Restore Smooth Shifting to Your Chevrolet Impala
If your 2006-2011 Chevrolet Impala is suffering from harsh shifting, getting stuck in gear, or has an illuminated check engine light, a failing Transmission Control Module (TCM) is the most likely cause. As the electronic brain of your automatic transmission, the TCM is responsible for every gear change. When it fails, it can mimic a catastrophic transmission failure, leading to expensive and unnecessary repair quotes. This direct-fit T42 TCM, corresponding to part number 24239926, is the definitive solution to restore your vehicle’s performance and reliability.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We pre-program each module to your vehicle’s specific VIN, ensuring it communicates flawlessly with your car’s other systems right out of the box. This critical step eliminates the need for a costly trip to the dealership for programming, saving you time, money, and frustration. For professional mechanics and DIY enthusiasts alike, this means a faster, more efficient repair.
Case Study: A Tricky Diagnosis
I remember a 2009 Impala that came into the shop with classic symptoms: it would slam into gear from a stop and refused to shift past 3rd gear on the highway. The owner was convinced his 4L60E transmission was shot and was bracing for a multi-thousand-dollar bill. After plugging in my scanner, I saw a generic P0700 (Transmission Control System Malfunction) and a specific code for a shift solenoid circuit. Instead of jumping to conclusions, I checked the TCM connectors and wiring first—all clean. The root cause? Internal failure within the original 2006-2011 Impala TCM. A quick swap with one of our VIN-programmed modules had the car shifting like new in under an hour, saving the customer from a needless transmission replacement.
Is Your Impala Exhibiting These Transmission Issues?
- ✔ Harsh, erratic, or delayed gear shifts that make driving uncomfortable.
- ✔ The vehicle is stuck in “limp mode,” often locked in 2nd or 3rd gear.
- ✔ Check Engine Light or Transmission Warning Light is on with codes like P0700, P0750, or other solenoid-related DTCs.
- ✔ Complete failure to upshift or downshift, leading to poor acceleration and high RPMs.
- ✔ A noticeable drop in fuel economy due to inefficient shifting.
- ✔ Intermittent loss of communication with the TCM, causing unpredictable behavior.
Get Back on the Road: A 30-Minute Installation Guide
Installing your new 2006-2011 Impala TCM is a straightforward process you can complete with basic hand tools. For the Impala, the module is conveniently located under the air cleaner housing.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the vehicle’s computer systems.
- Access the Module: Remove the engine cover and the air cleaner assembly. You will see the TCM mounted below it.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old TCM. Then, unbolt the module from its mounting bracket and remove it from the vehicle.
- Install the New TCM: Mount your new, pre-programmed TCM onto the bracket and securely plug in the electrical connectors. You should hear a click as they lock into place.
- Reassemble and Finalize: Reinstall the air cleaner assembly and engine cover. Reconnect the negative battery terminal. Start the vehicle and use a basic OBD2 scan tool to clear any stored trouble codes.
Verified Vehicle Compatibility List
While this module is a perfect fit for the 2006-2011 Chevrolet Impala, it is also compatible with a wide range of other GM vehicles. Please verify your specific model and location below.
- IMPALA 06-11 Transmission; (lower air cleaner housing)
- LACROSSE 06-09 Transmission; (lower air cleaner housing)
- ALLURE 06-09 Transmission; (lower air cleaner housing)
- GRAND PRIX 06-08 Transmission; (lower air cleaner housing)
- MONTE CARLO 06-07 Transmission; (lower air cleaner housing)
- COBALT 06-10 Transmission; (LH strut tower)
- G5 07-10 Transmission; (LH strut tower)
- G6 06-10 Transmission; (LH strut tower)
- HHR 06-11 Transmission; (LH engine compartment)
- ION 06-07 Transmission; (behind LH strut tower)
- MALIBU 06-10 Transmission; (LH frame rail)
- AURA 07-09 Transmission; (LH frame rail front)
- LUCERNE 06-11 Transmission; (LH engine compartment)
- DTS 06-11 Transmission; (RH front engine compartment)
- SILVERADO 1500 PICKUP 07-13 Transmission; (next to battery)
- SIERRA 1500 PICKUP 07-13 Transmission; (next to battery)
- TAHOE 07-09 Transmission; (next to battery)
- YUKON 07-09 Transmission; (next to battery)
- EXPRESS VAN 1500/2500/3500 06-14 Transmission; (RH engine compartment)
- SAVANA VAN 1500/2500/3500 06-14 Transmission; (RH engine compartment)
- And many more…
Frequently Asked Questions
What does VIN programming mean for me?
It means your new TCM arrives ready for installation with no extra steps. We load your car’s specific VIN and the latest GM software onto the module before shipping, so you can skip the expensive programming fees and wait times at a dealership. It’s a true plug-and-play fix.
Will this fix a P0700 trouble code on my Impala?
Yes, in many cases. A P0700 code is a general fault code indicating the TCM has detected a problem. It’s often accompanied by more specific codes. If the root cause is a faulty TCM, replacing it with our pre-programmed module will resolve the issue and allow you to clear the codes permanently.
Where is the TCM located on a 2008 Impala?
On the 2006-2011 Chevrolet Impala, the Transmission Control Module (TCM) is located in the engine bay, directly underneath the air cleaner box assembly. You’ll need to remove the airbox to access it.
Do I need to return my old TCM?
No, there is no core charge for this part. You can keep your old module without any extra fees or hassle, making the repair process simpler and more convenient for you.
Is this a difficult part to replace myself?
Not at all. For someone with basic mechanical skills, this is a very manageable job that typically takes less than 30 minutes. The location is accessible, and no specialized tools are required beyond a basic socket set.