Fix Your Colorado’s Shifting Problems for Good
If you’re dealing with a 2008-2012 Chevrolet Colorado that’s shifting harshly, getting stuck in gear, or throwing transmission codes, a faulty Transmission Control Module (TCM) is the most likely culprit. As a technician with over two decades of experience, I’ve seen this exact issue countless times. The TCM is the brain of your automatic transmission, and when it fails, it can make your reliable truck feel unpredictable and unsafe. This T42 TCM, part number 24240449, is the definitive solution, arriving pre-programmed to your truck’s specific VIN for a true plug-and-play repair.
Case Study: A Tricky Diagnosis
A customer brought in his 2011 Colorado, complaining of it being stuck in 3rd gear (limp mode) with the check engine light on. His local shop quoted him for a full transmission rebuild. I pulled the codes and saw a P0700 (Transmission Control System Malfunction) and a P0753 (Shift Solenoid ‘A’ Electrical). Instead of jumping to the solenoids, I checked the TCM wiring and found it intact. Knowing these T42 modules are a common failure point, we swapped in a VIN-programmed unit. The codes cleared, the truck shifted perfectly, and the customer saved thousands. A 30-minute part swap fixed what was misdiagnosed as a catastrophic failure.
Is Your Colorado Exhibiting These Telltale Signs?
A failing TCM doesn’t just go out silently. It gives clear warning signs that you shouldn’t ignore. If your truck is experiencing any of the following, it’s time to inspect your TCM:
- ✔ Abrupt, harsh, or delayed gear shifts.
- ✔ The truck refuses to shift out of a single gear (often called limp mode).
- ✔ An illuminated Check Engine Light or Transmission Warning Light.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750-P0758, or other solenoid-related faults.
- ✔ A sudden drop in fuel economy for no apparent reason.
- ✔ Complete loss of communication with the transmission module.
Why Our Pre-Programmed 2008-2012 Colorado TCM is the Smart Choice
This isn’t just a replacement part; it’s a complete solution. We handle the most complicated part of the job for you. By programming the module to your vehicle’s VIN before it ships, we eliminate the need for expensive dealership tools or programming appointments. This module is loaded with the latest GM software updates to ensure it communicates flawlessly with your truck’s powertrain, restoring the crisp, predictable shifting you expect. It’s built to meet or exceed OEM specifications for a long-lasting, reliable repair.
A Straightforward Guide to Installation
For the 2008-2012 Chevy Colorado and GMC Canyon, this is a repair you can confidently tackle in your own driveway. The TCM is conveniently located and easy to access.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts and to help reset the vehicle’s computer systems.
- Locate the Module: On the Colorado and Canyon, you’ll find the TCM in the engine compartment, typically mounted on the right-hand (passenger side) rear of the engine bay.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly and pull straight out. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Bolt the new, pre-programmed module into place and securely reconnect the electrical harnesses. You should hear a click as they lock in.
- Final Steps: Reconnect the battery terminal. Start the truck and allow it to idle for a few minutes. While the module is plug-and-play, it’s always a good practice to use a basic scan tool to clear any stored fault codes from the initial failure.
Verified Fitment for Your Truck and More
This T42 Transmission Control Module is a direct-fit replacement for the following vehicles and part numbers. It is interchangeable with service numbers including 24252114, 24234503, 24240449, and others.
- Chevrolet Colorado (2008-2012) – Transmission; (RH rear engine compartment)
- GMC Canyon (2008-2012) – Transmission; (RH rear engine compartment)
- Hummer H3 (2008-2010) – Transmission; (RH rear engine compartment)
- Also fits a wide range of other 2006-2014 GM vehicles including Silverado, Tahoe, Sierra, Yukon, Impala, and more. Please verify your part number or contact us with your VIN.
Frequently Asked Questions
Frequently Asked Questions
Do I need to take my truck to the dealer after installing this TCM?
No. This module comes fully programmed to your vehicle’s VIN. It is a true plug-and-play solution, saving you the time and expense of a dealership visit for programming.