Restore Smooth Shifting to Your Chevrolet Impala
If your 2006-2011 Chevrolet Impala is suffering from erratic 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 seasoned technician, I’ve seen countless GM vehicles, especially the Impala, come into the shop with these exact issues. The T42 TCM, part number 24256960, is the electronic brain of your automatic transmission. It governs everything from shift timing to torque converter clutch engagement. When it fails, your car’s drivability and reliability are severely compromised.
This isn’t just a replacement part; it’s a complete, hassle-free solution. We pre-program each module to your vehicle’s specific VIN, ensuring it works perfectly right out of the box. This eliminates the need for expensive and time-consuming programming at a dealership, making it an ideal fix for both DIY enthusiasts and professional repair shops. By installing our VIN-programmed 2006-2011 Impala TCM, you’re not just clearing codes—you’re restoring the precise, factory-intended performance of your transmission.
A Technician’s Notebook: The Telltale Impala TCM Failure
I remember a 2009 Impala that was towed to my bay. The customer was frustrated, explaining the car would suddenly refuse to shift out of what felt like 3rd gear (a classic ‘limp mode’ symptom) and the check engine light was on. A quick scan revealed code P0700 (Transmission Control System Malfunction) and a few solenoid-specific codes. In these Impalas, the TCM is located under the air cleaner housing—a spot where it’s constantly exposed to engine heat cycles. Over years, this thermal stress causes internal circuit board failures. We confirmed power and ground were good, pointing directly to a failed module. Swapping in a pre-programmed T42 TCM like this one had the car shifting perfectly in under an hour. It’s one of the most common and satisfying fixes on this platform.
Is Your Impala Exhibiting These Transmission Faults?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement:
- âś” Harsh, slamming shifts or delayed gear engagement.
- âś” Vehicle is stuck in one gear (often 2nd or 3rd) and will not upshift or downshift.
- âś” Check Engine Light or Transmission Warning Light is illuminated.
- âś” Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-related faults.
- âś” A noticeable decrease in fuel economy.
- âś” The transmission seems to slip between gears or feels unresponsive.
DIY-Friendly Installation Guide for Your Impala
Replacing the 2006-2011 Impala TCM is a straightforward job that most DIYers can complete in their own driveway. For the Impala, the module is conveniently located directly under the air cleaner housing.
- Safety First: Disconnect the negative terminal from your car’s battery to prevent any electrical shorts and to help reset the system.
- Access the Module: Remove the engine cover and the air cleaner assembly. This will expose the TCM mounted below it.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old TCM. Then, unbolt the module from its mounting bracket and remove it from the vehicle.
- Install the New TCM: Mount your new, pre-programmed TCM onto the bracket and securely plug in the electrical connectors. You should hear a ‘click’ as they lock into place.
- Reassemble and Finalize: Reinstall the air cleaner assembly and engine cover. Reconnect the negative battery terminal. Start the vehicle to confirm the fix. We recommend using a basic scan tool to clear any stored fault codes after installation.
Verified Vehicle Compatibility
This T42 TCM is a direct-fit replacement for the 2006-2011 Chevrolet Impala. It is also compatible with a wide range of other GM vehicles that use the 4L60E, 4L65E, and similar 4-speed automatic transmissions. It interchanges with part numbers including 24252114, 24234503, 24242391, and others. Please verify your part number or contact us with your VIN to ensure perfect fitment.
Frequently Asked Questions
Do I need to have this TCM programmed by a dealer?
No. This module comes fully pre-programmed to your vehicle’s VIN. It is a true plug-and-play solution, saving you a trip to the dealership and additional programming fees.
What is a TCM and what does it do?
The Transmission Control Module (TCM) is a computer that controls your automatic transmission’s functions. It reads data from various sensors to determine the optimal time to shift gears, engage the torque converter, and regulate fluid pressure for smooth and efficient operation.
Is there a core charge for this part?
No, there is no core charge. You can keep your old part without any extra hassle or cost.
Will this fix a P0700 trouble code?
Yes, in most cases. A P0700 code indicates a general fault in the transmission control system. If the root cause is a failing TCM, replacing it with this unit will resolve the code and the underlying shifting issues.
What kind of warranty is included?
This part is backed by our one-year, hassle-free warranty, giving you confidence and peace of mind in your repair.