C0374 on Chevrolet
Transfer Case / Automatic 4WD System Malfunction (manufacturer-specific)
C0374 on Chevrolet vehicles indicates transfer case / automatic 4wd system malfunction (manufacturer-specific). Au7o has documented this code across 1 Chevrolet model — most commonly on Silverado 1500. C0374 is a manufacturer-specific chassis code (commonly seen on GM four-wheel-drive vehicles) that generally indicates a general malfunction in the transfer case / automatic four-wheel-drive control system. When it sets, the Auto 4WD mode is typically unavailable and a 'Service 4WD' message may appear. Because the exact subsystem can vary by maker and model, the precise fault should be confirmed with a factory-level scan tool. This code affects drivetrain/4WD operation rather than braking. Typical repair costs on Chevrolet range from $250 to $1,200, depending on the specific model and root cause.
Common Causes of C0374
- •Faulty transfer case control module
- •Transfer case encoder/actuator motor fault
- •Damaged wiring or connectors in the 4WD circuit
- •Mode-select switch fault
- •Low system voltage or poor ground
- •Mechanical fault within the transfer case
- •Software/calibration issue in the 4WD module
C0374 on Chevrolet by Model
Chevrolet Silverado 1500(1 issue)
- Transfer Case Encoder Motor / Position Sensor Failure Causing Stuck 4WD or Service 4WD Message2000-2013
Silverado 1500 trucks equipped with electronic shift transfer cases commonly develop failures in the transfer case encoder motor, mode position sensor, or related switch/module circuitry. Owners report the truck getting stuck in 2HI, 4HI, or 4LO, flashing selector lights, or displaying a Service 4WD message. GM service information and large numbers of owner complaints/forum reports document the issue across both GMT800 and GMT900 trucks.
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View C0374 across all makes →Frequently Asked Questions
What does C0374 mean on Chevrolet?▼
C0374 stands for "Transfer Case / Automatic 4WD System Malfunction (manufacturer-specific)." C0374 is a manufacturer-specific chassis code (commonly seen on GM four-wheel-drive vehicles) that generally indicates a general malfunction in the transfer case / automatic four-wheel-drive control system. When it sets, the Auto 4WD mode is typically unavailable and a 'Service 4WD' message may appear. Because the exact subsystem can vary by maker and model, the precise fault should be confirmed with a factory-level scan tool. This code affects drivetrain/4WD operation rather than braking. On Chevrolet specifically, this code is documented across 1 model.
What causes C0374 on Chevrolet vehicles?▼
Common causes on Chevrolet: Faulty transfer case control module, Transfer case encoder/actuator motor fault, Damaged wiring or connectors in the 4WD circuit, Mode-select switch fault, Low system voltage or poor ground. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C0374 on a Chevrolet?▼
Repair costs on Chevrolet range from $250 to $1,200, depending on the specific model and root cause.
Which Chevrolet models have C0374 documented?▼
Au7o has documented C0374 on 1 Chevrolet model: Silverado 1500.