If you’re dealing with unpredictable shifting, a transmission stuck in limp mode, or confusing error codes on your 2006-2011 Cadillac DTS, you’ve likely pinpointed the culprit: a failing Transmission Control Module (TCM). As the electronic brain of your automatic transmission, a faulty TCM can make your luxury vehicle feel unreliable and unsafe. This T42 TCM, corresponding to part number 24240449, is the definitive solution, arriving expertly programmed to your vehicle’s specific VIN for a true plug-and-play repair.
Case Study: A Tricky Diagnosis
I remember a 2008 Cadillac DTS that came into my shop with a classic complaint: intermittent harsh shifting and occasionally getting stuck in 3rd gear. The owner had already replaced a shift solenoid with no luck. When I hooked up my scan tool, I saw a generic P0700 (Transmission Control System Malfunction) code and a U0101 (Lost Communication with TCM) code. These communication codes are a dead giveaway. After 20+ years of diagnostics, I know that heat soak in the engine bay is the number one killer of these T42 modules. We installed a VIN-programmed module, and the car’s shifting was immediately smooth and responsive. The customer was thrilled to have his car back without a costly trip to the dealership for programming.
Is Your Cadillac DTS Showing These Transmission Warning Signs?
A failing TCM doesn’t heal itself; it only gets worse. If you’re noticing any of the following, it’s time for a replacement:
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ The vehicle is stuck in a single gear (limp mode) to protect the transmission.
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750-P0758 (solenoid circuit faults), or U-codes indicating communication loss.
- ✔ A noticeable drop in fuel economy as the transmission operates inefficiently.
- ✔ The transmission feels like it’s slipping between gears.
The Direct-Fit Solution for Your 2006-2011 DTS Transmission Module
This isn’t just a replacement part; it’s a complete solution designed to get your Cadillac back to factory performance without the usual hassle.
- ✔ 100% Plug-and-Play: We program the module to your car’s VIN before shipping. This means no expensive programming or security relearn procedures are needed at a dealership. It’s ready to install right out of the box.
- ✔ Restored Performance: By precisely controlling shift points, torque converter lockup, and line pressure, this module restores the smooth, predictable shifting you expect from your DTS.
- ✔ Built for Reliability: Constructed to meet or exceed OEM specifications, this module is designed to withstand the harsh heat and vibration of the engine compartment, ensuring long-term durability.
- ✔ No Core Charge: Keep your old part. We don’t require a core return, saving you time and the hassle of shipping your old module back.
Your Straightforward 30-Minute Installation Guide
For the Cadillac DTS, this is a very accessible job for a DIYer or any professional mechanic. No special tools are required.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: On the 2006-2011 Cadillac DTS, the TCM is located in the right-hand (passenger side) front of the engine compartment.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. Then, unbolt the module from its mounting bracket.
- Install the New Module: Mount the new VIN-programmed TCM in place and tighten the bolts. Reconnect the electrical harnesses, ensuring they click securely into place.
- Final Steps: Reconnect the battery terminal. While our programming handles the critical setup, it’s always good practice to use a basic 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 T42 Transmission Control Module is a guaranteed fit for the following vehicle:
- Cadillac DTS: 2006, 2007, 2008, 2009, 2010, 2011 (Located in RH front engine compartment)
This module also serves as a direct replacement for a wide range of other GM vehicles, including various models of the Chevrolet Silverado, Tahoe, Impala; GMC Sierra, Yukon; Buick LaCrosse, and more. It is interchangeable with part numbers 24252114, 24234503, 24230461, 24240449, and others.
No. This is the biggest benefit we offer. We pre-program the module to your vehicle’s specific VIN before it ships, making it a true plug-and-play installation. This saves you hundreds of dollars and a trip to the dealership.
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 most cases where the TCM itself has failed, replacing it with this programmed module will resolve the root cause of the P0700 and other related transmission codes.
The primary cause of failure is repeated exposure to high heat and vibration within the engine bay. Over many years and thousands of heat cycles, the internal electronic components and solder joints can degrade, leading to intermittent or complete failure.
Not at all. For the Cadillac DTS, the module is easily accessible in the engine bay. With basic hand tools, the swap typically takes less than 30 minutes, making it an ideal repair for both DIY enthusiasts and professional technicians.