B2725 on GMC: How to Diagnose & Fix
Transfer Case Mode/Range Selector Switch Circuit
1 GMC model · 1 documented issue · 1 critical · $300-$800 repair
B2725 on GMC by model: symptoms, diagnosis and fix
The electronic steering column lock (ESCL) actuator in 2015-2020 Yukon XL models develops a clicking, popping, or grinding noise when turning the steering wheel, particularly at startup. In some cases, the ESCL prevents the vehicle from starting entirely, displaying a "Steering Column Lock" message. GM issued TSB 16-NA-012 acknowledging the issue. The ESCL motor gear teeth strip or the position sensor misreads, causing the lock to partially engage or fail to release.
Common Symptoms
- Clicking or popping noise from steering column on startup
- Vehicle will not start — Steering Column Lock message
- Grinding noise when turning the key or pressing start
- Intermittent no-crank condition
- Steering wheel feels temporarily locked after parking
How to Fix
Replace the electronic steering column lock actuator assembly (GM part 13501988). The replacement procedure requires disconnecting the battery, removing the lower steering column cover, and swapping the ESCL module. A Tech 2 or MDI scan tool relearn procedure must be performed after installation to program the new module to the BCM. Some owners have the ESCL permanently disabled via BCM programming at the dealer, though this may affect theft deterrent system operation.
Sources for this issue (1)
B2725 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does B2725 mean on a GMC?
B2725 stands for "Transfer Case Mode/Range Selector Switch Circuit." B2725 is most commonly defined on GM 4WD vehicles as a fault in the transfer case (4WD) mode/range selector switch circuit. The transfer case control module or BCM monitors the dash-mounted 4WD selector switch and sets this code when it reads an invalid or out-of-range signal. It typically triggers a 'Service 4WD' message and can leave the 4WD system stuck in its current mode until repaired. On GMC it is documented across 1 model: Yukon XL.
What are the most common causes of B2725?
The most common causes of B2725 are: Faulty 4WD/transfer case selector switch (most common), Worn or corroded switch internal contacts, Damaged wiring between switch and module, Corroded or loose connector at the switch, Open or shorted circuit, Transfer case control module fault. The specific cause varies by vehicle.
How much does it cost to fix B2725 on a GMC?
Published repair estimates on GMC range from $300 to $800 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for B2725 on a different make?
View B2725 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.