Restore Smooth, Reliable Shifting to Your Chevrolet Impala
If your 2006-2011 Chevrolet Impala is suffering from harsh shifts, getting stuck in gear, or throwing transmission codes, a failing Transmission Control Module (TCM) is the most likely culprit. As the electronic brain of your automatic transmission, the TCM is responsible for every gear change. When it fails, it can make your daily drive frustrating and unreliable. This direct-fit T42 Transmission Control Module, part number 24240449, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair.
A Technician’s Notebook: The Telltale Impala TCM Failure
I had a 2009 Impala roll into my bay last month. The customer was exasperated—the car would shift fine when cold, but after 15 minutes of driving, it would slam into gear and the check engine light would pop on. A quick scan revealed a P0700 (Transmission Control System Malfunction) and a P0752 (Shift Solenoid ‘A’ Stuck On). While the solenoid code points to a specific component, my experience with these platforms immediately made me suspect the TCM. Heat soak was causing an internal fault in the module, leading to erratic solenoid commands. We replaced the TCM with one of our VIN-programmed units, and the problem was solved instantly. The car shifted like new, proving that a faulty module can often mimic a mechanical failure.
Is Your Impala’s Transmission Showing These Signs?
A faulty TCM can manifest in several ways. If you’re experiencing any of the following, it’s time to consider a replacement:
- âś” Harsh, jerky, or delayed gear shifts.
- âś” Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- âś” The Check Engine Light or Transmission Warning Light is on.
- âś” Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750-P0758, or other solenoid-related faults.
- âś” A sudden drop in fuel economy.
- âś” The transmission feels like it’s slipping between gears.
A Straightforward Guide to Installation
Replacing the 2006-2011 Impala TCM is a job most DIYers can handle in their own driveway in under an hour. For the Impala, the module is conveniently located.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the Module: On the 2006-2011 Impala, the TCM is typically found bolted to the lower air cleaner housing in the engine bay.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. Then, unbolt the old module from its mounting bracket.
- Install the New TCM: Bolt the new, VIN-programmed module into place and securely reconnect the electrical harnesses. You should hear a click as they lock in.
- Final Steps: Reconnect the battery terminal. Start the vehicle and allow it to idle for a few minutes. While our programming handles the critical setup, it’s good practice to use a basic scan tool to clear any stored fault codes.
Confirmed Vehicle Compatibility
This T42 Transmission Control Module is a guaranteed fit for the 2006-2011 Impala TCM application and is also compatible with a wide range of other General Motors vehicles. Please verify your part number or contact us with your VIN to ensure a perfect match. Key compatible models include:
- Chevrolet Impala (2006-2011) – located at the lower air cleaner housing
- Chevrolet Monte Carlo (2006-2007)
- Chevrolet HHR (2006-2011)
- Chevrolet Cobalt (2006-2010)
- Pontiac G6 (2006-2010)
- Buick LaCrosse / Allure (2006-2009)
- Saturn Aura (2007-2009)
- And many other GM cars, trucks, and SUVs equipped with 4-speed automatic transmissions like the 4L60E & 4L65E.
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. It is a plug-and-play solution that requires no additional dealership visits, saving you time and money.
What is the benefit of VIN programming?
VIN programming ensures the module has the correct software and calibrations specifically for your Impala’s factory configuration. This guarantees correct shift points, torque converter operation, and communication with other vehicle systems for optimal performance and reliability right out of the box.
Is this part number 24240449 the same as other service numbers?
Yes, this module is interchangeable with a variety of GM service numbers, including 24252114, 24234503, 24239224, and others. Our programmed module covers all these variations.
Is there a core charge for my old part?
No, there is no core charge required. You can keep your old module without the hassle of returning it.
Will this fix a P0700 code?
A P0700 code is a general fault code indicating the TCM has detected a problem. In many cases, a failing TCM is the root cause. Replacing it with this pre-programmed unit is a very common and effective fix for this and related transmission codes.