Restore Peak Drivetrain Performance in Your Cadillac
If you’re experiencing erratic all-wheel-drive behavior, unsettling noises from your drivetrain, or a persistent “Service AWD” light on your dash, a failing transfer case control module is a likely culprit. This critical component is the electronic brain of your vehicle’s AWD system, responsible for interpreting data from various sensors and engaging the transfer case clutches to deliver optimal traction and stability. When it fails, it can lead to a host of drivability issues and diagnostic headaches. This replacement module, part number 24239785, is the definitive solution for your 2010-2011 Cadillac STS and other compatible GM vehicles.
From the Diagnostic Bay
We recently had a 2011 Cadillac STS in the shop with a frustrating, intermittent “Service All Wheel Drive” warning. The owner had already spent a small fortune replacing wheel speed sensors and even the transfer case fluid, but the light kept coming back, especially during tight, low-speed turns. After scanning the vehicle, we found several U-series communication codes pointing to a network issue. Instead of chasing phantom wiring problems, we went straight to the source: the Transfer Case Control Module. On these platforms, the module can begin to fail internally, causing it to drop off the vehicle’s data network intermittently. We installed a VIN-programmed module, performed the relearn procedure, and the problem was solved permanently. The owner was thrilled to have his car’s confident handling back without the distracting warning lights.
Common Symptoms of a Failing Module
- ✔ A “Service AWD” or “Service 4WD” warning light illuminated on the dashboard.
- ✔ The vehicle feels like it’s stuck in two-wheel drive, with no power being sent to the front or rear wheels when needed.
- ✔ Audible clunking, grinding, or binding noises during turns, especially at low speeds.
- ✔ Inconsistent or delayed engagement of the all-wheel-drive system, leading to tire slippage in wet or snowy conditions.
- ✔ Diagnostic trouble codes (DTCs) related to the transfer case or loss of communication with the module (U-codes).
- ✔ The vehicle may feel sluggish or exhibit unusual shifting patterns as the Powertrain Control Module (PCM) tries to compensate for the faulty module.
The Plug-and-Play Solution: A Pre-Programmed 2010-2011 STS Transfer Case Module
Replacing a modern vehicle module isn’t as simple as just swapping the part. The new module must be programmed with software specific to your vehicle’s unique Vehicle Identification Number (VIN). This process traditionally requires expensive scan tools and a trip to the dealership. We eliminate that hassle. When you purchase this module from us, you provide your VIN, and our technicians will flash the unit with the latest, most stable software updates directly from GM. This ensures that the 2010-2011 STS Transfer Case Module communicates flawlessly with your vehicle’s other computers right out of the box.
Why VIN-Specific Programming is Crucial
Your vehicle’s VIN dictates everything from the tire size and gear ratio to specific electronic options. Using a generic or improperly programmed module can cause a cascade of new problems, including incorrect speedometer readings, ABS faults, and persistent check engine lights. Our VIN-matching service guarantees that the module you receive is a perfect electronic match for your car, preserving its original functionality and performance characteristics. This is not a one-size-fits-all solution; it’s a tailored repair for your exact vehicle.
Broad Compatibility Beyond the Cadillac STS
While this is a direct-fit solution for the 2010-2011 Cadillac STS transfer case, this module (part number 24239785) is also compatible with a range of other GM vehicles, serving as either a transmission or transfer case controller. It interchanges with part numbers 24235224 and YLMU. Compatible models include:
- Cadillac STS (2007): Transmission
- Pontiac Solstice (2006-2010): Transmission
- Saturn Sky (2007-2010): Transmission
- Cadillac SRX (2007-2009): Transmission
- Cadillac CTS (2010): Transfer Case
By ordering from us, you are not just buying a part; you are getting a comprehensive solution that restores your vehicle’s sophisticated drivetrain to factory specifications. Fix it right the first time with a professionally programmed module and get back on the road with confidence.
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential for us to program the module with the correct software and calibrations for your specific vehicle. This ensures compatibility with your car’s engine, transmission, tire size, and other factory-installed options, making the installation process seamless.
Is this part difficult to install?
The physical installation is straightforward for a moderately skilled DIYer or any professional mechanic. The module is typically located on the LH front frame rail or on the RH side of the dash, depending on your model. Since we pre-program the module, no special tools are needed for software flashing, though a basic scan tool may be required for a final relearn procedure in some cases.
Will this fix my “Service AWD” light?
If the warning light is caused by a faulty or failing transfer case control module, this part is the correct solution. A proper diagnosis is always recommended to rule out other potential issues like faulty sensors or wiring problems. This module corrects issues related to internal failure and communication loss.
Is this a new or used part?
This is a high-quality, inspected, and tested used OEM component. Each module is verified to be fully functional before being programmed with the latest GM software for your vehicle’s VIN, ensuring reliable performance.
What if I order the wrong part?
We strongly encourage you to verify the part number on your original module before ordering. Our VIN programming process helps ensure you receive a compatible part, but verifying the physical part number is the best way to guarantee a perfect match. Please contact our support team if you have any questions about fitment.