AutoCodes – GMC – B2725 GMC

B2725 GMC Code - Transfer Case Range Selection Switch Circuit

Quick Answer

The Transfer Case Shift Control Switch (TCSCS) allows the driver to select between ranges. Common causes include Faulty Transfer Case Range Selection Switch, Transfer Case Range Selection Switch harness is open or shorted, Transfer Case Range Selection Switch 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: B2725 GMC indicates Transfer Case Range Selection Switch Circuit.
Common causes: Common causes include Faulty Transfer Case Range Selection Switch, Transfer Case Range Selection Switch harness is open or shorted, Transfer Case Range Selection Switch 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 3,289

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 30, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B2725 GMC Description

The Transfer Case Shift Control Switch (TCSCS) allows the driver to select between ranges. The Transfer Case Control Module (TCCM) supplies a regulated 5 V, to the switch through the 5-volt reference circuit. The current travels through the specific resistor of the currently selected mode, each mode has its own resistor. The current is then returned to the Transfer Case Control Module through the switch signal circuit. The Transfer Case Control Module continuously monitors the switch signal circuit to determine whether the driver has requested a mode change. The Diagnostic Trouble Code (DTC) sets when the low side driver is ON, the Transfer Case Control Module measures an invalid voltage on the Four-Wheel Drive Switch Signal circuit.

OBDII Code B2725 GMC - Transfer Case Range Selection Switch Circuit - AutoCodes.com — B2725 GMC Code - Transfer Case Range Selection Switch Circuit

What does this mean?

What are the Possible Causes of the DTC B2725 GMC?

Faulty Transfer Case Range Selection Switch
Transfer Case Range Selection Switch harness is open or shorted
Transfer Case Range Selection Switch circuit poor electrical connection
Faulty Transfer Case Control Module

How to Fix the DTC B2725 GMC?

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

B2725:03 Transfer Case Range Selection Switch Circuit Low Voltage
B2725:07 Transfer Case Range Selection Switch Circuit High Voltage
B2725:08 Transfer Case Range Selection Switch Circuit Performance Signal Invalid

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2725 GMC 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 B2725 GMC code?

Need more information on how to fix the B2725 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2725 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

B2725 2014 GMC Sierra — Transfer Case Range Selection Switch Circuit
B2725 2015 GMC Sierra — Transfer Case Range Selection Switch Circuit
B2725 2016 GMC Sierra — Transfer Case Range Selection Switch Circuit
B2725 2017 GMC Sierra — Transfer Case Range Selection Switch Circuit
B2725 2018 GMC Sierra — Transfer Case Range Selection Switch Circuit

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 B2725 GMC Code

1. What are common symptoms of OBDII code B2725 GMC?

The common symptoms of code B2725 include difficulty shifting gears, incorrect gear selection displayed on the dashboard, and the vehicle getting stuck in a particular gear.

2. What causes the OBDII code B2725 GMC to trigger?

The B2725 code is typically triggered by a malfunction in the transfer case range selection switch circuit. This could be due to a faulty switch, wiring issues, or a problem with the transfer case control module.

3. How can I diagnose the issue related to code B2725 GMC?

To diagnose the problem associated with code B2725, you can use a diagnostic scanner to retrieve the trouble codes and perform a thorough inspection of the transfer case range selection switch and its circuitry.

4. Can I still drive my vehicle with OBDII code B2725 GMC?

It is not recommended to drive your vehicle with the B2725 code present, as it can lead to incorrect gear engagement and potential safety hazards. It is best to address the issue promptly.

5. How do I repair OBDII code B2725 GMC?

Repairing the B2725 code involves identifying and fixing the underlying issue with the transfer case range selection switch circuit. This may involve replacing a faulty switch, repairing damaged wiring, or reprogramming the transfer case control module.

6. Is it possible to reset OBDII code B2725 GMC without repairs?

While clearing the trouble code may temporarily turn off the check engine light, it is crucial to address the root cause of the issue to prevent it from reoccurring in the future.

7. Can a DIY enthusiast fix OBDII code B2725 GMC?

Depending on your mechanical skills and access to tools, you may be able to address the B2725 code yourself by following repair guides and tutorials. However, complex electrical issues may require professional assistance.

8. How much does it cost to repair OBDII code B2725 GMC?

The cost of repairing the B2725 code can vary depending on the extent of the issue and the specific repairs needed. It is advisable to obtain quotes from mechanics or repair shops for an accurate estimate.

9. Will OBDII code B2725 GMC affect my vehicle's performance?

Yes, the B2725 code can impact your vehicle's performance by causing shifting problems and potentially compromising the transfer case's functionality. It is important to address the issue promptly to avoid further damage.

10. How often does OBDII code B2725 GMC occur in GMC vehicles?

The B2725 code related to the transfer case range selection switch circuit is not uncommon in GMC vehicles, especially in models equipped with electronic transfer case controls. Regular maintenance and inspections can help prevent this issue.