Restore the Smooth, Confident Performance of Your Cadillac
Is your 2006-2011 Cadillac DTS suffering from erratic shifting, a lit check engine light, or getting stuck in gear? These are classic signs of a failing Transmission Control Module (TCM). As the electronic brain of your automatic transmission, a faulty TCM can turn your luxury ride into a source of daily frustration. Over my 20+ years in automotive diagnostics, I’ve seen countless GM vehicles, including the DTS, sidelined by these exact issues. The problem often stems from internal circuit board failure due to heat cycles and vibration, leading to unpredictable transmission behavior.
This T42 TCM, part number 24235340, is the definitive solution. We pre-program it to your vehicle’s specific VIN, ensuring it works perfectly right out of the box. This eliminates the need for expensive dealership programming, saving you time and money. By precisely managing shift points, torque converter clutch engagement, and fluid pressure, this module restores the smooth, responsive shifting you expect from your Cadillac.
From the Diagnostic Bay: The Intermittent DTS Shifting Nightmare
A customer brought in a 2008 Cadillac DTS with a complaint that stumped two other shops: intermittent, bone-jarring shifts, but only after driving for 30 minutes. There were no hard codes, just a history P0700 (Transmission Control System Malfunction). We monitored live data and saw the TCM command signals become erratic as the module heated up. The internal processor was failing under thermal load. Swapping in a VIN-programmed T42 module like this one not only fixed the harsh shifting but also improved fuel economy, as the torque converter could now lock up correctly. It’s a textbook example of how a failing 2006-2011 DTS TCM can cause phantom issues that are hard to trace without experience.
Is Your Cadillac DTS Showing These Symptoms?
A failing TCM isn’t just an annoyance; it can affect vehicle safety and lead to more severe transmission damage if ignored. Here are the common red flags I look for during diagnosis:
- ✔ Unpredictable, harsh, or delayed gear shifts.
- ✔ Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear) 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 other transmission-related codes.
- ✔ The transmission refuses to upshift or downshift properly.
- ✔ A noticeable decrease in fuel efficiency.
- ✔ Complete loss of communication with the TCM, preventing diagnostics.
A Straightforward Guide to Installation
Replacing the TCM on your Cadillac DTS is a job most DIYers can handle in under 30 minutes with basic tools. This module is designed for a direct, plug-and-play fit.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and reset the system.
- Locate the Module: On the 2006-2011 Cadillac DTS, the TCM is typically found in the engine bay on the right-hand (passenger) side, near the front.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. Then, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Reconnect the wiring harness connectors, ensuring they click securely into place.
- Final Steps: Reconnect the battery terminal. While our programming handles the critical setup, it’s good practice to use a basic OBD2 scanner to clear any stored fault codes from the vehicle’s memory. Start the vehicle and enjoy your restored transmission performance!
Guaranteed Fitment for Your GM Vehicle
This T42 TCM (part 24235340) is a direct replacement for a wide range of General Motors vehicles. Please verify your model and location details below.
Cadillac DTS (2006-2011): Transmission; (RH front engine compartment)
Buick Lucerne (2006-2011): Transmission; (LH engine compartment)
Chevrolet Impala (2006-2011): Transmission; (lower air cleaner housing)
Chevrolet Silverado/GMC Sierra 1500 (2007-2013): Transmission; (next to battery)
… and many other GM cars, trucks, and SUVs from 2006-2014.
Frequently Asked Questions
Do I need to take my car to the dealer after installing this?
No. This 2006-2011 DTS TCM is delivered to you fully programmed to your vehicle’s VIN. It is a true plug-and-play solution, requiring no additional programming or setup at a dealership.
Is this a new or used part?
This is a high-quality, OEM-spec component that has been expertly tested and programmed to meet or exceed original factory standards. It comes with a one-year warranty for your peace of mind.
What does ‘No Core Charge’ mean?
It means you don’t have to send your old, faulty module back to us. This saves you the hassle and cost of return shipping and eliminates any core deposit fees.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer (ECM) to turn on the check engine light. If the underlying cause of the P0700 and other transmission codes is a faulty TCM, then yes, replacing it with this programmed module will resolve the issue.
What tools do I need for installation?
Typically, you’ll only need a basic socket set to remove the mounting bolts and a wrench for the battery terminal. No specialized electronic tools are required for the installation itself.