Is Your 2006-2011 Chevy Impala Shifting Erratically?
If you’re experiencing frustrating transmission problems like harsh gear changes, delayed engagement, or your Impala is stuck in ‘limp mode,’ a failing Transmission Control Module (TCM) is the most likely cause. The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every shift with precision. When it fails, it can disrupt your entire driving experience and illuminate your check engine light. This replacement GM T42 TCM, part number 24255280, is the definitive solution to restore your vehicle’s performance and reliability.
From the Diagnostic Bay
We had a 2009 Impala come into the shop with a classic complaint: ‘It bangs into gear and sometimes won’t shift past 2nd.’ The owner had already spent money replacing a couple of shift solenoids based on a generic code reader’s output, but the problem persisted. After a quick scan with our professional equipment, we saw communication errors pointing directly to the TCM. The internal circuitry had failed, sending faulty signals. We installed one of our VIN-programmed T42 modules, cleared the codes, and the car shifted like it just left the showroom. It’s a textbook example of how targeting the root cause with the right part saves time and money.
Common Symptoms of a Failing Impala TCM
- ✔️ Harsh, erratic, or delayed shifting that makes driving uncomfortable.
- ✔️ Vehicle gets stuck in a single gear (limp mode) to prevent further damage.
- ✔️ The check engine light or transmission warning light is on, often with codes like P0700 or P0750.
- ✔️ Inability to upshift or downshift, leading to poor acceleration and high RPMs.
- ✔️ A noticeable decrease in fuel economy as the transmission operates inefficiently.
- ✔️ Intermittent loss of communication with the module, causing unpredictable behavior.
The Ultimate Solution: A Pre-Programmed 2006-2011 Impala Transmission Control Module
Don’t let a faulty module sideline your vehicle. Our T42 TCM is the most effective and straightforward repair. We take an OEM-quality module and pre-program it specifically to your Impala’s Vehicle Identification Number (VIN). This critical step ensures that the module has the latest GM software and is perfectly calibrated for your vehicle’s specific transmission, engine, and tire size. The result is a true plug-and-play installation that eliminates the need for an expensive trip to the dealership for programming.
This module is a direct replacement for a wide range of original part numbers, including 24252114, 24234503, 24230461, and 24255280. By installing this part, you are not just fixing a symptom; you are restoring the core logic of your transmission for long-term dependability.
Installation is Simpler Than You Think
For the 2006-2011 Chevrolet Impala, the TCM is conveniently located in the engine bay, situated in the lower air cleaner housing. The replacement process can typically be completed in under 30 minutes with basic hand tools. Simply disconnect the battery, remove the air cleaner assembly to access the old module, unplug the electrical connectors, swap it with your new pre-programmed unit, and reconnect everything. Once installed, clear any stored diagnostic trouble codes (DTCs) with a scan tool for a fresh start. Best of all, there is no core charge—you can keep or dispose of your old part without any hassle.
Frequently Asked Questions
What does this TCM do in my 2006-2011 Impala?
The Transmission Control Module (TCM) acts as the computer for your automatic transmission. It processes data from various sensors to control shift points, torque converter clutch engagement, and line pressure, ensuring smooth and efficient operation.
What does ‘VIN Programmed’ mean and why is it important?
‘VIN Programmed’ means we load the module with the specific software and calibrations for your vehicle using your unique VIN. This makes it a plug-and-play part, ensuring perfect communication with your car’s other computers and eliminating the need for additional programming at a dealership.
Will this module fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause of a P0700, it’s essential to scan for other transmission-specific codes (like solenoid or sensor codes) to confirm the TCM is the faulty component.
Can I install this part myself?
Yes, this is a very DIY-friendly repair for those with basic mechanical skills. On the Impala, the TCM is located under the air cleaner box. The process involves disconnecting the battery, removing the air box, and swapping the module. It typically takes less than an hour.
Is there a core charge for this part?
No, we do not require a core charge. You are not required to send your old, faulty module back to us, which simplifies the process for you.