Restore Your Impala’s Shifting Performance
Is your 2006-2011 Chevrolet Impala suffering from harsh shifting, delayed gear engagement, or a frustrating check engine light? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for managing shift points, torque converter lockup, and fluid pressure. When it malfunctions, it can mimic the symptoms of a catastrophic transmission failure, leading to incorrect diagnoses and costly, unnecessary repairs. This genuine GM T42 Transmission Control Module, part number 24241806, is the definitive solution to restore your vehicle’s drivability and peace of mind.
The Plug-and-Play Solution: Pre-Programmed for Your Vehicle
One of the biggest hurdles in replacing modern automotive electronics is the need for expensive dealership programming. We eliminate that step entirely. Each module is expertly programmed to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This ensures that the module communicates flawlessly with your Impala’s engine computer and other systems right out of the box. It arrives loaded with the latest GM software updates, guaranteeing optimal performance, fuel efficiency, and transmission longevity. Simply install the part, and you’re ready to drive—no extra tools or trips to the mechanic required.
From the Diagnostic Bay
We had a 2008 Impala come into the shop with the check engine light on and the transmission stuck in 3rd gear (limp mode). The owner had already been quoted over $2,500 for a transmission rebuild at another shop. After pulling the codes, we saw a P0700 and several solenoid circuit fault codes. Instead of jumping to conclusions, we checked the TCM wiring and connections. Everything looked fine. Knowing these T42 modules are a common point of failure, we suggested starting there. We installed a VIN-programmed module, cleared the codes, and took it for a test drive. The car shifted perfectly through all gears, smooth as the day it left the factory. A simple module replacement saved the customer thousands of dollars and a week of downtime.
Common Symptoms of a Failing 2006-2011 Impala TCM
If you’re experiencing any of the following issues, a faulty TCM is the most likely culprit. Replacing it can resolve these problems and prevent further damage to your transmission’s mechanical components.
- ✔ Harsh, erratic, or delayed shifting between gears.
- ✔ Vehicle gets stuck in one gear (often called ‘limp mode’).
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related codes are present.
- ✔ A sudden drop in fuel economy.
- ✔ The transmission feels like it’s slipping or failing to engage properly.
- ✔ Complete loss of communication with the transmission module.
Installation and Compatibility
This module is a direct replacement for a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. For the 2006-2011 Chevrolet Impala, the TCM is typically located under the hood, attached to the lower air cleaner housing, making it accessible for a straightforward installation that can be completed in under an hour with basic hand tools. This part is interchangeable with numerous service numbers, including 24252114, 24234503, 24242391, and more, ensuring a perfect match for your vehicle’s needs.
Frequently Asked Questions
What is VIN programming and why is it essential?
VIN programming loads your vehicle’s specific software and operational parameters onto the module. This ensures it communicates correctly with the engine computer and other vehicle systems, controlling shift strategies and diagnostics precisely as the manufacturer intended. Without it, the module will not function.
Is this part difficult to install on my 2006-2011 Impala?
No, the installation is relatively simple for a DIY mechanic. On the Impala, the TCM is found under the air cleaner box. You’ll need to disconnect the battery, remove the air cleaner assembly, unplug the electrical connectors from the old module, unbolt it, and then install the new one in reverse order. No special tools are required.
Will this module fix a P0700 trouble code?
A P0700 code is a generic code that simply means the TCM has detected a fault and has requested the Check Engine Light be turned on. In many cases, the fault is internal to the TCM itself. Replacing a faulty TCM will clear the P0700 and any related transmission codes (like solenoid circuit faults) that it was causing.
What happens if I continue driving with a bad TCM?
Continuing to drive with a failing TCM can cause long-term damage. Poor shifting can lead to excessive wear on clutches and bands inside the transmission, while incorrect fluid pressure can cause overheating. What starts as an electronic issue can quickly become a major mechanical failure, so it’s best to address it promptly.
Is there a core charge for this part?
No, there is no core charge for this module. You can keep your old part without needing to send it back, saving you time and hassle.