Restore Your Impala’s Drivability and Performance
If you’re dealing with the headaches of a faulty transmission in your 2006-2011 Chevrolet Impala—like unpredictable shifting, getting stuck in gear, or a persistent check engine light—you know how disruptive it can be. As a technician with over two decades of experience, I’ve seen countless GM vehicles sidelined by a failing Transmission Control Module (TCM). The TCM is the brain of your automatic transmission, and when it malfunctions, the entire system suffers. This VIN-programmed T42 TCM, part number 24239224, is the definitive solution to get your Impala driving smoothly and reliably again.
This isn’t just a replacement part; it’s a complete, ready-to-install fix. We pre-program the module to your vehicle’s specific VIN before shipping, which means you can skip the expensive trip to the dealership for programming. It arrives at your door ready for a plug-and-play installation, restoring the precise, factory-intended communication between your engine and transmission. By replacing your old, failing unit, you’re not just clearing codes—you’re correcting the root cause of poor fuel economy, harsh engagement, and potential long-term transmission damage.
Case Study: A Tricky Diagnosis
I remember a 2009 Impala that came into the shop with classic transmission symptoms: harsh 1-2 shifts and occasional slipping. The owner had already spent money replacing a couple of shift solenoids, but the problem persisted. After a quick scan, we saw a generic P0700 code, but digging deeper, we found intermittent communication errors with the TCM. The internal electronics of the original module were failing under heat, causing the erratic commands. We installed a VIN-programmed T42 module, and the car drove like new. It’s a powerful reminder that addressing the ‘brain’ is often the most effective and lasting repair.
Is Your Impala Showing These Telltale Signs?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indicator that your 2006-2011 Impala Transmission Module needs replacement:
- ✔ Harsh, erratic, or delayed gear shifts that make driving uncomfortable.
- ✔ The vehicle is stuck in “limp mode,” often refusing to shift out of 2nd or 3rd gear.
- ✔ An illuminated Check Engine Light or Transmission Warning Light on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700 (Transmission Control System Malfunction), P0750-series (Solenoid Faults), or other communication errors.
- ✔ A noticeable drop in fuel efficiency as the transmission operates inefficiently.
- ✔ Complete failure to shift, or the transmission feels like it’s slipping between gears.
A Straightforward Guide to Installation
One of the best features of this module is its simple installation. For the Chevy Impala, the process is straightforward enough for a confident DIYer to complete in their driveway in under an hour. No specialized tools are needed.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the Module: On the 2006-2011 Impala, the TCM is typically found inside or underneath the lower air cleaner housing in the engine bay.
- 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 Module: Mount the new, pre-programmed TCM in the same location and securely fasten it. Reconnect the electrical connectors, ensuring they click into place.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s good practice to use a basic OBD-II scan tool to clear any stored fault codes from the vehicle’s memory.
Verified Vehicle Compatibility
This T42 Transmission Control Module is a direct replacement for part number 24239224 and is compatible with a wide range of General Motors vehicles. While this page is focused on the 2006-2011 Impala Transmission Module, it also fits other models. Please verify your part number or consult the list below.
This part fits the following vehicles (and more):
- Chevrolet Impala: 2006-2011 (Transmission; lower air cleaner housing)
- Chevrolet Monte Carlo: 2006-2007 (Transmission; lower air cleaner housing)
- Buick Allure / LaCrosse: 2006-2009 (Transmission; lower air cleaner housing)
- Pontiac Grand Prix: 2006-2008 (Transmission; lower air cleaner housing)
- Chevrolet Cobalt & Pontiac G5/G6: 2006-2010 (Transmission; LH strut tower)
- …and many other GM cars, trucks, and SUVs from 2006-2014.
This module is interchangeable with service numbers such as 24252114, 24234503, 24230461, 24239926, and others.
Do I need to take this part to a dealer for programming?
Do I need to take this part to a dealer for programming?
No. We handle all the programming for you. Simply provide your vehicle’s VIN during checkout, and the module will arrive ready for plug-and-play installation, saving you time and money.
Is this a difficult part to install myself?
For a 2006-2011 Impala, the installation is considered easy to moderate. It’s located under the air filter box and requires only basic hand tools. Most DIY mechanics can complete the job in under 30-45 minutes.
What is a core charge? Do I need to send my old part back?
There is absolutely no core charge for this part. You can keep your old module or dispose of it without any obligation to return it to us, making the process hassle-free.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. In many cases, a faulty TCM is the cause of the P0700 code itself, as well as other related transmission codes. Replacing it with this programmed module is a very common and effective fix for these issues.