Get Your 2006-2011 Impala Shifting Smoothly Again
If your Chevrolet Impala is suffering from harsh shifting, getting stuck in gear, or throwing transmission codes, you’ve likely pinpointed the culprit: a failing Transmission Control Module (TCM). As the electronic brain of your automatic transmission, the TCM is responsible for every gear change. When it fails, it can mimic a major mechanical problem, but the fix is often much simpler. This T42 Transmission Control Module is the direct, reliable solution for your 2006-2011 Impala TCM, pre-programmed to your vehicle’s VIN for a true plug-and-play repair.
Over my 20+ years in the shop, I’ve seen countless GM vehicles, especially sedans like the Impala and Malibu, come in with shifting complaints that stump other mechanics. Drivers are often told they need a costly transmission rebuild when the real issue is a faulty TCM. This module, part number 24238856, is engineered to OEM specifications to restore the precise, factory-fresh shifting performance you’ve been missing. Don’t let a small electronic part sideline your car—get the right fix the first time.
A Technician’s Notebook: The Case of the Hesitant Impala
A customer brought in his 2009 Impala, complaining it would slam into gear from a stop and sometimes refuse to shift past 2nd gear, triggering the Check Engine light. His scan tool showed a generic P0700 (Transmission Control System Malfunction) and a specific code for a shift solenoid. He had already replaced the solenoid with no change, a common and frustrating mistake. I explained that the TCM is what commands that solenoid. After a quick check of the wiring, we confirmed the TCM itself was the source of the intermittent electrical faults. By installing a VIN-programmed 2006-2011 Impala TCM, we resolved all the codes and restored smooth shifting in under an hour, saving him from an unnecessary and expensive internal transmission repair.
Is Your Impala’s TCM Failing?
A faulty TCM can cause a wide range of symptoms that are often misdiagnosed. If you’re experiencing any of the following, this module is your likely solution:
- âś” Harsh, jerky, or delayed gear shifts.
- âś” Vehicle is stuck in “limp mode” (usually second or third gear).
- âś” Check Engine Light or Transmission Warning Light is on.
- âś” Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0755, or other solenoid-related codes are present.
- âś” The transmission won’t upshift or downshift correctly.
- âś” A noticeable decrease in fuel economy.
- âś” Intermittent loss of communication with the scan tool.
Your Straightforward 30-Minute Installation Guide
One of the best features of this module is its ease of installation. For the 2006-2011 Impala, the TCM is conveniently located. You don’t need a vehicle lift or specialized tools.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and help reset the system.
- Locate the Module: On your Impala, the TCM is typically found under the lower air cleaner housing in the engine bay. You may need to remove the airbox to access it.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old TCM. 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. You’ll hear a click when they are properly seated.
- Final Steps: Reinstall the air cleaner housing and reconnect the battery terminal. Start the vehicle and allow it to idle for a few minutes. While not always necessary, using a basic scan tool to clear any stored codes is good practice.
Verified Vehicle Compatibility
This T42 TCM, also known by service numbers 24242391, 24252114, and 24234503, is a direct replacement for a wide array of General Motors vehicles. While this listing is focused on the 2006-2011 Impala TCM, it also fits:
- Chevrolet: Cobalt, HHR, Malibu, Monte Carlo, Silverado, Tahoe, Express Van
- Buick: LaCrosse, Lucerne, Allure
- Pontiac: G5, G6, Grand Prix
- GMC: Sierra, Yukon, Savana Van, Canyon
- Saturn: Aura, Ion, Vue
- And many more models. Please verify the part number or use our vehicle selector to confirm an exact match.
Frequently Asked Questions
What does “VIN Programmed” actually mean for me?
It means we load your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM software onto the module before shipping it. This ensures it communicates perfectly with your car’s engine computer and other systems right out of the box, eliminating the need for an expensive programming service at a dealership.
Do I need any special tools to install this TCM?
No. For a Chevy Impala, you’ll only need basic hand tools like a socket set to remove the air cleaner housing and unbolt the module. The entire process typically takes less than 30 minutes.
Will this part fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. Often, the problem is the TCM itself. If your diagnosis points to a faulty module, replacing it with this part is the correct procedure to clear the P0700 and any related transmission codes.
Is there a core charge for my old part?
No, there is absolutely no core charge. You can keep your old part or recycle it at your convenience without the hassle of shipping it back to us.
How is this different from a part from the local auto parts store?
Standard parts store modules are sold blank, meaning you still have to take your vehicle to a shop or dealer for costly programming. Our TCM arrives ready for installation, saving you significant time, money, and hassle.