If you’re dealing with the frustrating and unpredictable behavior of a failing transmission in your 2006-2010 Chevrolet Cobalt, you’re not alone. The sudden jerks, delayed shifts, or getting stuck in limp mode can make your daily drive a stressful ordeal. This isn’t just an annoyance; it’s a critical issue that compromises your car’s reliability and safety. The solution is a dependable, correctly programmed Transmission Control Module (TCM), and this T42 unit is engineered to be the definitive fix.
This is a direct-replacement, OEM-quality Transmission Control Module for your GM vehicle, specifically part number 24240400. The most significant benefit? It arrives at your door expertly pre-programmed to your vehicle’s specific VIN. This eliminates the need for expensive dealership visits, specialized scan tools, or costly programming fees. It’s designed for a seamless, plug-and-play installation, allowing you to restore your transmission’s smooth, factory-like operation right in your own garage.
Case Study: The Ghost in the Cobalt’s Transmission
A few months back, a 2009 Cobalt was brought into my shop with a classic ‘ghost’ problem. The owner complained of intermittent, bone-jarring shifts and occasional failure to upshift from second gear, but the check engine light wasn’t always on. When I scanned it, I found a stored P0700 (Transmission Control System Malfunction), a general code that points to a problem but doesn’t name the culprit. After verifying the fluid level and condition were good and checking the main harness connectors for corrosion, I suspected the TCM. On these GM platforms, I’ve seen hundreds of T42 modules fail due to internal circuit board fractures caused by years of heat cycles and vibration. Swapping in a VIN-programmed module like this one provided an immediate fix. The shift strategy was restored, the code was cleared, and the customer drove away with a car that felt brand new. This is the kind of certain repair this part provides.
Is Your Cobalt Showing 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. This 2006-2010 Cobalt Transmission Module is designed to resolve these very issues.
- ✔ Harsh, erratic, or slamming shifts between gears.
- ✔ Vehicle is stuck in “limp mode,” often refusing to shift out of 2nd or 3rd gear.
- ✔ Check Engine Light or Transmission Warning Light is illuminated with codes like P0700, P0750, or other solenoid-related DTCs.
- ✔ Complete loss of upshifting or downshifting capabilities.
- ✔ Noticeable decrease in fuel economy accompanied by poor shifting.
- ✔ Delayed or no engagement when shifting into Drive or Reverse.
Your 30-Minute Path to Smooth Shifting
Installation is straightforward and can be completed by a DIY enthusiast with basic tools in under half an hour. For the Chevy Cobalt, the TCM is typically located on the driver’s side strut tower in the engine bay.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and help reset the system.
- Locate the Module: Find the TCM, which is a silver box with electrical connectors, mounted to the LH strut tower.
- Disconnect and Remove: Carefully unplug the electrical harness connectors. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed module into place. Securely plug in the electrical connectors until they click.
- Final Steps: Reconnect the negative battery terminal. While the module is plug-and-play, it’s good practice to use a basic scan tool to clear any lingering fault codes from the vehicle’s memory.
Verified Fitment for Your General Motors Vehicle
While this is a perfect solution for the 2006-2010 Cobalt Transmission Module, this T42 unit is compatible with a wide array of GM vehicles. Please verify your model and options below. This part is interchangeable with service numbers 24252114, 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, 24239926, 24240400, and more.
This part will fit these makes and models with these options
COBALT 06-10 Transmission; (LH strut tower)
ALLURE 06-09 Transmission; (lower air cleaner housing)
AVALANCHE 1500 07-08 Transmission; (next to battery)
AURA 07-09 Transmission; (LH frame rail front)
CANYON 08-12 Transmission; (RH rear engine compartment)
COLORADO 08-12 Transmission; (RH rear engine compartment)
DTS 06-11 Transmission; (RH front engine compartment)
ENVOY 06-07 Transmission; (LH engine compartment), (8 cylinder)
ENVOY 08-09 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 06-07 Transmission; (4.6L), (LH engine compartment)
LUCERNE 08-11 Transmission; (LH engine compartment)
MALIBU 06-10 Transmission; (LH frame rail)
MONTE CARLO 06-07 Transmission; (lower air cleaner housing)
MONTANA 06-09 Transmission; (LH strut tower)
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 Transmission; (new style, smooth door skin), (next to battery)
SIERRA 1500 PICKUP 08 Transmission; (next to battery)
SIERRA 1500 PICKUP 09-13 Transmission; (next to battery), w/o hybrid option
SIERRA 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (next to battery)
SILVERADO 1500 PICKUP 07 Transmission; (new style, smooth door skin), (next to battery)
SILVERADO 1500 PICKUP 08 Transmission; (next to battery)
SILVERADO 1500 PICKUP 09-13 Transmission; (next to battery), w/o hybrid option
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 Transmission; (next to battery)
TAHOE 08-09 Transmission; (next to battery), w/o auxiliary oil cooler pump
TERRAZA 06-07 Transmission; (LH strut tower)
TRAILBLAZER 06-07 Transmission; (LH engine compartment), (8 cylinder)
TRAILBLAZER 08-09 Transmission; (LH engine compartment)
TRAILBLAZER EXT 06 Transmission; (LH engine compartment), (8 cylinder)
UPLANDER 06-09 Transmission; (LH strut tower)
VUE 07-08 Transmission; 2.4L, (LH front engine compartment)
VUE 09 Transmission; 2.4L, w/hybrid, LH side front engine compartment, (shift control)
VUE 09 Transmission; 2.4L, w/o hybrid; (LH front engine compartment)
VUE 10 Transmission
YUKON 07 Transmission; (next to battery)
YUKON 08 Transmission; (next to battery), w/o auxiliary oil cooler control
YUKON 09 Transmission; (next to battery), w/o auxiliary oil cooler pump
YUKON XL 1500 07-08 Transmission; (next to battery)
Frequently Asked Questions
Does this module need to be programmed by a dealer?
No. This module comes fully pre-programmed to your vehicle’s VIN. You just need to install it. This saves you the time, cost, and hassle of a dealership visit.
Will this fix a P0700 transmission code?
In many cases, yes. A P0700 code indicates a general fault in the transmission control system. If the TCM itself is the source of the problem, replacing it with this programmed unit will resolve the code and the underlying issue.
Where is the TCM located on a 2007 Chevy Cobalt?
On most 2006-2010 Chevrolet Cobalts, the Transmission Control Module (TCM) is located in the engine compartment, bolted to the driver’s side (LH) strut tower. It is a silver metal box with large electrical connectors.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old part, so you don’t have to worry about the cost or hassle of shipping it back.
What kind of warranty is included?
This part is backed by our one-year warranty, giving you peace of mind that you are purchasing a quality, reliable component for your vehicle.