Restore Smooth Shifting to Your Chevrolet Monte Carlo
If you’re dealing with the headaches of a failing transmission control module in your 2006-2007 Chevrolet Monte Carlo, you know how frustrating it can be. One minute your car is driving fine, the next it’s stuck in gear, shifting harshly, or throwing a check engine light that won’t go away. As a technician with over two decades of experience, I’ve seen countless GM vehicles sidelined by faulty TCMs. This isn’t just an inconvenience; it’s a critical failure that impacts your car’s performance, safety, and fuel economy. This T42 Transmission Control Module, part number 24243901, is the definitive solution, arriving pre-programmed to your vehicle’s VIN for a true plug-and-play repair.
A Technician’s Notebook: The Monte Carlo That Wouldn’t Shift
A few months back, a 2007 Monte Carlo SS was towed into the shop. The owner was at his wit’s end. The car would randomly slam into gear, and sometimes it felt like it was starting in 3rd gear from a stoplight (a classic sign of limp mode). He’d already replaced a couple of shift solenoids, but the problem persisted. We hooked up the scanner and saw a generic P0700 (Transmission Control System Malfunction) code. Digging deeper, we found intermittent communication errors with the TCM. Instead of a clear solenoid failure, the brain itself was glitching. This is a common failure pattern I’ve seen in hundreds of these T42 modules due to heat cycles and internal circuit board degradation. We installed one of our VIN-programmed modules, and the car was shifting like new within an hour. It’s a perfect example of why just chasing codes isn’t enough; you need a reliable core component to solve the root problem.
Is Your Monte Carlo Exhibiting These Transmission Woes?
A failing 2006-2007 Monte Carlo TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement:
- ✔ Harsh, erratic, or delayed gear shifts that make driving uncomfortable.
- ✔ Vehicle is stuck in “limp mode,” usually locked in 2nd or 3rd gear.
- ✔ The Check Engine Light or a dedicated transmission warning light is on.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-related faults.
- ✔ A noticeable drop in fuel efficiency or signs of the transmission overheating.
- ✔ Complete loss of communication with the module, leading to a no-shift condition.
Plug-and-Play Installation: A Straightforward Guide
One of the biggest advantages of this module is that it eliminates the need for an expensive trip to the dealership for programming. The installation is simple enough for a seasoned DIYer. For the 2006-2007 Monte Carlo, you’ll find the TCM located under the lower air cleaner housing.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the Module: Remove the air cleaner assembly to gain access to the TCM, which is mounted below it.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount the new module securely onto the bracket and firmly reconnect the electrical connectors until they click into place.
- Final Steps: Reinstall the air cleaner assembly and reconnect the battery terminal. While the module is pre-programmed, it’s good practice to use a basic scan tool to clear any stored DTCs from the vehicle’s memory.
Verified Vehicle Compatibility
This T42 TCM is a direct replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. While this listing is focused on the 2006-2007 Monte Carlo TCM, it is also compatible with the following models. Please verify your specific model and location before ordering.
- CHEVROLET MONTE CARLO (2006-2007): Transmission; (lower air cleaner housing)
- CHEVROLET IMPALA (2006-2011): Transmission; (lower air cleaner housing)
- BUICK LACROSSE / ALLURE (2006-2009): Transmission; (lower air cleaner housing)
- PONTIAC GRAND PRIX (2006-2008): Transmission; (lower air cleaner housing)
- CHEVROLET COBALT / HHR (2006-2011): Transmission; (LH engine compartment or strut tower)
- GMC SIERRA / CHEVROLET SILVERADO (2007-2013): Transmission; (next to battery)
- GMC YUKON / CHEVROLET TAHOE (2007-2009): Transmission; (next to battery)
- And many more GM models from 2006-2014. See full list for details.
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean?
It means we load your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM software onto the module before shipping. This ensures it communicates perfectly with your car’s engine computer and other systems right out of the box, with no additional programming required.
Do I need any special tools for this installation?
No special tools are required. Basic hand tools like a socket set and screwdrivers are all you should need to access and replace the module on a Monte Carlo.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old part or dispose of it without the hassle of needing to send it back to us.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. In many cases where the module itself is the cause of the fault, replacing it with our programmed unit will resolve the P0700 and any related codes. However, you should always ensure other components like solenoids and wiring are in good condition.
What if I install it and still have problems?
Our modules are backed by a one-year warranty and expert support. If you encounter any issues, contact us immediately. Our technicians can help diagnose whether the issue might be with another part of the transmission system or assist with a warranty claim if the module is found to be faulty.