AutoCodes – GMC – B1271 2017 GMC Sierra

B1271 2017 GMC Sierra Code - Theft Protection Active

Quick Answer

When the radio is initially installed in the vehicle, the radio receives Vehicle Identification Number (VIN) information via serial data. Common causes include Reprogram Radio, Faulty Radio. 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: B1271 2017 GMC Sierra indicates Theft Protection Active.
Common causes: Common causes include Reprogram Radio, Faulty Radio.
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 343

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 Apr 14, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1271 2017 GMC Sierra Description

When the radio is initially installed in the vehicle, the radio receives Vehicle Identification Number (VIN) information via serial data. The radio stores a portion of the VIN and compares this sequence to the VIN information received each time the radio powers on. The VIN in the radio is a single one-time learn.
The radio theft deterrent system is intended to disable or limit radio functionality if incorrect vehicle information is received by radio. The radio disables functionality if the VIN information received by the radio does not match the VIN information that has been learned by the radio. This Diagnostic Trouble Code (DTC) is generated by the module when the Theft Protection is activated.
The DTC will be set when the radio receives the correct VIN information via serial data.

OBDII Code B1271 2017 GMC Sierra - Theft Protection Active - AutoCodes.com — B1271 2017 GMC Sierra Code - Theft Protection Active

What does this mean?

What are the Possible Causes of the DTC B1271 2017 GMC Sierra?

Reprogram Radio
Faulty Radio

How to Fix the DTC B1271 2017 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 B1271 2017 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 B1271 2017 GMC Sierra code?

Need more information on how to fix the B1271 2017 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1271 2017 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 B1271 2017 GMC Sierra Code

1. What does the OBDII code B1271 on a 2017 GMC Sierra mean?

The code B1271 indicates that the theft protection system is active on the vehicle.

2. What are some common symptoms of the theft protection system being active on a 2017 GMC Sierra?

Common symptoms may include the vehicle not starting, the security light flashing, or the engine shutting off shortly after starting.

3. What can cause the theft protection system to become active on a 2017 GMC Sierra?

Possible causes include a faulty key fob, a problem with the ignition switch, or issues with the vehicle's security system module.

4. How can I troubleshoot the OBDII code B1271 on my 2017 GMC Sierra?

To troubleshoot this code, you may try using a different key fob, checking the battery in the key fob, ensuring the vehicle's battery is fully charged, and inspecting the ignition system for any faults.

5. Can I reset the theft protection system on my 2017 GMC Sierra to clear the B1271 code?

In some cases, disconnecting the vehicle's battery for a few minutes may reset the system and clear the code. However, it is recommended to address the underlying issue to prevent the code from reoccurring.

6. Is it safe to continue driving my 2017 GMC Sierra with the theft protection system active?

It is not recommended to drive the vehicle with the theft protection system active, as it may lead to unexpected engine shutdowns or other issues while driving.

7. Will clearing the B1271 code on my 2017 GMC Sierra disable the theft protection system?

Clearing the code may temporarily disable the theft protection system, but if the underlying issue is not addressed, the system may become active again.

8. How much does it typically cost to repair the B1271 code on a 2017 GMC Sierra?

The cost of repairs for the B1271 code can vary depending on the cause of the issue. It is recommended to consult with a professional mechanic for an accurate diagnosis and cost estimate.

9. Can a DIY enthusiast fix the B1271 code issue on a 2017 GMC Sierra?

While some basic troubleshooting steps can be taken by a DIY enthusiast, resolving the underlying cause of the B1271 code may require specialized tools and expertise best handled by a professional mechanic.

10. Will disconnecting the battery reset the B1271 code on my 2017 GMC Sierra?

Disconnecting the battery may reset the code temporarily, but it is important to address the root cause of the issue to prevent the code from reappearing.