Restore Smooth Shifting to Your 2008-2012 Chevrolet Colorado
If your Chevy Colorado or GMC Canyon is suffering from harsh shifting, getting stuck in gear, or throwing transmission codes, the culprit is often a failing Transmission Control Module (TCM). As a seasoned technician, I’ve seen countless trucks come into the shop with these exact issues. This T42-style TCM, part number 24239926, is the definitive solution, arriving pre-programmed to your truck’s specific VIN for a true plug-and-play repair that gets you back on the road without a costly trip to the dealership.
The TCM is the brain of your automatic transmission, controlling everything from shift points and line pressure to torque converter lockup. When it fails, communication between the engine and transmission breaks down, leading to the frustrating and potentially damaging symptoms you’re experiencing. Our module restores that critical link, ensuring your transmission operates exactly as the factory intended.
A customer brought in his 2010 Colorado, complaining of intermittent, violent gear shifts and a persistent check engine light. His local shop had already replaced two shift solenoids, but the problem remained. When I pulled the codes, I saw a generic P0700 (Transmission Control System Malfunction) and an intermittent solenoid circuit code. Experience told me this wasn’t a mechanical issue. We checked the wiring harness for damage—it was fine. The problem was the original TCM sending faulty signals. After installing a VIN-programmed 2008-2012 Colorado TCM, the truck shifted like new. The customer saved hundreds by avoiding further unnecessary parts-swapping.
Is Your Colorado Exhibiting These Telltale TCM Failure Signs?
A faulty TCM can manifest in several ways. If you’re noticing any of the following, it’s a strong indicator that your module needs replacement. Diagnosing this correctly can save you from a much more expensive transmission rebuild.
- ✔ Harsh, erratic, or delayed gear shifts.
- ✔ Vehicle entering “limp mode,” often stuck in 2nd or 3rd gear.
- ✔ Check Engine Light or Transmission Warning Light is on.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, P0753, P0758, or other solenoid-related faults.
- ✔ A complete failure to shift up or down.
- ✔ Poor fuel economy and a feeling of sluggish performance.
DIY Guide: Installing Your 2008-2012 Colorado TCM in Under 30 Minutes
One of the best features of this module is its straightforward installation. You don’t need to be a professional mechanic to get this job done. For the 2008-2012 Colorado and Canyon, the TCM is conveniently located in the engine bay.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the vehicle’s adaptive memory.
- Locate the Module: Find the TCM on the right-hand (passenger side) rear of the engine compartment. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unclip the electrical wiring harnesses. Then, unbolt the module from its mounting bracket. Keep the hardware safe for reinstallation.
- Install the New TCM: Mount the new, VIN-programmed module onto the bracket and securely fasten the bolts. Reconnect the wiring harnesses, ensuring they click firmly into place.
- Final Steps: Reconnect the negative battery terminal. Start the vehicle and allow it to idle for a few minutes. While not always necessary, using a basic scan tool to clear any stored fault codes is a good final step.
Verified Vehicle Compatibility
This module is a direct replacement for part number 24239926 and other interchangeable numbers. It is specifically programmed for the following vehicles:
- Chevrolet Colorado 2008, 2009, 2010, 2011, 2012 (Located at RH rear engine compartment)
- GMC Canyon 2008, 2009, 2010, 2011, 2012 (Located at RH rear engine compartment)
- Hummer H3 & H3T 2008, 2009, 2010 (Located at RH rear engine compartment)
This part is also compatible with a wide range of other 2006-2014 GM vehicles. Please verify your part number or contact our expert support team to ensure perfect fitment.
Frequently Asked Questions
What does ‘VIN Programmed’ mean for me?
It means we flash the module with your vehicle’s unique Vehicle Identification Number (VIN) and the latest GM software before shipping. This ensures it communicates perfectly with your truck’s other computers right out of the box, eliminating the need for expensive dealership programming.
Do I need to return my old TCM?
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.
Is this installation difficult for a DIYer?
Not at all. For the Colorado and Canyon, this is one of the easier electronic component replacements. With basic hand tools, the job can typically be completed in under 30 minutes in your own driveway.
Will this fix my check engine light?
If the check engine light is caused by a faulty TCM (e.g., codes like P0700 or solenoid circuit faults), then yes, this part is designed to resolve those issues. After installation, we recommend clearing any old codes with a scan tool.
What if I have a different GM truck like a Silverado or an SUV like a Tahoe?
This T42-style TCM fits a very wide range of GM vehicles from 2006-2014. While this listing focuses on the Colorado, the module itself is compatible with many others. Please check the full fitment list or contact us with your VIN to confirm.