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, the problem is very likely a failing Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen these T42 modules cause countless headaches for drivers. This isn’t just an annoyance; it’s a critical failure that can impact your vehicle’s safety and lead to more expensive transmission damage if ignored. This replacement 2006-2011 Impala TCM is the definitive solution, arriving pre-programmed to your vehicle’s VIN for a true plug-and-play repair.
Case Study: The 2009 Impala Stuck in Limp Mode
A customer brought in his ’09 Impala, completely frustrated. The car wouldn’t shift past 3rd gear, the check engine light was on, and another shop had quoted him over $2,000 for a transmission inspection. I pulled the codes and saw a P0700 (Transmission Control System Malfunction) and a few solenoid circuit codes. From experience, I knew these symptoms pointed directly to the TCM. Instead of a costly teardown, we installed a VIN-programmed module. In less than an hour, the car was shifting perfectly, all codes were cleared, and the customer saved a fortune. This is a common story, and the fix is often this simple.
Is Your Impala Exhibiting These Common TCM Failure Symptoms?
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear) to protect the transmission.
- ✔ The Check Engine Light or a transmission warning light is illuminated on your dash.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, P0753, P0758, or other solenoid-related faults.
- ✔ Complete loss of shifting capability or intermittent communication failure with the module.
- ✔ A noticeable drop in fuel economy due to inefficient shifting and torque converter operation.
Your 30-Minute Impala TCM Installation Guide
Replacing the TCM on your Impala is a straightforward job that most DIYers can handle with basic tools. The key is knowing where to look. For the 2006-2011 Impala, the module is located under the lower air cleaner housing.
- Safety First: Disconnect the negative terminal from your car’s battery to prevent any electrical shorts and to help reset the vehicle’s computer systems.
- Access the Module: Locate and remove the air cleaner box assembly. This will give you clear access to the TCM mounted below it.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old TCM. Note their orientation. Then, unbolt the module from its mounting bracket and remove it from the vehicle.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Reconnect the electrical harnesses securely, ensuring they click into place.
- Reassemble and Finalize: Reinstall the air cleaner housing. Reconnect the negative battery terminal. Use a basic OBD2 scan tool to clear any lingering fault codes from the vehicle’s memory. Start the car and take it for a test drive to confirm the shifting issues are resolved.
Verified Vehicle Compatibility
This T42 Transmission Control Module, part number 24243921, is a direct-fit replacement for a wide range of General Motors vehicles. While it is guaranteed to fit the 2006-2011 Chevrolet Impala, it also fits other popular models like the Chevy Monte Carlo, Buick LaCrosse, Pontiac Grand Prix, and more that share the same platform. The included VIN programming ensures it works seamlessly with your specific vehicle’s 4-speed automatic transmission (like the 4L60E or 4L65E) right out of the box.
Frequently Asked Questions About the Impala TCM
Do I need to take my car to a dealership for programming?
No. This module comes fully pre-programmed to your vehicle’s specific VIN. This saves you hundreds of dollars and the hassle of a dealer visit. It is ready for installation upon arrival.
Where is the TCM located on my 2007 Chevy Impala?
On the 2006-2011 Impala, the Transmission Control Module is located in the engine bay, underneath the lower air cleaner housing.
Will this fix a P0700 diagnostic code?
A P0700 code is a general fault code indicating the TCM has detected a problem. In a vast majority of cases I’ve diagnosed, replacing a faulty TCM with this part resolves the P0700 code and any related solenoid codes.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old part or dispose of it without the need to send it back, making the process faster and more convenient for you.
What kind of warranty is included?
This module is backed by our one-year, hassle-free warranty, giving you confidence and peace of mind in your repair.