Restore Your Impala’s Shifting Performance
If your 2006-2011 Chevrolet Impala is suffering from harsh shifting, getting stuck in gear, or throwing transmission codes, a failing Transmission Control Module (TCM) is the most likely culprit. As an automotive diagnostician with over two decades of experience, I’ve seen how a faulty TCM can make a reliable car feel unpredictable and unsafe. This T42 series TCM, part number 24252114, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair.
This module acts as the brain for your automatic transmission, controlling everything from shift points to torque converter clutch engagement. When it fails, communication breaks down, leading to the frustrating symptoms you’re experiencing. Our VIN programming service eliminates the need for an expensive trip to the dealership for calibration. We load the latest GM software onto the module before it ships, ensuring it works perfectly with your Impala’s systems right out of the box.
A Technician’s Notebook: The P0700 Puzzle
A customer brought in a 2009 Impala with a check engine light and a complaint of it “banging” into gear. The scan tool showed a P0700 (Transmission Control System Malfunction) and a P0752 (Shift Solenoid A Stuck On). Many shops would immediately replace the solenoid, which is an internal transmission repair. However, after 20 years in the business, I know that on these GM platforms, the TCM itself is often the root cause. Electrical spikes from a failing module can mimic solenoid failure. We installed a pre-programmed 2006-2011 Impala TCM, cleared the codes, and the car shifted like new. The customer avoided a costly and unnecessary internal transmission repair by addressing the true source of the problem first.
Is Your Impala Exhibiting These Transmission Woes?
- ✔ Harsh, erratic, or delayed gear shifts.
- ✔ The vehicle is stuck in “limp mode,” often in 2nd or 3rd gear.
- ✔ Check Engine Light or Transmission Warning Light is on.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750-P0758, or other solenoid-related codes.
- ✔ Failure to upshift or downshift, leading to poor acceleration.
- ✔ Decreased fuel economy and potential for transmission overheating.
Your 30-Minute Path to a Smooth Ride
For the Chevy Impala, this is a straightforward job for any DIY enthusiast. You’ll have your car back to normal in less than half an hour with basic hand tools.
- Safety First: Disconnect the negative terminal from your car’s battery to prevent any electrical shorts and to help reset the vehicle’s adaptive memory.
- Locate the TCM: On the 2006-2011 Impala, the TCM is conveniently located under the lower air cleaner housing in the engine bay. You will need to remove the air cleaner assembly to access it.
- 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 harnesses. Ensure they click into place.
- Final Steps: Reinstall the air cleaner assembly and reconnect the battery. While the module is plug-and-play, it’s always best practice to use a basic OBD2 scan tool to clear any stored fault codes after the repair.
Verified Vehicle Compatibility
This T42 TCM is a direct-fit replacement for a wide range of General Motors vehicles. While this page is focused on the 2006-2011 Impala TCM, it is also compatible with the following models. Please verify your specific model and location before ordering.
- Chevrolet: Impala (06-11), Monte Carlo (06-07), HHR (06-11), Cobalt (06-10), Malibu (06-10), Silverado, Tahoe, Express Van, and more.
- Pontiac: G6 (06-10), Grand Prix (06-08), G5 (07-10)
- Buick: LaCrosse (06-09), Lucerne (06-11), Allure (06-09)
- GMC: Sierra, Yukon, Savana Van, Canyon, Envoy
- Saturn: Vue (07-10), Aura (07-09), Ion (06-07)
- Cadillac: DTS (06-11)
- …and other models listed in the full fitment data.
Frequently Asked Questions
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean?
It means we flash the module with the specific calibration file for your vehicle using your VIN before we ship it. This makes the unit truly plug-and-play, saving you a trip to the dealership and the $150+ programming fee they typically charge.