AutoCodes – GMC – B2725 2015 GMC Sierra

B2725 2015 GMC Sierra 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 2015 GMC Sierra 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 233

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 2015 GMC Sierra 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 2015 GMC Sierra - Transfer Case Range Selection Switch Circuit - AutoCodes.com — B2725 2015 GMC Sierra Code - Transfer Case Range Selection Switch Circuit

What does this mean?

What are the Possible Causes of the DTC B2725 2015 GMC Sierra?

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 2015 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

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 2015 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 B2725 2015 GMC Sierra code?

Need more information on how to fix the B2725 2015 GMC Sierra code? Get Access to Factory Service Manuals

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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 B2725 2015 GMC Sierra Code

What does the OBDII code B2725 mean on a 2015 GMC Sierra?

Code B2725 indicates an issue with the Transfer Case Range Selection Switch Circuit, which monitors the position of the transfer case switch for proper operation.

What are the symptoms of code B2725 in a 2015 GMC Sierra?

Symptoms may include the inability to shift into 4WD, the transfer case stuck in one mode, or the 4WD indicator lights failing to respond correctly.

What causes the B2725 code on a GMC Sierra?

Common causes include a faulty transfer case range selection switch, damaged wiring or connectors, or issues with the transfer case control module.

How can I diagnose code B2725 on my GMC Sierra?

Start by inspecting the transfer case range selection switch, checking for damaged wiring or loose connections, and using a scan tool to monitor switch inputs and outputs.

Can I drive my 2015 GMC Sierra with code B2725 active?

While driving may still be possible, code B2725 can prevent proper 4WD operation, which may impact traction and handling in off-road or slippery conditions.

How do I fix code B2725 on a GMC Sierra?

Repairs may involve replacing the transfer case range selection switch, repairing damaged wiring, or reprogramming or replacing the transfer case control module if necessary.

What tools are needed to troubleshoot code B2725?

Youâ€™ll need a diagnostic scan tool, a multimeter for checking electrical circuits, and possibly wiring diagrams for the transfer case system.

Is the transfer case range selection switch expensive to replace?

The cost of replacing the switch varies but is generally affordable. Labor costs may increase the total repair cost depending on the complexity of the work.

Can a software issue cause code B2725 in a GMC Sierra?

Yes, software glitches in the transfer case control module can sometimes cause this code, requiring a reprogramming or update to resolve the issue.

How can I prevent code B2725 from occurring again?

Regular inspections of the transfer case system, ensuring wiring is secure and undamaged, and keeping the system clean and free of contaminants can help prevent future issues.