Restore the Flawless Performance of Your Cadillac
As a technician with over two decades of experience, I know there’s nothing more frustrating than when a luxury vehicle like a Cadillac DTS starts shifting harshly or gets stuck in gear. That smooth, effortless ride you expect is suddenly gone, replaced by clunky gear changes and a nagging check engine light. More often than not, the culprit is a failing Transmission Control Module (TCM). This VIN-programmed T42 TCM is the definitive solution, designed to restore the precise, reliable shifting your 2006-2011 Cadillac DTS was built for.
This isn’t just a replacement part; it’s a complete repair solution. We pre-program the module to your vehicle’s specific VIN before shipping it. This means you can skip the expensive and time-consuming trip to the dealership for programming. For a professional mechanic, this means faster turnaround times in the bay. For the DIY enthusiast, it means you can confidently complete the job in your own garage with basic tools.
Case Study: A Tricky Diagnosis
I recall a 2009 Cadillac DTS that came into my shop with an intermittent ‘no-upshift’ condition. The owner had already replaced a shift solenoid based on a code, but the problem persisted. After a test drive, I noticed the transmission would only act up after 20 minutes of driving, once everything was up to temperature. A failing component inside the original TCM was becoming heat-sensitive, causing it to drop communication. A simple replacement with a pre-programmed DTS Transmission Control Module like this one solved the issue permanently. The customer was back on the road with a perfectly shifting car the same day, avoiding a costly diagnostic rabbit hole.
Is Your Cadillac Exhibiting These Transmission Problems?
A faulty TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement:
- ✔ Harsh, jerky, or erratic gear shifts.
- ✔ The vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as the generic P0700 or specific solenoid codes like P0750, P0751, P0752, etc.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ Poor acceleration and decreased fuel economy.
- ✔ Complete loss of communication with the transmission.
A Straightforward Guide to Installation
Replacing the TCM on your Cadillac DTS is a manageable job for most skill levels. The module is typically located in the engine bay on the right-hand (passenger) side. Follow these steps for a successful installation:
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and help reset the system.
- Locate the Module: Find the TCM in the RH front engine compartment. It’s a small metal box with electrical connectors.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. Then, unbolt the module from its mounting bracket and remove it from the vehicle.
- Install the New Module: Mount your new, pre-programmed TCM in the same location and securely fasten it. Reconnect the wiring harnesses, ensuring they click into place.
- Final Steps: Reconnect the battery terminal. While our programming handles the critical setup, it’s good practice to use a basic OBD2 scan tool to clear any stored fault codes from the vehicle’s memory. Start the car and enjoy your smooth-shifting transmission!
Verified Vehicle Compatibility
This module is a direct replacement for part number 24238856 and other interchangeable numbers. While it is the correct part for the 2006-2011 Cadillac DTS, it also fits a wide range of other GM vehicles. Please confirm your model and location below:
- Cadillac DTS (2006-2011): Transmission; (RH front engine compartment)
- Buick Allure / LaCrosse (2006-2009): Transmission; (lower air cleaner housing)
- Buick Lucerne (2006-2011): Transmission; (LH engine compartment)
- Chevrolet Cobalt / HHR / Impala / Monte Carlo (2006-2011): Location varies (LH strut tower, lower air cleaner housing, etc.)
- Chevrolet Silverado / Tahoe / Suburban (2007-2013): Transmission; (next to battery)
- GMC Sierra / Yukon (2007-2013): Transmission; (next to battery)
- Pontiac G5 / G6 / Grand Prix (2006-2010): Location varies (LH strut tower, lower air cleaner housing)
- …and many other GM models listed in the full fitment guide.
Frequently Asked Questions
What does ‘VIN Programmed’ mean for my DTS Transmission Control Module?
It means we load your car’s unique 17-digit Vehicle Identification Number (VIN) and the latest GM software onto the module before we ship it. This ensures it communicates perfectly with your vehicle’s engine computer and other systems right out of the box, eliminating the need for dealership programming.
Will this part fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer (ECM) to turn on the check engine light. In many cases where the TCM itself has failed, replacing it will resolve the P0700 code and any related transmission codes. However, you should always diagnose any other codes present to ensure there isn’t another issue.
Is this a difficult part to install myself?
For most DIYers with basic hand tools, this is a very straightforward installation. The module is easily accessible in the engine bay, and since it comes pre-programmed, there are no complicated software steps. The entire process typically takes less than 30 minutes.
Do I need to return my old TCM?
No, there is no core charge or need to send your old part back to us. This makes the transaction simple and hassle-free.