Restore Smooth Shifting to Your 2006-2007 Chevy Monte Carlo
If you’re dealing with the frustration of a transmission that slams into gear, refuses to shift, or has your 2006-2007 Monte Carlo stuck in limp mode, you’ve likely pinpointed the culprit: a failing Transmission Control Module (TCM). As the electronic brain of your automatic transmission, the T42 TCM is responsible for every shift command. When it fails, drivability suffers, fuel economy plummets, and warning lights appear on your dash. This isn’t just an annoyance; it’s a critical failure that needs a reliable solution.
This OEM-quality T42 TCM, part number 24255280, is the definitive fix for these common issues. We take the guesswork and high dealership costs out of the equation. Before shipping, we program the module to your vehicle’s specific VIN, ensuring it arrives ready for a true plug-and-play installation. No expensive scan tools or trips to the dealer are required for programming. This is the same high-quality component that manages the 4L60E/4L65E transmission in your vehicle, designed to restore the crisp, predictable performance you expect.
A Technician’s Notebook
I recently had a 2007 Monte Carlo SS in the shop with a classic T42 failure. The customer reported harsh 1-2 shifts and an intermittent P0758 code (Shift Solenoid B Electrical). After verifying the solenoid itself had proper resistance and the wiring was intact, all signs pointed to the driver circuit inside the TCM. Instead of sending the customer to the dealership for a costly replacement and programming session, we installed one of our pre-programmed modules. The installation, located right under the air cleaner box, took less than 20 minutes. After a quick battery disconnect to reset adaptations, the car shifted perfectly. It’s a textbook repair that saves customers hundreds and gets them back on the road with confidence.
Is Your Monte Carlo Showing These Transmission Faults?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, this module is your likely solution:
- âś” Harsh, erratic, or delayed gear shifting.
- âś” Vehicle is stuck in a single gear (often called “limp mode”).
- âś” Check Engine Light or Transmission Warning Light is illuminated.
- âś” Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0753, P0758, or other solenoid-related faults.
- âś” Complete loss of upshifting or downshifting capabilities.
- âś” A noticeable decrease in fuel efficiency.
- âś” Intermittent communication loss with the TCM.
A Straightforward Guide to Installation
Installing your new 2006-2007 Monte Carlo TCM is a job most DIY enthusiasts can handle in their own garage. For the Monte Carlo, the module is conveniently located under the lower air cleaner housing.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Access the Module: Remove the air cleaner box assembly to gain clear access to the old TCM.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Then, unbolt the module from its mounting bracket and remove it from the vehicle.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical connectors. You should hear a click as they lock in.
- Final Steps: Reinstall the air cleaner assembly and reconnect the battery terminal. Start the vehicle and allow it to idle for a few minutes. While not always necessary, using a basic scan tool to clear any stored fault codes is good practice.
Verified Vehicle Compatibility
This module is a direct replacement for part number 24255280 and other service numbers on a wide range of GM vehicles. While this page is focused on the Monte Carlo, it also fits the following models:
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 06-09 Transmission; (LH engine compartment)
ENVOY XL 06 Transmission; (LH engine compartment), (8 cylinder)
EXPRESS 1500 VAN 06-14 Transmission; (RH engine compartment)
EXPRESS 2500 VAN 06-14 Transmission; (RH engine compartment)
EXPRESS 3500 VAN 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)
MONTANA 06-09 Transmission; (LH strut tower)
MONTE CARLO 06-07 Transmission; (lower air cleaner housing)
PURSUIT 06 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 1500 VAN 06-14 Transmission; (RH engine compartment)
SAVANA 2500 VAN 06-14 Transmission; (RH engine compartment)
SAVANA 3500 VAN 06-14 Transmission; (RH engine compartment)
SIERRA 1500 PICKUP 07-13 Transmission; (next to battery)
SIERRA 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (next to battery)
SILVERADO 1500 PICKUP 07-13 Transmission; (next to battery)
SILVERADO 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (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)
TRAILBLAZER EXT 06 Transmission; (LH engine compartment), (8 cylinder)
UPLANDER 06-09 Transmission; (LH strut tower)
VUE 07-10 Transmission
YUKON 07-09 Transmission; (next to battery)
YUKON XL 1500 07-08 Transmission; (next to battery)
Frequently Asked Questions
Do I need to get this module programmed by a dealer?
No. This is the biggest benefit of our service. We program the module to your car’s VIN before it ships, so it’s ready to install right out of the box. This saves you time and money.
Where is the TCM located on my 2006-2007 Monte Carlo?
On the 06-07 Monte Carlo, the Transmission Control Module is located in the engine bay, mounted underneath the lower air cleaner housing.
Will this fix my transmission that is stuck in 2nd or 3rd gear?
Yes, being stuck in one gear (limp mode) is a very common symptom of a failed TCM. Replacing it with this pre-programmed unit is the correct repair for that issue, provided the transmission’s internal mechanical parts are sound.
Is there a core charge for my old part?
No, we do not require you to send back your old module. There is no core charge, making the process simpler for you.
What kind of warranty is included?
This module comes with a one-year warranty, giving you peace of mind and confidence in your repair.