If your 2006-2007 Chevrolet Monte Carlo is suffering from erratic shifting, getting stuck in gear, or has an illuminated check engine light, you’re likely dealing with a failing Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen how a faulty TCM can sideline an otherwise perfectly good car. This isn’t just an annoyance; it’s a reliability issue. This T42 series TCM, part number 24240449, is the definitive, hassle-free solution to restore your vehicle’s transmission performance and get you back on the road with confidence.
Case Study: A Tricky Diagnosis
A customer brought in their ’07 Monte Carlo complaining of it suddenly refusing to shift past 2nd gear—a classic limp mode symptom. The check engine light was on, and a quick scan pulled a P0700 (Transmission Control System Malfunction) and a few solenoid circuit codes. While some shops might start by throwing expensive solenoids at the problem, my experience pointed straight to the TCM. These T42 modules, especially after years of heat cycles under the hood, are notorious for internal circuit failure. We replaced it with one of our VIN-programmed units, and the car was shifting perfectly within the hour. The customer saved hundreds compared to a dealership repair and avoided unnecessary parts replacements.
Is Your Monte Carlo Showing These Transmission Red Flags?
A failing TCM doesn’t always mean total transmission failure. Often, the signs are subtle at first. Here’s what to look for:
- ✔ Harsh, clunky, or delayed gear shifts.
- ✔ The vehicle is stuck in a single gear (limp mode), often 2nd or 3rd.
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-related faults.
- ✔ Unexplained drops in fuel economy.
- ✔ The transmission seems to slip out of gear or struggles to engage Drive or Reverse.
Why Choose Our Programmed 2006-2007 Monte Carlo TCM?
This isn’t just a replacement part; it’s a complete solution. The biggest hurdle with electronic modules is the need for expensive dealership programming. We eliminate that step entirely. By providing your vehicle’s VIN at checkout, we flash the module with the latest GM-approved software specific to your Monte Carlo. It arrives at your door ready for a true plug-and-play installation, ensuring perfect communication between your engine and transmission from the moment it’s connected.
Your Straightforward 30-Minute Installation Guide
You don’t need to be a master mechanic to install this part. For the 2006-2007 Monte Carlo, the process is simple.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the Old TCM: On your Monte Carlo, the TCM is typically found under the lower air cleaner housing in the engine bay. You’ll need to remove the airbox to access it.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical harnesses. You’ll hear a click when they’re seated correctly.
- Final Steps: Reinstall the air cleaner housing and reconnect the battery terminal. Start the vehicle to confirm the fix. We recommend using a basic OBD2 scanner to clear any stored fault codes.
Verified to Fit These GM Models
While this is the specified part for your Monte Carlo, this T42 TCM is also compatible with a wide range of other GM vehicles. Please verify your part number (24240449 or an interchange) for a guaranteed match.
- Chevrolet: Monte Carlo (06-07), Impala (06-11), Cobalt (06-10), HHR (06-11), Silverado, Tahoe, Express Van, and more.
- Pontiac: G6 (06-10), Grand Prix (06-08), Pursuit (06), and more.
- Buick: LaCrosse (06-09), Allure (06-09), Lucerne (06-11), and more.
- GMC: Sierra, Yukon, Savana Van, Canyon, and more.
- Saturn: Aura (07-09), Ion (06-07), Vue (07-10), and more.
- This is a partial list. Please confirm fitment for your specific vehicle and options.
Do I need to take this part to a dealer for programming?
Do I need to take this part to a dealer for programming?
No. This is the key benefit of our service. We pre-program the module to your vehicle’s VIN before shipping. It is ready for installation right out of the box, saving you time and money.
Is this a difficult part to install myself?
Not at all. For a 2006-2007 Monte Carlo, it’s a straightforward DIY job that typically takes less than 30 minutes with basic hand tools. The module is located under the air cleaner housing.
What if my part number is slightly different?
This T42 TCM (24240449) interchanges with many other GM service numbers like 24252114, 24234503, and others listed in the product details. As long as your original part is a T42-style module, this will be the correct replacement.
Does this part come with a warranty?
Yes, it comes with our standard one-year, hassle-free warranty. We stand behind the quality and reliability of our programmed electronics.