Restore the Smooth, Luxurious Ride of Your Cadillac DTS
Is your 2006-2011 Cadillac DTS no longer shifting with the refinement you expect? If you’re dealing with harsh gear changes, hesitation, or a check engine light that points to the transmission, the culprit is often a failing Transmission Control Module (TCM). As the electronic brain of your automatic transmission, a faulty TCM can disrupt communication, causing a host of drivability issues that detract from your car’s performance and reliability. In my 20+ years as a technician, I’ve seen countless GM vehicles, including the DTS, sidelined by these exact symptoms. The solution is often simpler and more affordable than a trip to the dealership.
This T42 Transmission Control Module, corresponding to part number 24230461, is the definitive fix for these problems. We take the guesswork and extra cost out of the repair by pre-programming it to your vehicle’s specific VIN. This means it arrives ready for a true plug-and-play installation, with no need for expensive dealer-only scan tools or software flashing. Restore your Cadillac’s precise, smooth shifting and get back to enjoying the drive.
A Technician’s Notebook: The Intermittent Limp Mode Mystery
A customer brought in their 2009 Cadillac DTS with a frustrating complaint: it would randomly get stuck in 3rd gear (limp mode) and throw a generic P0700 transmission fault code. They’d already spent money at another shop replacing a shift solenoid, but the problem persisted. After confirming the solenoids were functioning correctly, my diagnostic process led me to the TCM. These modules can suffer from internal circuit board failures due to heat and vibration, causing intermittent communication loss. We installed one of our VIN-programmed TCMs, and the problem was solved in under an hour. The customer saved hundreds on dealership diagnostic fees and avoided unnecessary parts replacement.
Is Your DTS Exhibiting These Telltale Signs of TCM Failure?
A failing transmission computer can manifest in several ways. If you’re noticing any of the following, it’s a strong indicator that your 2006-2011 DTS TCM needs attention:
- ✔ Jarring, abrupt, or delayed gear shifts that ruin your smooth ride.
- ✔ The vehicle is stuck in a single gear (often called “limp mode”) to protect the transmission.
- ✔ An illuminated Check Engine Light or Transmission Warning Light on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-specific faults are stored.
- ✔ A noticeable drop in fuel economy as the transmission isn’t operating efficiently.
- ✔ The transmission feels like it’s slipping, or the engine revs high without accelerating properly.
A Straightforward Guide to Installation
One of the best features of this module is its ease of installation. For the Cadillac DTS, you can have this job done in your own garage in about 30 minutes with basic hand tools.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic component replacement.
- Locate the Module: On the 2006-2011 Cadillac DTS, the TCM is conveniently located in the engine bay, on the right-hand (passenger side) front.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Then, unbolt the module from its mounting bracket and remove it from the vehicle.
- Install the New TCM: Mount your new, pre-programmed module onto the bracket and securely reconnect the electrical connectors. You should hear a click as they lock 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 old fault codes from the vehicle’s memory. Start the car and enjoy restored performance!
Verified Vehicle Compatibility
While this is the correct module for the 2006-2011 Cadillac DTS, this versatile T42 TCM also fits a wide array of other General Motors vehicles. Please verify your part number and vehicle model below.
- Cadillac: DTS (2006-2011) – Located in RH front engine compartment.
- Buick: Allure (06-09), LaCrosse (06-09), Lucerne (06-11), Rainier (06-07), Rendezvous (06-07)
- Chevrolet: Avalanche 1500 (07-08), Cobalt (06-10), Colorado (08-12), Express Vans (06-14), HHR (06-11), Impala (06-11), Malibu (06-10), Monte Carlo (06-07), Silverado Pickups (07-13), SSR (05-06), Suburban 1500 (07-08), Tahoe (07-09)
- GMC: Canyon (08-12), Envoy / Envoy XL (06-09), Savana Vans (06-14), Sierra Pickups (07-13), Yukon / Yukon XL 1500 (07-08)
- Hummer: H3 (08-10)
- Pontiac: G5 (07-10), G6 (06-10), Grand Prix (06-08), Pursuit (06)
- Saab: 9-7X (06-09)
- Saturn: Aura (07-09), Ion (06-07), Vue (07-10)
Frequently Asked Questions
What exactly is VIN programming and why do I need it?
VIN programming involves loading your vehicle’s unique 17-digit Vehicle Identification Number (VIN) and the latest GM software onto the module before we ship it. This ensures the TCM communicates perfectly with your car’s engine computer and other systems, just like the original part. It eliminates the need for a dealership visit, saving you time and money.
Is this a difficult part to install for a DIYer?
Not at all. For the Cadillac DTS, the TCM is easily accessible in the engine compartment. With basic hand tools and our step-by-step guide, most people can complete the replacement in under 30 minutes. It’s one of the more straightforward electronic repairs you can do.
Do I need to return my old TCM? Is there a core charge?
No, there is absolutely no core charge for this part. You can keep your old module or dispose of it at your convenience without any extra hassle or fees.
Will this part fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer, indicating a problem exists within the transmission’s control system. While a faulty TCM is a very common cause for this code, it can also be triggered by other issues like bad solenoids or wiring. However, if you are also experiencing shifting problems, replacing the 2006-2011 DTS TCM is a highly effective solution.
What is the warranty on this module?
This transmission control module comes with a one-year, unlimited mileage warranty, giving you peace of mind and confidence in your repair.