Is Your Cadillac or GM Vehicle Experiencing Transmission Problems?
Are you dealing with erratic shifting, a check engine light that won’t go away, or a transmission that seems to have a mind of its own? These are classic signs of a failing Transmission Control Module (TCM). In vehicles like the 2007 Cadillac STS, CTS, SRX, Pontiac Solstice, and Saturn Sky, the TCM is the electronic brain of the automatic transmission. When it fails, it can cause a cascade of frustrating and potentially damaging issues, often leading to a misdiagnosis of a much more expensive mechanical transmission failure.
The Smart Solution: A VIN-Programmed Replacement TCM
Don’t let a faulty module keep you off the road. This replacement Transmission Control Module, part number 24239785 (also compatible with 24235224 and YLMU), is the definitive solution to restore your vehicle’s transmission performance. The most significant advantage of our service is that we program the module specifically to your vehicle’s Vehicle Identification Number (VIN) before it ships. This means it arrives ready for installation, eliminating the need for an expensive trip to the dealership for programming. We flash it with the latest GM-certified software updates, ensuring optimal performance, fuel efficiency, and longevity.
From the Diagnostic Bay
We once had a 2008 Saturn Sky come in with what the owner was convinced was a “blown transmission.” It was shifting violently from first to second and would occasionally get stuck in third gear. Another shop had quoted him over $3,500 for a transmission rebuild. We hooked up our diagnostic scanner and found no communication with the TCM. Instead of jumping to conclusions, we checked the power and ground to the module, which were fine. The issue was a classic internal failure of the TCM itself. We replaced it with a VIN-programmed unit just like this one, and the car drove off shifting as smoothly as it did the day it left the factory. A $3,000+ potential bill turned into a simple module swap. Always diagnose the electronics first!
Common Symptoms of a Failing TCM
- ✔ Check Engine Light is on with transmission-related fault codes (e.g., U0101, P0700).
- ✔ Harsh, erratic, or delayed shifting between gears.
- ✔ Vehicle gets stuck in one gear (limp mode).
- ✔ Inability to shift into reverse or drive.
- ✔ Poor fuel economy due to incorrect gear selection.
- ✔ Complete loss of communication with the TCM on a diagnostic scan tool.
- ✔ Warning messages on the dashboard like “Service Transmission.”
Why Choose Our Pre-Programmed 2007 STS TCM?
This isn’t just a part; it’s a complete, ready-to-install solution. The TCM is a critical component that requires precise software to function with your vehicle’s engine, ABS, and other systems. Our process ensures seamless integration. By providing your VIN at checkout, you empower our technicians to load the exact factory software your vehicle requires. This pre-programming service saves you hundreds of dollars in dealer fees and significant vehicle downtime. Simply install the module, perform any necessary relearn procedures (if applicable), and get back to enjoying a smooth-shifting ride.
Wide-Ranging GM Compatibility
While this is a perfect solution for a 2007 STS TCM, this module’s versatility extends to a range of popular GM models. Please verify your part number and check the compatibility list below to ensure a perfect fit for your vehicle:
- Cadillac STS: 2007 (Transmission); 2010-2011 (Transfer Case)
- Cadillac CTS: 2010 (Transfer Case, ID 2423522, YLMU, or 24239785)
- Cadillac SRX: 2007-2009 (Transmission)
- Pontiac Solstice: 2006-2010 (Transmission)
- Saturn Sky: 2007-2010 (Transmission)
Frequently Asked Questions
How does the VIN programming process work?
It’s simple! After you complete your purchase, you will provide us with your vehicle’s 17-digit VIN. Our technicians will use this number to access the latest GM software database and flash the module with the correct calibration file for your specific vehicle configuration. This ensures the TCM works perfectly with your engine, tire size, and other factory options right out of the box.
Is this a plug-and-play part?
Yes, because we program it to your VIN, it is designed to be a direct-fit, plug-and-play solution. In some cases, a simple transmission fluid level check or a short drive cycle is all that’s needed for the system to fully adapt. It completely bypasses the need for a dealer’s proprietary scan tool for programming.
Where is the TCM located on my vehicle?
The location varies by model. On the Saturn Sky and Pontiac Solstice, it’s typically on the left-hand front frame rail. For the Cadillac SRX, it’s often found in the right-hand front of the engine compartment. On some CTS and STS models, it may be located near the RH dash or as part of the transfer case assembly. Always consult a service manual for your specific vehicle to confirm the exact location before beginning installation.
Do I need to return my old TCM (core)?
This listing does not require a core return. You can keep your old part or dispose of it responsibly. This saves you the time and hassle of shipping a core back to us.
What if I order the wrong part?
We strongly encourage you to match your original part number (24239785, 24235224, or YLMU) and verify your vehicle’s make, model, and year against our fitment list. Providing your VIN for programming is our final check to ensure compatibility. If you are unsure, please contact us before ordering so we can help you verify the correct part for your vehicle.