AutoCodes – GMC – B2745 2017 GMC Sierra

B2745 2017 GMC Sierra Code - Traction Control Switch Circuit

Quick Answer

The Body Control Module (BCM) monitors the signal circuit from the traction control switch. Common causes include Faulty Multifunction Switch Instrument Panel, Multifunction Switch Instrument Panel harness is open or shorted, Multifunction Switch Instrument Panel 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
B2745 2017 GMC Sierra indicates Traction Control Switch Circuit.
Common causes
Common causes include Faulty Multifunction Switch Instrument Panel, Multifunction Switch Instrument Panel harness is open or shorted, Multifunction Switch Instrument Panel 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 221
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 01, 2023
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Code B2745 2017 GMC Sierra Description

The Body Control Module (BCM) monitors the signal circuit from the traction control switch. When the traction control switch is pressed once, the body control module will request the electronic brake control module via serial data to disable the traction control. The electronic brake control module will request the instrument cluster via serial data to turn the traction control off indicator ON to notify the driver of the deactivation.
When the traction control switch is pressed and held for 5 s, the body control module will request the electronic brake control module to disable the traction control and the electronic stability control. The electronic brake control module will request the instrument cluster via serial data to turn the traction control off and stability control off indicator ON to notify the driver of the deactivation. The Diagnostic Trouble Code (DTC) sets when the BCM detects a problem in the signal circuit.
OBDII Code B2745 2017 GMC Sierra - Traction Control Switch Circuit - AutoCodes.com
B2745 2017 GMC Sierra Code - Traction Control Switch Circuit

What are the Possible Causes of the DTC B2745 2017 GMC Sierra?

  • Faulty Multifunction Switch Instrument Panel
  • Multifunction Switch Instrument Panel harness is open or shorted
  • Multifunction Switch Instrument Panel circuit poor electrical connection
  • Faulty Body Control Module (BCM)

How to Fix the DTC B2745 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 B2745 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 B2745 2017 GMC Sierra code?

Need more information on how to fix the B2745 2017 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 B2745 2017 GMC Sierra Code

1. What does OBDII code B2745 on a 2017 GMC Sierra mean?

The code B2745 indicates a problem with the Traction Control Switch Circuit in your vehicle.

2. What are the common symptoms of a Traction Control Switch Circuit issue?

Common symptoms include the traction control system not responding to switch commands, the traction control light staying illuminated, or the system being inoperative.

3. What are the possible causes of OBDII code B2745 on a 2017 GMC Sierra?

Potential causes include a faulty traction control switch, damaged wiring or connectors in the switch circuit, or a malfunction in the traction control module.

4. How can I diagnose the Traction Control Switch Circuit problem in my 2017 GMC Sierra?

You can start by checking the traction control switch for any physical damage or signs of wear. Additionally, using a diagnostic scanner to read the trouble codes and testing the circuit for continuity can help pinpoint the issue.

5. Can I continue driving my 2017 GMC Sierra with OBDII code B2745?

While it may be possible to drive the vehicle with this code, it is recommended to address the issue promptly to ensure the proper functioning of the traction control system.

6. How can I repair the Traction Control Switch Circuit problem in my GMC Sierra?

Repair options may include replacing the traction control switch, repairing or replacing damaged wiring or connectors, or reprogramming the traction control module as needed.

7. Is it possible to reset the OBDII code B2745 on a 2017 GMC Sierra without fixing the underlying issue?

Resetting the code without addressing the root cause of the problem may temporarily turn off the warning light, but the issue will likely reoccur until properly repaired.

8. Are there any DIY tips for troubleshooting OBDII code B2745 in a 2017 GMC Sierra?

DIY enthusiasts can start by inspecting the traction control switch and its connections for any visible damage or loose connections before proceeding with further diagnostics or repairs.

9. How much can I expect to pay to fix the Traction Control Switch Circuit issue in a 2017 GMC Sierra?

The cost of repair can vary depending on the exact cause of the problem and whether you choose to fix it yourself or take it to a professional mechanic. It's advisable to obtain quotes from different repair shops for an accurate estimate.

10. Can extreme weather conditions affect the Traction Control Switch Circuit in a 2017 GMC Sierra?

Extreme temperatures or moisture can potentially impact the performance of the traction control system and its components, so it's essential to keep the vehicle well-maintained and protected from adverse weather conditions.

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