Restore Smooth, Reliable Shifting to Your Chevrolet Cobalt
Is your 2006-2010 Chevrolet Cobalt suffering from harsh shifting, getting stuck in gear, or throwing transmission-related check engine light codes? These are classic signs of a failing Transmission Control Module (TCM). As the electronic brain of your automatic transmission, a faulty TCM can make your daily drive frustrating and unpredictable. This T42 TCM, corresponding to part number 24241806, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair that restores factory performance and reliability.
From the Diagnostic Bay
I recently had a 2008 Cobalt come into the shop that was permanently stuck in 3rd gear—a classic limp mode situation. The customer was worried about a complete transmission failure. The scanner showed a P0700 (Transmission Control System Malfunction) code, a general fault that points toward the TCM. After verifying the wiring harness and fluid levels were good, we confirmed the internal logic of the original TCM had failed. Instead of a costly trip to the dealer for a new module and programming, we installed one of these VIN-programmed units. In under 30 minutes, the car was shifting perfectly through all gears, the codes were cleared, and the customer was back on the road, saving hundreds in dealership fees.
Is Your Cobalt Exhibiting These Transmission Faults?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, this module is the likely solution for your 2006-2010 Cobalt TCM issues:
- ✔ Harsh, slamming shifts or jerky gear engagement.
- ✔ The vehicle is stuck in a single gear (limp mode), often 2nd or 3rd.
- ✔ Check Engine Light is on with Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults.
- ✔ Delayed shifting or failure to upshift or downshift properly.
- ✔ A noticeable drop in fuel economy due to inefficient gear changes.
- ✔ Complete loss of communication with the transmission module.
The Power of VIN Programming
The single biggest hurdle in replacing a modern TCM is the need for expensive, dealer-only programming. We eliminate that step entirely. By providing your vehicle’s VIN during checkout, we flash the module with the latest GM software specific to your Cobalt. This ensures all shift points, torque converter lockup strategies, and diagnostic parameters are perfectly calibrated right out of the box. There are no extra steps, no special tools, and no trips to the dealership. This is a direct, effective repair that you or your mechanic can perform with confidence.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- ✔ Locate the TCM: On the Chevy Cobalt, the TCM is typically found mounted on the driver’s side strut tower in the engine bay. It’s a silver box with electrical connectors.
- ✔ Disconnect and Remove: Carefully unplug the electrical harness connectors. Then, unbolt the module from its mounting bracket.
- ✔ Install the New Module: Mount the new VIN-programmed TCM in the same location and securely fasten the bolts. Reconnect the electrical harnesses, ensuring they click into place.
- ✔ Final Steps: Reconnect the battery terminal. While the system may reset, it’s best practice to use a basic OBD2 scan tool to clear any stored transmission codes. Start the vehicle and take it for a test drive to confirm smooth shifting.
Verified Vehicle Compatibility
This T42 Transmission Control Module is a direct replacement for part number 24241806 and other service numbers. While it is a perfect fit for the 2006-2010 Chevrolet Cobalt, it is also compatible with a wide range of other General Motors vehicles. Please verify your part number or consult the detailed fitment list below.
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 module is delivered to you fully programmed to your vehicle’s VIN. It is a plug-and-play solution that requires no additional programming or dealer intervention, saving you significant time and money.
What is a T42 TCM?
The T42 is the specific hardware platform used by General Motors for the transmission control module in a wide variety of vehicles from this era, including the Chevrolet Cobalt. It controls all functions of the 4-speed automatic transmission.
Is this installation difficult for a DIYer?
Not at all. For most models like the Cobalt, the TCM is easily accessible in the engine bay. With basic hand tools, the replacement can be completed in under 30 minutes, making it an ideal project for a DIY enthusiast.
Is there a core charge for my old part?
No, there is no core charge required for this part. You can keep your old module without the hassle of returning it, simplifying the repair process for you.