Restore Your Monte Carlo’s Smooth Shifting Performance
If you’re dealing with the frustration of a transmission that won’t shift correctly, bangs into gear, or has put your 2006-2007 Chevrolet Monte Carlo into 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 gear change. When it fails, drivability suffers dramatically. This replacement T42 TCM, part number 24256960, is the definitive solution, arriving expertly programmed to your vehicle’s specific VIN for a true plug-and-play repair.
From the Diagnostic Bay: A Monte Carlo’s Second Chance
I recently had a 2007 Monte Carlo roll into my shop that had its owner completely stumped. The car would shift hard from 1st to 2nd, but only when warm. On other days, it would get stuck in 3rd gear, and the check engine light was on with a P0700 (Transmission Control System Malfunction) code. The owner had already replaced a shift solenoid with no luck. After connecting my scan tool, I could see erratic data coming from the TCM. These intermittent electrical faults are classic signs of internal failure in the T42 module. Instead of a costly and time-consuming trip to the dealer, we installed one of our VIN-programmed modules. The entire job took less than 30 minutes, and on the test drive, the car shifted like it just left the factory. This part saved the customer hundreds in diagnostic and programming fees.
Is Your Monte Carlo Exhibiting These Transmission Issues?
A faulty TCM can manifest in several ways. If you’re noticing any of the following, it’s a strong indicator that your module needs replacement. This 2006-2007 Monte Carlo TCM is designed to correct these exact problems.
- ✔ Harsh, erratic, or delayed gear shifts that make driving uncomfortable.
- ✔ Vehicle is stuck in a single gear (often called “limp mode”) and will not upshift or downshift.
- ✔ Check Engine Light or Transmission Warning Light is illuminated on your dash.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-related codes.
- ✔ A noticeable drop in fuel economy due to inefficient shifting.
- ✔ Complete loss of communication with the transmission module, leading to a no-start or no-shift condition.
A Straightforward Guide to Your TCM Installation
One of the best features of this module is its simple installation. You don’t need to be a master mechanic to get this job done right in your own garage. For the 2006-2007 Monte Carlo, the process is particularly accessible.
- Safety First: Begin by disconnecting the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the Module: On your Monte Carlo, the TCM is conveniently located under 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 and remove it from the vehicle.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Reconnect the electrical connectors, making sure they click securely into position.
- Reassemble and Finalize: Reinstall the air cleaner housing. Reconnect the battery terminal. While the module is plug-and-play, it’s good practice to use a basic OBD2 scan tool to clear any stored transmission codes.
Verified Vehicle Fitment
This T42 Transmission Control Module is a direct replacement for part number 24256960 and is compatible with a wide array of General Motors vehicles. While this page focuses on the 2006-2007 Monte Carlo TCM, it also fits the following models. Always confirm your part number or contact us with your VIN.
- Chevrolet: Monte Carlo (06-07), Impala (06-11), Silverado, Tahoe, Suburban, Avalanche, Express, HHR, Cobalt, Colorado
- GMC: Sierra, Yukon, Savana, Canyon, Envoy
- Buick: LaCrosse (06-09), Lucerne (06-11), Allure, Rainier, Rendezvous
- Pontiac: G6 (06-10), Grand Prix (06-08), G5, Pursuit
- Cadillac: DTS (06-11)
- Saturn: Vue, Aura, Ion
- Hummer: H3 (08-10)
- Saab: 9-7X (06-09)
Frequently Asked Questions
Do I need to have this TCM programmed by a dealer?
No. The main benefit of our service is that we program the module to your car’s specific VIN before shipping. This means it arrives ready for installation, saving you the time, cost, and hassle of a dealership visit.
What information do you need to program the module?
We require your vehicle’s 17-digit Vehicle Identification Number (VIN) to ensure a perfect match. You can typically find your VIN on the driver’s side dashboard (visible through the windshield) or on the driver’s side door jamb sticker.
Is this a reliable, long-term fix?
Absolutely. This module is built to meet or exceed OEM specifications for performance and durability. It addresses the common failure points of the original T42 TCMs and is backed by our one-year warranty for your peace of mind.
Will this part fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. In a vast majority of cases where the TCM itself is the source of the electrical fault, replacing it with this programmed unit will resolve the P0700 code and any related transmission codes.
Is there a core charge for my old part?
No, there is no core charge. You are not required to send your old, faulty module back to us, which simplifies the repair process for you.