Restore Peak Performance to Your Chevrolet Impala
Is your 2006-2011 Chevrolet Impala suffering from harsh shifting, getting stuck in gear, or displaying a check engine light with transmission codes? These are classic symptoms of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating smooth gear changes, managing torque converter lockup, and monitoring overall transmission health. When it fails, it can lead to poor performance, decreased fuel economy, and even leave you stranded. This genuine GM T42 TCM, service part number 24240400, is the definitive solution to get your Impala driving like new again.
From the Diagnostic Bay
We recently had a 2009 Impala towed to the shop, stuck in what the owner called ‘limp mode’—it wouldn’t shift out of 3rd gear. The dashboard was lit up with a check engine light, and a quick scan pulled a P0700 (Transmission Control System Malfunction) code. The owner had already spent money replacing a shift solenoid with no success. We knew from experience that on these vehicles, the internal logic of the TCM itself is often the culprit. We installed one of our pre-programmed T42 modules matched to the car’s VIN, cleared the codes, and the Impala was shifting flawlessly on the test drive. This isn’t just a part; it’s a permanent fix for a very common problem.
Symptoms of a Failing 2006-2011 Impala TCM
- ✔ Unpredictable or harsh shifting, including banging or jerking into gear.
- ✔ The vehicle feels sluggish and refuses to upshift or downshift correctly.
- ✔ Your Impala is stuck in a single gear (limp mode) to prevent further damage.
- ✔ The Check Engine Light or a specific transmission warning light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related codes are stored.
- ✔ A noticeable drop in fuel efficiency due to improper gear management.
- ✔ Complete failure to engage a gear from Park or Neutral.
Why Our Pre-Programmed TCM is the Superior Choice
This isn’t just a generic replacement part. Each module is expertly programmed to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This critical step ensures that the TCM has the correct software and calibration for your Impala’s specific configuration, including its engine, axle ratio, and tire size. This VIN programming makes the module a true plug-and-play component, eliminating the need for an expensive and time-consuming trip to the dealership for programming. Simply install it, and you’re ready to go.
Installation Guide for Your Chevrolet Impala
Replacing the TCM on a 2006-2011 Impala is a straightforward job for a DIY mechanic. The module is typically located under the lower air cleaner housing in the engine bay.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Access the Module: Remove the air cleaner box assembly to gain clear access to the TCM.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical connectors.
- Final Steps: Reinstall the air cleaner assembly and reconnect the battery. It’s recommended to use a basic OBD2 scan tool to clear any stored transmission codes after installation is complete.
With no core charge, you can complete the repair without the hassle of returning your old, faulty part. This module is a direct replacement for multiple service numbers, including 24252114, 24234503, 24230461, and more, ensuring wide compatibility across the GM platform.
Frequently Asked Questions
VIN (Vehicle Identification Number) programming loads your car’s specific software and calibrations onto the module. Without it, the TCM won’t communicate correctly with the engine and other vehicle systems, leading to persistent shifting problems. Our pre-programming makes this a true plug-and-play part, saving you a trip to the dealer.
Do I need to return my old module?
No. We do not require you to send back your old part. There is no core charge associated with this purchase, making the process faster and more convenient for you.
Is this compatible with transmissions other than the one in my Impala?
Yes, this T42 TCM is compatible with a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. It fits models like the Chevrolet Tahoe, Silverado, GMC Sierra, Buick LaCrosse, and many others from 2006-2014, making it a versatile and reliable OEM-quality part.
What tools are needed for installation?
Basic hand tools are all that’s required, such as a socket set and screwdrivers to remove the air cleaner housing and unbolt the module. An OBD2 scan tool is highly recommended to clear codes after the installation is complete.
What kind of warranty is included?
This transmission control module comes with a one-year warranty, giving you peace of mind and confidence in the quality and durability of your repair.