Restore the Flawless Shifting Performance of Your Cadillac DTS
Your Cadillac DTS was engineered for a smooth, luxurious, and responsive driving experience. When the Transmission Control Module (TCM) begins to fail, that experience is replaced with harsh, unpredictable shifting, warning lights, and a general lack of confidence on the road. As a technician with over two decades of experience, I’ve seen firsthand how a faulty TCM can make a premium vehicle feel unreliable. This T42 Transmission Control Module, part number 24230461, is the definitive solution to restore the precise, factory-new performance your vehicle deserves.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We handle the most complex part of the job for you: programming. Before shipping, we flash the module with the latest GM software updates and program it specifically to your vehicle’s VIN. This eliminates the need for expensive dealership programming or specialized scan tools, making it a true plug-and-play repair for both professional mechanics and DIY enthusiasts. Get your Cadillac back to driving the way it was meant to.
Case Study: A Tricky Diagnosis
A customer brought in their 2008 Cadillac DTS with a complaint of intermittent, severe shift shock, especially on the 2-3 upshift, but only after the car was fully warmed up. There were no consistent trouble codes, just a generic P0700 (Transmission Control System Malfunction) that would pop up occasionally. We checked fluid levels and solenoid resistances, which were all within spec. After hours of chasing what seemed like a mechanical ghost, we swapped in a known-good programmed TCM. The problem vanished instantly. The original TCM’s internal processor was failing under heat, a common issue I’ve seen in over 100 similar GM repairs. This highlights why replacing the entire 2006-2011 DTS TCM is often the most direct and reliable fix.
Is Your Cadillac DTS Showing These Signs?
A failing TCM sends clear warning signals. If you’re noticing any of the following, it’s a strong indicator that your module needs replacement. Addressing it early can prevent further damage to your transmission’s mechanical components.
- ✔ Harsh, banging, or erratic gear shifts.
- ✔ Vehicle becomes stuck in one gear (often called “limp mode”).
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750-series solenoid codes, or communication errors.
- ✔ A noticeable decrease in fuel economy.
- ✔ Complete loss of shifting capability.
A Straightforward Guide to Installation
Installing your new 2006-2011 DTS TCM is a simple process that can typically be completed in under 30 minutes with basic hand tools. For the 2006-2011 Cadillac DTS, the TCM is conveniently located in the right-hand (passenger side) front of the engine compartment.
- 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: Find the TCM on the RH side of the engine bay. It will have several large electrical connectors attached.
- Disconnect and Remove: Carefully unclip 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. Securely fasten the bolts and reconnect the wiring harnesses, ensuring they click into place.
- Final Steps: Reconnect the negative battery terminal. While our programming resolves most issues, it’s good practice to use a basic scan tool to clear any stored historical codes from other modules. Start the vehicle and enjoy restored shifting performance.
Verified Vehicle Compatibility
This T42 TCM is a direct-fit replacement for a wide range of General Motors vehicles. While this page is focused on the 2006-2011 DTS TCM, it is also compatible with many other popular models. Please verify your specific model and year from the list below. The location of the module is noted for your convenience.
- Cadillac DTS (2006-2011): Located in the RH front engine compartment.
- Chevrolet Impala (2006-2011): Found under the lower air cleaner housing.
- Buick Lucerne (2006-2011): Located in the LH engine compartment.
- Chevrolet Silverado 1500 (2007-2013): Typically found next to the battery (check for new/classic body style in ’07).
- GMC Sierra 1500 (2007-2013): Typically found next to the battery (check for new/classic body style in ’07).
- Chevrolet Tahoe / GMC Yukon (2007-2009): Located next to the battery.
- Hummer H3 (2008-2010): Found in the RH rear engine compartment.
Frequently Asked Questions
Do I need to have this module programmed by the dealer?
No. This module comes fully pre-programmed to your vehicle’s specific VIN. It is ready for installation right out of the box, saving you the time, cost, and hassle of a dealership visit.
Is this a reliable part?
Absolutely. Each module is built to meet or exceed OEM specifications and undergoes rigorous testing to ensure durability and proper function. We back it with a one-year warranty for your peace of mind.
What if I have a different part number on my old module?
This module replaces numerous GM service numbers, including 24242391, 24234503, 24252114, and your original 24230461. As long as your vehicle is on the compatibility list, this part will function correctly.
Do I need to send my old part back?
No, there is no core charge for this part. You can keep or dispose of your old module without any extra fees or hassle.