Restore Your Truck’s Shifting Performance
If you’re dealing with erratic shifting, a check engine light, or your 2008-2012 Chevrolet Colorado is stuck in limp mode, a failing Transmission Control Module (TCM) is the most likely culprit. As a technician with over two decades of experience, I’ve seen countless GM trucks sidelined by these exact issues. This T42 series TCM, part number 24256960, is the definitive, reliable solution. It arrives pre-programmed to your truck’s specific VIN, eliminating the need for expensive dealership visits and ensuring a seamless, plug-and-play installation. Get your truck back to operating the way it should—smoothly and dependably.
From the Diagnostic Bay: The Intermittent Limp Mode Mystery
A customer brought in his 2011 Colorado, complaining that it would randomly refuse to shift past 2nd gear, especially on hot days. He’d already replaced a shift solenoid with no luck. The scanner showed a generic P0700 transmission fault code, but nothing specific. After checking the wiring harness for damage, we focused on the TCM. These modules, located in the hot engine bay, often fail from heat cycles. We swapped in one of our VIN-programmed T42 modules. The fix was immediate. The truck’s shifting became crisp and predictable, and the code never returned. It’s a classic case where replacing the brain, not just the limbs, solves the problem for good.
Is Your Colorado Exhibiting These Transmission Faults?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, this module is the solution you need. In my shop, these symptoms almost always point directly to a faulty 2008-2012 Colorado TCM.
- âś” Harsh, slamming shifts or delayed gear engagement.
- âś” The vehicle is stuck in a single gear (often called ‘limp mode’).
- âś” An illuminated Check Engine Light or Transmission Warning Light.
- âś” Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults are present.
- âś” Unexplained drops in fuel economy or transmission overheating warnings.
- âś” Complete loss of communication with the transmission module.
A Straightforward Guide to Installation
One of the best features of this part is its simple installation. You don’t need a lift or specialized tools, just basic hand tools and about 30 minutes. For the 2008-2012 Chevrolet Colorado and GMC Canyon, the TCM is conveniently located in the right-hand rear of the engine compartment.
- Safety First: Always disconnect the negative terminal from your truck’s battery before starting any electrical work.
- Locate the Module: Find the TCM on the RH rear side of the engine bay. It will have several large electrical connectors attached.
- Disconnect and Remove: Carefully unclip the wiring harness connectors. Then, unbolt the old module from its mounting bracket.
- Install the New TCM: Bolt the new module into place and securely reconnect the wiring harnesses. Ensure the clips click into place.
- Final Steps: Reconnect the battery terminal. While our VIN programming handles the critical setup, it’s good practice to use a basic OBD2 scanner to clear any stored fault codes from the ECU.
Verified Vehicle Compatibility
This T42 Transmission Control Module is a direct-fit replacement for a wide range of General Motors vehicles. While this page focuses on the 2008-2012 Colorado TCM, please verify your specific model in the list below. This part is interchangeable with service numbers 24242391, 24234503, 24252114, 24256960, and more.
This part fits the following vehicles (and many more):
- 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)
- CHEVROLET SILVERADO 1500 2007-2013: Transmission; (next to battery)
- GMC SIERRA 1500 2007-2013: Transmission; (next to battery)
- CHEVROLET TAHOE 2007-2009: Transmission; (next to battery)
- GMC YUKON 2007-2009: Transmission; (next to battery)
- CHEVROLET EXPRESS / GMC SAVANA VANS 2006-2014: Transmission; (RH engine compartment)
Frequently Asked Questions
Do I need to take my truck to the dealer for programming?
No. This module comes fully programmed to your vehicle’s VIN. It is ready for installation right out of the box, saving you time and the high cost of dealership programming.
Is this a difficult part for a DIYer to install?
Not at all. For the Colorado, it’s located in an accessible part of the engine bay. With basic hand tools, most people can complete the replacement in under 30 minutes. Just follow our installation guide.
What is a ‘core charge’ and do you require one?
A core charge is a deposit you pay until you return your old part. We do not have a core charge on this module, so you can keep your old part without any hassle.
Will this fix a P0700 trouble code?
Yes. A P0700 code is a general transmission fault code, which means the TCM has detected a problem. In many cases, a failing TCM is the root cause of the P0700 code itself. Replacing it often resolves the issue.
What kind of warranty is included?
This transmission control module is backed by our one-year, hassle-free warranty, giving you confidence and peace of mind in your repair.