Restore Smooth Shifting in Your Chevrolet Monte Carlo
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 these T42 modules cause headaches for countless owners. A faulty TCM doesn’t just affect performance; it compromises your car’s reliability and your peace of mind. This isn’t a problem you can ignore. It’s the electronic brain of your transmission, and when it fails, your car’s drivability suffers dramatically.
We offer a direct, reliable solution: a high-quality T42 Transmission Control Module, part number 24240449, that comes fully programmed to your vehicle’s specific VIN. This means no expensive trips to the dealership for programming. It’s a true plug-and-play fix designed to get your Monte Carlo back to shifting smoothly and efficiently, just like it did from the factory.
A Technician’s Notebook: The Intermittent Shifting Nightmare
A customer brought in their ’07 Impala (which shares the same platform and TCM as the Monte Carlo) with a frustrating issue. They reported random, harsh 1-2 shifts and occasional slipping out of gear at highway speeds, but with no consistent check engine light. My initial scan showed a stored history code, P0750 (Shift Solenoid A Malfunction), but the solenoid itself tested fine. After checking the wiring harness for damage, I suspected the TCM. These T42 modules can develop internal circuit faults from heat and vibration, causing them to send erratic commands to the solenoids. We installed one of our VIN-programmed modules, and the problem vanished instantly. The car shifted perfectly on the test drive, proving the original TCM was the culprit. This is a classic failure I’ve diagnosed hundreds of times.
Is Your Monte Carlo Exhibiting These Symptoms?
A failing TCM will give you clear warning signs. If you’re experiencing any of the following, it’s time to consider a replacement:
- ✔ Harsh, jerky, or delayed gear shifts.
- ✔ Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- ✔ Check Engine Light or Transmission Warning Light is on.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-related codes.
- ✔ The transmission refuses to upshift or downshift properly.
- ✔ A noticeable drop in fuel economy.
- ✔ Complete loss of communication with the transmission module.
Your Solution: A Pre-Programmed 2006-2007 Monte Carlo TCM
This isn’t just a replacement part; it’s a complete fix. By programming the module to your VIN before shipping, we ensure it has the correct software and calibrations for your specific vehicle. This eliminates communication errors and ensures all transmission functions, like torque converter lockup and shift pressure, operate exactly as GM intended. Built to strict OEM standards and backed by a one-year warranty, this module is the dependable choice for both DIY enthusiasts and professional repair shops.
DIY-Friendly Installation in Under 30 Minutes
You don’t need to be a master mechanic to install this part. For the 2006-2007 Monte Carlo, the TCM is conveniently located, making for a quick swap.
- Safety First: Always disconnect the negative terminal from your car’s battery before starting any electrical work.
- Locate the Module: On your Monte Carlo, the TCM is typically found underneath the lower air cleaner housing. You will need to remove the airbox to gain access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old TCM. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely plug in the electrical connectors. Reinstall the air cleaner housing.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s always good practice to use a basic scan tool to clear any old fault codes stored in other vehicle systems.
Verified Vehicle Compatibility List
This T42 TCM, part number 24240449, is a direct fit for a wide range of General Motors vehicles. While this page is focused on the Monte Carlo, please confirm your model is on the list below. The location notes can help you find it on your specific car or truck.
- ALLURE 06-09 Transmission; (lower air cleaner housing)
- AVALANCHE 1500 07-08 Transmission; (next to battery)
- CANYON 08-12 Transmission; (RH rear engine compartment)
- COBALT 06-10 Transmission; (LH strut tower)
- COLORADO 08-12 Transmission; (RH rear engine compartment)
- DTS 06-11 Transmission; (RH front engine compartment)
- ENVOY 06-07 Transmission; (LH engine compartment), (8 cylinder)
- ENVOY 08-09 Transmission; (LH engine compartment)
- EXPRESS VANS (1500/2500/3500) 06-14 Transmission; (RH engine compartment)
- G5 07-10 Transmission; (LH strut tower)
- G6 06-10 Transmission; (LH strut tower)
- GRAND PRIX 06-08 Transmission; (lower air cleaner housing)
- HHR 06-11 Transmission; (LH engine compartment)
- HUMMER H3 08-10 Transmission; (RH rear engine compartment)
- IMPALA 06-11 Transmission; (lower air cleaner housing)
- ION 06-07 Transmission; (behind LH strut tower)
- LACROSSE 06-09 Transmission; (lower air cleaner housing)
- LUCERNE 06-11 Transmission; (LH engine compartment)
- MALIBU 06-10 Transmission; (LH frame rail)
- MONTE CARLO 06-07 Transmission; (lower air cleaner housing)
- MONTANA 06-09 Transmission; (LH strut tower)
- RAINIER 06-07 Transmission
- RENDEZVOUS 06-07 Transmission; (air cleaner box)
- SAAB 9-7X 06-09 Transmission; (LH engine compartment)
- SAVANA VANS (1500/2500/3500) 06-14 Transmission; (RH engine compartment)
- SIERRA PICKUPS (1500/2500) 07-13 Transmission; (next to battery)
- SILVERADO PICKUPS (1500/2500) 07-13 Transmission; (next to battery)
- SSR 05-06 Transmission; (front LH frame)
- SUBURBAN 1500 07-08 Transmission; (next to battery)
- TAHOE 07-09 Transmission; (next to battery)
- TERRAZA 06-07 Transmission; (LH strut tower)
- TRAILBLAZER 06-09 Transmission; (LH engine compartment)
- UPLANDER 06-09 Transmission; (LH strut tower)
- VUE 07-10 Transmission; (LH front engine compartment)
- YUKON & YUKON XL 1500 07-09 Transmission; (next to battery)
Frequently Asked Questions
What exactly is VIN programming?
VIN programming is the process where we load your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM-certified software onto the TCM before we ship it. This ensures the module communicates perfectly with your car’s engine computer and other systems, guaranteeing correct shift patterns and performance without any additional setup.
Do I need to take this part to a dealer after installation?
No. The main benefit of our service is that the module arrives ready to install. Since it’s already programmed, you avoid the hassle and expense of a dealership visit for software flashing.
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 yourself, saving you the time and money of shipping a core back to us.
What is the warranty on this TCM?
This transmission control module is backed by our comprehensive one-year warranty, giving you confidence in the quality and durability of your repair.