Restore Smooth Shifting to Your Chevy Cobalt
If your 2006-2010 Chevrolet Cobalt is suffering from harsh shifting, getting stuck in gear, or throwing transmission-related error codes, you’re likely dealing with a failed Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen firsthand how a faulty TCM can make a perfectly good car feel unreliable and unsafe. This T42 series module, part number 24240449, is the definitive solution, engineered to restore your vehicle’s transmission to its original, smooth-operating condition.
The TCM is the electronic brain of your automatic transmission. It processes data from various sensors to control shift points, torque converter clutch engagement, and line pressure. When it fails, the symptoms are immediate and often frustrating. This replacement module is not just a part; it’s a complete, pre-programmed fix. We handle the critical VIN programming in-house before shipping, using the latest GM software updates. This means you get a true plug-and-play component that requires no expensive trip to the dealership for calibration. It arrives ready to install, saving you time and money.
Case Study: A Tricky Diagnosis
A customer brought in a 2008 Cobalt with the check engine light on and the car stuck in what felt like third gear—a classic case of limp mode. They were worried they needed a full transmission rebuild, a repair that can run into thousands. After connecting my scan tool, I pulled a P0700 (Transmission Control System Malfunction) and several solenoid circuit codes. Instead of tearing into the transmission, my experience pointed to the electronics. We tested the TCM and found it was failing intermittently. We swapped in a VIN-programmed T42 module, cleared the codes, and the car shifted perfectly on the test drive. The customer saved a fortune by correctly diagnosing the electronic failure first.
Is Your Cobalt Showing These Transmission Warning Signs?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indicator that your 2006-2010 Cobalt TCM needs replacement:
- ✔ Harsh, jerky, or delayed gear shifts.
- ✔ The vehicle is stuck in a single gear (limp mode).
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0753, P0758, or other solenoid-related faults are present.
- ✔ Inability to shift into higher or lower gears.
- ✔ A noticeable decrease in fuel economy.
- ✔ The transmission feels like it’s slipping between gears.
A Straightforward Guide to Installation
For the confident DIYer or professional mechanic, installing this module is a simple process. The TCM on the Chevrolet Cobalt is conveniently located and can typically be replaced in under 30 minutes with basic hand tools.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic work.
- Locate the Module: On most 2006-2010 Cobalts, the TCM is found on the driver’s side of the engine bay, mounted to the LH strut tower.
- Disconnect and Remove: Carefully unplug the electrical connectors. Be gentle with the locking tabs, as they can become brittle over time. Then, unbolt the module from its mounting bracket.
- Install the New Module: Mount your new, VIN-programmed TCM in place and tighten the bolts. Reconnect the electrical harnesses, ensuring they click securely into place.
- Final Steps: Reconnect the battery terminal. While the module is pre-programmed, it’s always a good practice to use a scan tool to clear any stored DTCs from the system’s memory.
Verified Vehicle Compatibility
This T42 TCM, part number 24240449, is a direct replacement for a wide range of General Motors vehicles. While this listing is focused on the 2006-2010 Cobalt TCM, it is also compatible with other models. It interchanges with part numbers such as 24252114, 24234503, 24230461, and more. Please verify your specific part number or use our vehicle lookup tool to ensure perfect fitment.
- Chevrolet Cobalt (2006-2010) – Transmission; (LH strut tower)
- Pontiac G5 (2007-2010) – Transmission; (LH strut tower)
- Chevrolet HHR (2006-2011) – Transmission; (LH engine compartment)
- Saturn Ion (2006-2007) – Transmission; (behind LH strut tower)
- And many other GM cars, trucks, and SUVs from 2006-2014.
Frequently Asked Questions
What is VIN programming and why is it important?
VIN programming loads your vehicle’s specific software and calibrations onto the TCM. This ensures the transmission shifts correctly based on your car’s engine, tire size, and other factory settings. Without it, the module won’t work properly. We do this for you, so it’s ready for installation right out of the box.
Do I need to return my old TCM?
No, there is no core charge for this part. You can keep your old module, which saves you the time and hassle of return shipping.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. Often, replacing a faulty TCM will resolve the P0700 and any related specific codes (like for shift solenoids). However, you should always confirm the module itself is the point of failure.
Is this a new or used part?
This is a high-quality, OEM-spec replacement part that has been expertly tested and programmed to ensure reliability. It is backed by our one-year warranty for your peace of mind.
What tools are required for installation?
For most applications, including the Cobalt, you will only need basic hand tools, such as a socket set (commonly 10mm) and a small flathead screwdriver to help release connector tabs. No specialized equipment is needed.