Restore Smooth, Reliable Shifting to Your Chevrolet Cobalt
If your 2006-2010 Chevrolet Cobalt is suffering from erratic shifting, getting stuck in gear, or has the dreaded check engine light on with transmission codes, you’ve likely pinpointed a failing Transmission Control Module (TCM). As a seasoned technician, I’ve seen these T42 modules cause headaches for countless owners. The internal electronics are sensitive to heat and vibration, leading to communication failures that the Powertrain Control Module (PCM) flags immediately. This isn’t just an annoyance; it’s a reliability issue that can leave you stranded. Our replacement TCM, part number 24235732, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play fix.
Case Study: A Tricky Diagnosis
A customer brought in a 2009 Cobalt that would intermittently refuse to shift past 2nd gear—a classic limp mode symptom. They had already replaced two shift solenoids at another shop with no success. A quick scan showed a P0700 (Transmission Control System Malfunction) and an intermittent U0101 (Lost Communication with TCM). Instead of throwing more parts at it, we inspected the TCM. After confirming power and ground were good, the diagnosis was clear: an internal TCM failure. We installed one of our VIN-programmed modules, cleared the codes, and the car shifted perfectly on the test drive. The customer saved hundreds by avoiding further guesswork and an expensive trip to the dealership.
Is Your Cobalt Exhibiting These Telltale Signs?
A faulty TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement:
- ✔ Harsh, jerky, or delayed gear shifts that make driving uncomfortable.
- ✔ Vehicle is stuck in ‘limp mode,’ often locked in 2nd or 3rd gear.
- ✔ The 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 faults.
- ✔ Complete failure to upshift or downshift, leading to poor acceleration and fuel economy.
- ✔ Intermittent loss of communication with the module, causing unpredictable performance.
Your Straightforward 30-Minute Installation Guide
One of the best features of this part is its accessibility. For the 2006-2010 Cobalt, the TCM is easy to locate and replace, making this a perfect job for a DIY enthusiast. No complex procedures or special tools are needed.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: On your Cobalt, the TCM is conveniently located at the driver’s side (LH) strut tower in the engine bay. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unclip the wiring harnesses. Then, unbolt the module from its mounting bracket. It’s typically held on by a few small bolts.
- Install the New TCM: Mount your new, pre-programmed module onto the bracket and securely re-fasten the bolts. Reconnect the wiring harnesses, ensuring they click firmly into place.
- Final Steps: Reconnect the battery terminal. Start the vehicle and allow it to idle for a few minutes. If you have a basic scan tool, it’s good practice to clear any stored fault codes. Take the car for a test drive to confirm smooth shifting.
Verified Fitment Across the GM Family
While this is a perfect solution for the 2006-2010 Cobalt TCM, this versatile T42 module is also a direct replacement for a wide array of other General Motors vehicles. Please verify your specific model and location below. This part is interchangeable with service numbers including 24242391, 24234503, and 24252114.
COBALT 06-10 Transmission; (LH strut tower)
G5 07-10 Transmission; (LH strut tower)
HHR 06-11 Transmission; (LH engine compartment)
ION 06-07 Transmission; (behind LH strut tower)
MALIBU 06-10 Transmission; (LH frame rail)
G6 06-10 Transmission; (LH strut tower)
AURA 07-09 Transmission; (LH frame rail front)
VUE 07-08 Transmission; 2.4L, (LH front engine compartment)
VUE 09 Transmission; 2.4L, (LH front engine compartment)
VUE 10 Transmission
IMPALA 06-11 Transmission; (lower air cleaner housing)
MONTE CARLO 06-07 Transmission; (lower air cleaner housing)
GRAND PRIX 06-08 Transmission; (lower air cleaner housing)
LACROSSE 06-09 Transmission; (lower air cleaner housing)
ALLURE 06-09 Transmission; (lower air cleaner housing)
LUCERNE 06-11 Transmission; (LH engine compartment)
DTS 06-11 Transmission; (RH front engine compartment)
SILVERADO & SIERRA 1500/2500 07-13 Transmission; (next to battery)
TAHOE & YUKON 07-09 Transmission; (next to battery)
AVALANCHE & SUBURBAN 1500 07-08 Transmission; (next to battery)
EXPRESS & SAVANA VANS 06-14 Transmission; (RH engine compartment)
COLORADO & CANYON 08-12 Transmission; (RH rear engine compartment)
HUMMER H3 08-10 Transmission; (RH rear engine compartment)
TRAILBLAZER & ENVOY 06-09 Transmission; (LH engine compartment)
…and many more.
Do I need to program this TCM at the dealership?
Do I need to program this TCM at the dealership?
No. This is the biggest benefit of our service. We pre-program the module to your car’s exact Vehicle Identification Number (VIN) before shipping. This means it’s ready for installation right out of the box, saving you the time and expense of a dealership visit.
Will this fix a P0700 trouble code on my Cobalt?
In most cases, yes. The P0700 code is a general fault code indicating the TCM has detected a problem. If the TCM itself is the source of the failure (which is very common), replacing it with our programmed unit will resolve the P0700 code and any related transmission codes.
Where is the TCM located on a 2007 Chevy Cobalt?
For the 2006-2010 Chevrolet Cobalt, the Transmission Control Module is located in the engine compartment, mounted to the driver’s side (left-hand) strut tower. It is easily accessible once you open the hood.
Is there a core charge for this part?
No, we do not require a core charge. You can keep your old part, which simplifies the process and saves you the hassle and cost of return shipping.