Restore Your Impala’s Shifting with a Pre-Programmed Transmission Module
If your 2006-2011 Chevrolet Impala is suffering from harsh shifting, getting stuck in gear, or has an illuminated check engine light, a failing Transmission Control Module (TCM) is the most likely culprit. As a technician with over two decades of experience, I’ve seen these T42 modules cause countless headaches. This isn’t just a part; it’s the brain of your automatic transmission, and when it fails, it can make your reliable Impala feel unpredictable and unsafe. This replacement module, part number 24243901, is the definitive solution, arriving pre-programmed to your vehicle’s VIN for a hassle-free, plug-and-play installation.
A Technician’s Notebook: The Misleading Solenoid Code
A customer brought in an ’08 Impala with a classic complaint: erratic shifting and the car was stuck in 3rd gear (limp mode). The scan tool showed a P0753 code, pointing to a ‘Shift Solenoid A Electrical’ fault. A less experienced mechanic would immediately replace the solenoid inside the transmission—a costly, time-consuming job. However, having seen this hundreds of times, I checked the TCM first. The internal drivers on these T42 modules are a known failure point. They lose the ability to properly command the solenoids, which triggers the code. We installed a VIN-programmed 2006-2011 Impala Transmission Module, cleared the codes, and the car shifted perfectly. The solenoid was never the problem; the TCM was. This part saves you from an expensive and unnecessary internal transmission repair.
Is Your Impala Showing These Telltale Signs?
A failing TCM doesn’t heal itself; it only gets worse. Ignoring these symptoms can lead to permanent transmission damage. Check if your vehicle is experiencing any of the following:
- ✔ Abrupt, harsh, or jerky gear changes.
- ✔ The vehicle feels like it’s stuck in one gear (often called “limp mode”).
- ✔ A lit Check Engine Light or Transmission Warning Light with codes like P0700, P0750, P0753, or other solenoid-related faults.
- ✔ Failure to upshift or downshift correctly, leading to poor acceleration.
- ✔ A noticeable drop in fuel economy as the transmission operates inefficiently.
- ✔ Complete loss of communication with the module, preventing diagnostics.
DIY Installation: Get Your Impala Shifting Smoothly in Minutes
One of the best features of this module is that you can install it yourself without needing a trip to the dealership. For the 2006-2011 Impala, the process is straightforward.
- Safety First: Disconnect the negative terminal from your car’s battery to prevent any electrical shorts and to help reset the system.
- Locate the TCM: On your Impala, the TCM is typically found bolted to the lower air cleaner housing in the engine bay. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unclip the wiring harness connectors. Then, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed 2006-2011 Impala Transmission Module into place. Securely reconnect the wiring harnesses—they should click into place.
- Final Steps: Reconnect the negative battery terminal. Start the vehicle and let it idle for a minute. While the module is plug-and-play, it’s always a good practice to use a basic OBD2 scanner to clear any stored fault codes from the computer’s memory.
Verified Vehicle Compatibility
This T42 TCM is a direct-fit replacement for your 2006-2011 Chevrolet Impala. It is also compatible with a wide range of other GM vehicles that use the same module, including the Monte Carlo, Buick LaCrosse, Pontiac Grand Prix, and more. It interchanges with numerous part numbers, including 24252114, 24234503, and 24243901, ensuring you get the right part for the job. By providing your VIN at checkout, we guarantee it will be programmed with the latest GM software for your specific vehicle, ensuring flawless communication and performance from the moment you plug it in.
Frequently Asked Questions
Do I need to take my car to the dealer for programming?
No. This module comes fully programmed to your vehicle’s VIN number. It is a true plug-and-play solution, saving you the time and expense of a dealership visit.
What tools are required for installation on an Impala?
You’ll only need basic hand tools. A socket set to remove the bolts holding the module and potentially the air cleaner housing, and a wrench to disconnect the battery terminal is typically all that’s required. The entire job usually takes less than 30 minutes.
Is there a core charge for my old part?
No, there is no core charge. You are not required to send your old, faulty module back to us, which simplifies the repair process for you.
Will this fix a P0700 trouble code?
Yes, in many cases it will. 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 is a failing TCM, replacing it with this programmed unit will resolve the root problem and allow the code to be cleared permanently.
What if I have questions during installation?
We have a team of experienced experts ready to help. If you run into any issues or have questions, our customer support is here to provide the guidance you need to get the job done right.