Restore Flawless Shifting to Your Cadillac
Are you experiencing frustrating and unpredictable transmission issues with your Cadillac STS or other compatible GM vehicle? Symptoms like harsh shifting, getting stuck in gear, or an illuminated Check Engine Light can point directly to a failing Transmission Control Module (TCM). This critical component is the brain of your automatic transmission, and when it falters, it can make your driving experience stressful and potentially unsafe. We offer a direct, reliable solution: a replacement TCM, part number 24239785, professionally programmed to your vehicle’s specific VIN before it ever leaves our facility.
From the Diagnostic Bay
We recently had a 2011 Cadillac STS towed in with symptoms that screamed major internal failure. The owner was convinced he needed a new transmission, which would have cost thousands. It was slamming into gear from a stop and would intermittently refuse to shift past 3rd gear, triggering a P0756 (Shift Solenoid ‘B’ Performance) code. Before condemning the entire unit, we followed our diagnostic process. We checked the fluid, wiring, and then focused on the module. After installing a test TCM, the car shifted like it just rolled off the showroom floor. The issue was entirely electronic. This pre-programmed module allows you to perform that same, cost-effective repair, bypassing the need for a full transmission replacement and saving you a significant amount of money and time.
Common Symptoms of a Failing TCM
- ✔ Abrupt, harsh, or jerky gear changes.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ Vehicle entering “limp mode,” often stuck in a single gear (like 2nd or 3rd).
- ✔ Check Engine Light or “Service Transmission” warning illuminated on the dash.
- ✔ Inaccurate gear position display on the instrument cluster.
- ✔ Complete loss of communication with the module, often resulting in U-codes (e.g., U0101).
- ✔ Specific transmission-related Diagnostic Trouble Codes (DTCs) stored in the system.
The Premier Solution: A Pre-Programmed 2010-2011 STS TCM
Don’t settle for a generic part that requires an expensive trip to the dealership for programming. Our process provides a comprehensive solution. When you order, you provide us with your vehicle’s 17-digit VIN. Our technicians then use that information to flash the module with the latest, most stable software updates directly from GM. This ensures that the new TCM integrates seamlessly with your vehicle’s engine computer (ECU) and other onboard systems, restoring original performance and efficiency. This plug-and-play approach eliminates the need for specialized tools or costly dealer services, making it the ideal choice for both professional technicians and savvy DIYers.
Guaranteed Compatibility
This module is a direct replacement for several part numbers, ensuring a perfect fit and function for your vehicle. It is fully compatible with the following part numbers:
- 24239785
- 24235224
- YLMU
This part will fit these makes and models with these options:
Cadillac CTS: 2010 (Transfer Case; RH dash), ID 2423522, YLMU, or 24239785
Cadillac SRX: 2007-2009 (Transmission; RH front engine compartment)
Cadillac STS: 2007 (Transmission)
Cadillac STS: 2010-2011 (Transfer Case; RH dash)
Pontiac Solstice: 2006-2010 (Transmission; LH front frame rail)
Saturn Sky: 2007-2010 (Transmission; LH front frame rail)
Frequently Asked Questions
Why do you need my VIN number?
Your Vehicle Identification Number (VIN) is essential because it allows us to load the exact GM-specified software for your vehicle’s unique configuration, including engine type, drivetrain, and other options. This programming is critical for the Transmission Control Module to function correctly.
Do I need to have a dealer program this part after I install it?
No. The main benefit of our service is that the module arrives at your door fully programmed and ready for installation. This saves you the time, expense, and hassle of a trip to the dealership.
Is any other procedure required after installation?
While the module is plug-and-play, some vehicles may require a “fast learn” or “adaptive learn” reset using a compatible professional scan tool. This allows the new module to quickly learn the mechanical tolerances of your specific transmission for the smoothest possible shifting. We also recommend a fluid and filter change during installation if it hasn’t been done recently.
Will this fix my P0700 trouble code?
A P0700 code is a generic request from the TCM to the Engine Control Module (ECM) to turn on the Check Engine Light. It means there is a more specific transmission-related code stored in the TCM itself. While a faulty TCM can cause this, you must read the specific codes from the TCM to properly diagnose the issue. This module will fix the problem if the underlying codes point to an internal TCM failure.
Do I need to return my old TCM?
No, there is no core charge or requirement to send your old part back to us. You can keep it or dispose of it as you see fit.