Restore the Flawless Shifting of Your Cadillac DTS
Is your 2006-2011 Cadillac DTS suffering from jarring shifts, delayed gear engagement, or a frustrating check engine light? A faulty Transmission Control Module (TCM) can disrupt the refined performance you expect from your vehicle. This T42 TCM, equivalent to part number 24243921, is the definitive solution. As the electronic brain of your automatic transmission, it precisely manages shift points, torque converter clutch operation, and fluid pressure. We pre-program this module to your vehicle’s specific VIN, ensuring it arrives ready for a direct, plug-and-play installation without requiring a costly trip to the dealership for programming.
Case Study: A Tricky Diagnosis
A customer brought in their 2009 Cadillac DTS with a complaint that was driving them crazy: intermittent, bone-jarring shifts from 1st to 2nd gear, but only after the car was fully warmed up. No consistent trouble codes were stored, just a generic P0700 (Transmission Control System Malfunction) that would pop up occasionally. We checked the fluid, solenoids, and wiring, and everything seemed fine. In my experience, these heat-related, intermittent electrical gremlins in GM transmissions often point back to the TCM. The internal circuit board develops micro-fractures that only cause issues when they expand with heat. We installed a VIN-programmed T42 module, and the problem was solved instantly. The car shifted like it just rolled off the showroom floor.
Is Your DTS Showing These Symptoms?
- ✔ Harsh, slamming, or erratic gear changes.
- ✔ The vehicle is stuck in a single gear (often called “limp mode”).
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ An illuminated Check Engine Light with transmission-related Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid codes.
- ✔ Failure to upshift or downshift, leading to poor acceleration and fuel economy.
- ✔ Complete loss of communication with the transmission module.
A Straightforward Guide to Installation
Replacing the 2006-2011 DTS Transmission Module is a job most DIYers can handle in their own garage. For the Cadillac DTS, the module is conveniently located in the engine compartment. No complex procedures or specialized tools are needed.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Locate the Module: On the DTS, you’ll find the TCM in the right-hand (passenger side) front of the engine compartment.
- Disconnect and Remove: Carefully unplug the electrical connectors. Be gentle with the locking tabs. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed module into place and securely reconnect the electrical harnesses.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s always good practice to use a basic OBD2 scan tool to clear any lingering fault codes from the vehicle’s memory.
Guaranteed Fitment for Your Vehicle
This module is a direct-fit replacement for the T42 TCM in the specified Cadillac DTS models. It is also interchangeable with a wide range of other GM vehicles that use the same controller, ensuring broad compatibility and OEM-level function. It directly replaces part numbers including 24243921, 24234503, 24252114, and others.
- Cadillac DTS: 2006, 2007, 2008, 2009, 2010, 2011 (RH front engine compartment)
Frequently Asked Questions
Do I need to have this module programmed by a dealer?
No. We pre-program the module to your vehicle’s VIN before shipping. It arrives ready for installation, saving you time and money.
Is this a difficult part to replace myself?
For most individuals with basic mechanical skills, this is a straightforward replacement that can be completed in under an hour with common hand tools.
What happens if I don’t replace a failing TCM?
Continuing to drive with a faulty TCM can lead to more severe transmission damage, poor fuel efficiency, unpredictable performance, and could leave you stranded.
Will this fix my P0700 trouble code?
A P0700 code indicates a general transmission fault. If the root cause is a failing TCM, this part will resolve the issue and allow the code to be cleared.
What is the warranty on this part?
This module comes with a one-year warranty, giving you peace of mind and confidence in your repair.