Restore the Luxury Ride of Your Cadillac DTS
Is your 2006-2011 Cadillac DTS suffering from erratic shifting, getting stuck in gear, or throwing transmission codes? A faulty Transmission Control Module (TCM) is one of the most common culprits behind these frustrating and potentially damaging issues. As a technician with over two decades of experience, I’ve seen how a failing TCM can make a premium vehicle feel unreliable. This isn’t just an inconvenience; it’s a critical failure that compromises performance and safety. This direct-fit T42 TCM, part number 24256960, 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
A customer brought in a 2008 Cadillac DTS with classic signs of a failing transmission—harsh 1-2 shifts and occasionally getting stuck in 3rd gear (limp mode). They were quoted over $3,000 for a transmission rebuild at another shop. After pulling the codes, I saw a P0700 (Transmission Control System Malfunction) and an intermittent solenoid circuit code. Instead of jumping to the most expensive conclusion, I inspected the TCM. On these GM vehicles, heat and vibration are the enemy of electronics. We swapped in a VIN-programmed TCM, cleared the codes, and the car drove like it just left the showroom. A 30-minute fix saved the customer thousands and restored their confidence in their car. This is why addressing the 2006-2011 DTS TCM first is my standard procedure for these symptoms.
Is Your Cadillac Exhibiting These Transmission Issues?
A failing TCM sends clear warning signs. If you’re experiencing any of the following, it’s time to diagnose your module. Ignoring these symptoms can lead to more severe mechanical damage to your transmission.
- ✔ Harsh, delayed, or unpredictable gear shifts.
- ✔ Vehicle is stuck in “limp mode” and won’t shift out of a single gear.
- ✔ The Check Engine Light or Transmission Warning Light is on.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-related faults.
- ✔ A noticeable drop in fuel economy due to inefficient shifting.
- ✔ Complete loss of communication with the transmission module.
A Straightforward Guide to Installation
One of the best features of this module is that it’s designed for a straightforward installation, saving you time and money on labor. For the 2006-2011 Cadillac DTS, the TCM is located in the engine bay, making it easily accessible.
- 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 Cadillac DTS, you’ll find the TCM in the right-hand (passenger side) front engine compartment.
- Disconnect and Remove: Carefully unclip the wiring harness connectors. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount your new, VIN-programmed TCM onto the bracket and securely reconnect the wiring harnesses. Ensure they click into place.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s best practice to use a standard OBD2 scan tool to check for and clear any stored fault codes. Start the vehicle and take it for a test drive to confirm smooth shifting.
Verified Fitment For These GM Models
This T42 TCM is a direct replacement for a wide range of General Motors vehicles. While this page focuses on the 2006-2011 DTS TCM, it is also compatible with the following models. Please verify the location noted for your specific vehicle.
- 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, LH engine compartment)
- Chevrolet Silverado / Tahoe / Suburban (2007-2013): Transmission; (next to battery)
- GMC Sierra / Yukon (2007-2013): Transmission; (next to battery)
- Pontiac G6 / Grand Prix (2006-2010): Transmission; (LH strut tower or lower air cleaner housing)
- …and many other GM models listed in the full fitment data. This part is interchangeable with numbers like 24252114, 24234503, 24242391, and more.
Frequently Asked Questions
What does ‘VIN Programmed’ mean for my Cadillac?
It means we load your vehicle’s unique 17-digit Vehicle Identification Number (VIN) onto the module before shipping. This ensures it has the correct software and calibration for your specific DTS, making it ready for installation without requiring expensive dealer tools.