Restore Smooth Shifting to Your Chevrolet Colorado
If your 2008-2012 Chevrolet Colorado is suffering from harsh shifts, getting stuck in gear, or throwing transmission codes, you’ve likely pinpointed the culprit: a failing Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen countless GM trucks sidelined by faulty electronics. The TCM is the brain of your automatic transmission, and when it fails, it can mimic a catastrophic mechanical failure, causing unnecessary stress and diagnostic headaches. This T42 series TCM, part number 24239926, is the reliable, straightforward solution to get your truck back to operating as it should.
We take the guesswork and dealership expense out of the equation. Each module is expertly programmed to your truck’s specific Vehicle Identification Number (VIN) before it ships. This means it arrives ready for a true plug-and-play installation, with the latest GM software updates already loaded. You can restore crisp, predictable shifting and clear persistent diagnostic trouble codes without needing a trip to the dealer for expensive programming.
A Technician’s Notebook: The Misleading Limp Mode
A customer brought in a 2010 Colorado, stuck in what he thought was third gear (limp mode) with the check engine light glaring. His local shop quoted him for a full transmission rebuild, assuming the worst. On my scan tool, I saw a generic P0700 transmission fault code. Instead of tearing into the transmission, I checked the TCM data stream first. It was erratic, dropping communication intermittently. This is a classic sign of internal TCM failure, often caused by years of heat cycles and vibration. We replaced the module with a VIN-programmed unit like this one, and in under an hour, the truck was shifting perfectly. He saved thousands by correctly diagnosing an electronic issue, not a mechanical one.
Is Your Colorado Exhibiting These Transmission Issues?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, this module is the likely solution for your 2008-2012 Colorado TCM problems.
- ✔️ Harsh, slamming shifts or delayed gear engagement.
- ✔️ Vehicle is stuck in one gear (often called “limp mode”).
- ✔️ Check Engine Light or Transmission Warning Light is on with codes like P0700, P0750, or other solenoid-related faults.
- ✔️ The transmission refuses to upshift or downshift correctly.
- ✔️ A noticeable drop in fuel economy or signs of the transmission overheating.
- ✔️ Complete loss of communication with the transmission module.
A Straightforward DIY Installation for Your Colorado
One of the best features of this part is its ease of installation. You don’t need a vehicle lift or specialized transmission tools. For the Chevy Colorado, GMC Canyon, and Hummer H3, the process is simple.
- Safety First: Always disconnect the negative terminal from your truck’s battery before starting any electronic work.
- Locate the Module: On your 2008-2012 Colorado, the TCM is located in the engine bay, typically on the right-hand (passenger) side, at the rear of the compartment.
- Disconnect and Remove: Carefully unplug the electrical connectors. Be gentle with the locking tabs, as they can become brittle over time. Then, unbolt the old module from its mounting bracket.
- Install the New TCM: Mount the new, pre-programmed module in place and securely fasten it. Reconnect the electrical harnesses, ensuring they click into place.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s good practice to use a basic OBD-II scan tool to clear any stored fault codes from the engine computer (ECU). Start the vehicle and test drive to confirm smooth operation.
Verified Vehicle Compatibility
This module is a direct replacement for part number 24239926 and other interchangeable numbers. It is guaranteed to fit the following vehicles:
- 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)
- …and many other GM vehicles from 2006-2014. Please verify your part number or contact us with your VIN to ensure perfect fitment. This part is also a direct replacement for service numbers such as 24234503, 24252114, and 24242391.
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean for my truck?
It means we flash the module with your vehicle’s unique VIN and the latest factory software before shipping. This ensures it communicates perfectly with your truck’s other computers (like the ECU and BCM) right out of the box, eliminating the need for a dealership visit.
Do I need to send my old TCM back?
No, there is no core charge for this part. You can keep your old module or dispose of it responsibly without any hassle or extra fees.
Will this fix a P0700 code on my 2008-2012 Colorado TCM?
A P0700 code is a generic fault request from the TCM to the main engine computer. While this module often resolves the underlying issue causing the P0700 (like a solenoid circuit fault), you should always diagnose any other specific codes that are present. In many cases, a faulty TCM is the root cause.
Is any other relearn procedure required after installation?
No. Because the unit is pre-programmed to your VIN, no complex relearn procedures are necessary. After installation and clearing codes, the vehicle will adapt to the new module during the first few drive cycles.