Is Your 2006-2011 Chevrolet Impala Shifting Erratically?
If you’re dealing with harsh gear changes, delayed engagement, or a check engine light that won’t go away, a failing Transmission Control Module (TCM) is likely the culprit. The TCM is the electronic brain of your Impala’s automatic transmission, responsible for orchestrating every shift with precision. When it starts to fail, it can cause a cascade of frustrating and potentially damaging issues, from poor fuel economy to being stuck in limp mode. Don’t let a faulty module sideline your vehicle. This direct-fit, VIN-programmed T42 TCM is the definitive solution to restore your transmission’s performance and your driving confidence.
From the Diagnostic Bay
We recently had a 2009 Impala owner come in, completely frustrated. He’d already replaced two shift solenoids trying to fix a persistent P0756 code (Shift Solenoid B Performance/Stuck Off). The transmission would slam into gear intermittently. After checking the wiring and confirming the new solenoids were good, we tested the output from the original TCM. The signal to that specific solenoid was weak and inconsistent. The problem wasn’t a mechanical part inside the transmission; it was the electronic controller. We installed one of our VIN-programmed T42 modules, and the car shifted perfectly on the first test drive. This saved the owner from an unnecessary and expensive transmission teardown.
Symptoms of a Failing 2006-2011 Impala TCM
A failing TCM can manifest in various ways. If you notice any of the following signs, it’s time to inspect your module. Ignoring these symptoms can lead to more severe transmission damage over time.
- ✔ Harsh or Erratic Shifting: Gears may slam into place, or the transmission might hesitate and hunt for the right gear.
- ✔ Stuck in Gear / Limp Mode: The vehicle may refuse to shift out of a single gear (often 2nd or 3rd) to protect the transmission from further damage.
- ✔ Illuminated Warning Lights: The Check Engine Light or a specific transmission warning light will often appear on the dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): You may find codes like P0700 (Transmission Control System Malfunction) or other solenoid-specific codes (P0750, P0751, etc.) when using a scan tool.
- ✔ Delayed Engagement: A noticeable delay when shifting from Park into Drive or Reverse.
- ✔ Poor Fuel Economy: Inefficient shifting and torque converter lock-up issues caused by the faulty module can lead to a sudden drop in MPG.
The Plug-and-Play Solution: VIN Programming Included
Dealerships will often sell you a blank module that requires expensive programming and calibration. Our T42 TCMs eliminate that step entirely. We pre-program each module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This ensures that it arrives ready for immediate installation, loaded with the latest GM software updates for your Impala. It’s a true plug-and-play fix that restores factory performance without the need for specialized tools or a trip to the dealer.
Installation is Simple
For the 2006-2011 Chevrolet Impala, the TCM is conveniently located under the lower air cleaner housing in the engine bay. The replacement process is straightforward for a DIY mechanic and typically takes less than an hour.
- Safety First: Disconnect the negative terminal on your vehicle’s battery.
- Access the Module: Remove the air cleaner box assembly to gain clear access to the TCM.
- Swap the Modules: Carefully disconnect the electrical connectors and unbolt the old module. Bolt the new module in its place and securely reconnect the connectors.
- Reassemble: Reinstall the air cleaner box and reconnect the battery.
- Final Steps: Start the vehicle. Although the module is programmed, it’s good practice to use a basic scan tool to clear any stored fault codes from the vehicle’s memory.
This module is a direct replacement for multiple GM part numbers, including 24234274, 24252114, 24234503, and 24242391. It’s built to meet or exceed OEM specifications, ensuring long-lasting reliability for your vehicle. Get your Impala back on the road and shifting like new.
Frequently Asked Questions
Does this module require any additional programming?
No. This Transmission Control Module comes pre-programmed to your vehicle’s VIN. It is ready for installation right out of the box, with no need for a trip to the dealership or a special scan tool for programming.
Where is the TCM located on my 2006-2011 Chevy Impala?
On this specific model and year range, the TCM is located in the engine compartment, situated under the lower air cleaner housing. You will need to remove the airbox to access it.
Will this TCM fix a P0700 trouble code?
A P0700 code is a general fault code indicating that the TCM has detected a problem and has requested the check engine light to be turned on. While this module can resolve the underlying issue causing the P0700, it’s crucial to scan for other transmission-specific codes (e.g., P07xx) to pinpoint the exact fault. Often, replacing a faulty TCM will clear the P0700 and related codes.
Is this compatible with other GM vehicles?
Yes, this T42 TCM is compatible with a wide range of GM vehicles from 2006-2014 that use a 4-speed automatic transmission like the 4L60E or 4L65E. This includes models like the Chevrolet Silverado, Tahoe, Cobalt, GMC Sierra, Buick LaCrosse, and Pontiac G6, among others.
Do I need to send back my old TCM?
No, there is no core charge for this part. You can keep your old module, eliminating the hassle and expense of return shipping.