476 2018 GMC Sierra Description

The OnStar® button assembly consists of 3 buttons: Call/Answer, OnStar® Call Center, and OnStar® Emergency. The Telematics Communication Interface Control Module supplies the OnStar® button assembly with 10 V via the 10 V reference circuit. When pressed, each button completes the circuit across a resistor or set of resistors allowing a specific voltage to be returned to the Telematics Communication Interface Control Module over the signal circuit. Depending upon the voltage range returned, the Telematics Communication Interface Control Module is able to identify which button has been pressed. The Diagnostic Trouble Code (DTC) will be set when the Telematics Communication Interface Control Module detects a failure on the 10 V reference circuit.

OBDII Code B2476 2018 GMC Sierra - Cellular Phone Select Service Switch - AutoCodes.com — B2476 2018 GMC Sierra Code - Cellular Phone Select Service Switch

What does this mean?

What are the Possible Causes of the DTC B2476 2018 GMC Sierra?

Faulty Inside Rearview Mirror
Inside Rearview Mirror harness is open or shorted
Inside Rearview Mirror circuit poor electrical connection
Faulty Telematics Communication Interface Control Module

How to Fix the DTC B2476 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 does this mean?

Code Tech Notes

B2476:04 Cellular Phone Select Service Switch Open
B2476:59 Cellular Phone Select Service Switch Protection Time-out

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2476 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 B2476 2018 GMC Sierra code?

Need more information on how to fix the B2476 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2476 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 B2476 2018 GMC Sierra Code

1. What does OBDII code B2476 in a 2018 GMC Sierra mean?

The code B2476 indicates an issue with the Cellular Phone Select Service Switch in the vehicle.

2. What are the common symptoms of OBDII code B2476 in a 2018 GMC Sierra?

Common symptoms include issues with the cellular phone connectivity system, such as the phone not connecting or pairing properly with the vehicle's system.

3. What are possible causes of OBDII code B2476 in a 2018 GMC Sierra?

Potential causes include a faulty Cellular Phone Select Service Switch, wiring issues, or problems with the vehicle's communication network.

4. How can I diagnose the cause of OBDII code B2476 in my 2018 GMC Sierra?

Diagnosing the issue may require using a diagnostic scanner to retrieve the specific code, checking the wiring connections, and testing the Cellular Phone Select Service Switch for proper functionality.

5. Can I still drive my 2018 GMC Sierra with OBDII code B2476 present?

In most cases, you can still drive the vehicle with this code present, but it's recommended to address the issue promptly to ensure proper functionality of the cellular phone system.

6. How can I repair OBDII code B2476 in my 2018 GMC Sierra?

Repairing the issue may involve replacing the faulty Cellular Phone Select Service Switch, repairing any damaged wiring, or addressing any communication network issues in the vehicle.

7. Are there any DIY tips for fixing OBDII code B2476 in a 2018 GMC Sierra?

While some basic troubleshooting like checking connections can be done DIY, it's recommended to consult a professional mechanic for proper diagnosis and repair of this code.

8. Can a software update fix OBDII code B2476 in a 2018 GMC Sierra?

In some cases, a software update may address issues related to the Cellular Phone Select Service Switch and resolve the OBDII code B2476.

9. Is OBDII code B2476 a common problem in 2018 GMC Sierra vehicles?

While not extremely common, issues with the Cellular Phone Select Service Switch can occur in some 2018 GMC Sierra vehicles, leading to the B2476 trouble code.

10. How much does it typically cost to repair OBDII code B2476 in a 2018 GMC Sierra?

The cost of repairing OBDII code B2476 can vary depending on the exact cause of the issue, but it may involve parts and labor expenses ranging from $100 to $300 or more.