Fix Your Truck’s Shifting Problems for Good
If you’re dealing with a GMC Canyon that’s shifting erratically, getting stuck in gear, or throwing transmission codes, you’ve come to the right place. As a technician with over two decades of experience, I know how frustrating these issues can be. This isn’t just an annoyance; it’s a reliability problem. This T42 Transmission Control Module (TCM), part number 24252114, is the definitive solution for your 2008-2012 GMC Canyon, arriving expertly programmed to your truck’s VIN for a true plug-and-play repair.
Case Study: A Tricky Diagnosis
A customer brought in his 2010 Canyon, complaining it would randomly refuse to shift past 2nd gear—a classic limp mode symptom. His scanner showed a generic P0700 code. After checking the basics like fluid level and wiring, we suspected the TCM. The internal electronics on these modules, especially after years of heat cycles in the engine bay, can develop micro-fractures, leading to intermittent failures. Instead of a costly diagnostic goose chase, we installed one of our VIN-programmed modules. The truck was shifting perfectly within 30 minutes, saving the customer hundreds in dealership fees and diagnostic labor.
Is Your Canyon Exhibiting These Telltale Signs?
A failing TCM doesn’t heal itself; it only gets worse. If you’re noticing any of these symptoms, it’s time for a replacement. Ignoring them can lead to more significant transmission damage down the road.
- ✔ Harsh, slamming shifts or delayed gear engagement.
- ✔ The truck is stuck in “limp mode” (usually 2nd or 3rd gear).
- ✔ Check Engine Light is on with transmission-related Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid circuit faults.
- ✔ Complete failure to upshift or downshift, making the vehicle unsafe to drive.
- ✔ A noticeable drop in fuel economy as the transmission operates inefficiently.
- ✔ Intermittent loss of communication with the TCM, causing unpredictable behavior.
A Straightforward Guide to Installation
One of the best features of this module is how simple the installation is. Because we program it to your VIN before shipping, you bypass the need for expensive dealer-specific scan tools. For a 2008-2012 Canyon TCM, the process is quick and requires only basic hand tools.
- Safety First: Always disconnect the negative terminal on your truck’s battery to prevent electrical shorts and reset the system.
- Locate the Module: On the GMC Canyon and its sibling, the Chevy Colorado, the TCM is typically found in the engine compartment on the right-hand (passenger) side, towards the rear.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. Then, unbolt the old module from its mounting bracket.
- Install the New TCM: Bolt the new 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 engine and let it run for a minute. While the module is plug-and-play, it’s good practice to use a standard code reader to clear any stored DTCs from the old unit’s failure.
Verified Vehicle Compatibility
This T42 TCM is a direct replacement for part number 24252114 and other service numbers. While it is guaranteed to fit the specified GMC Canyon, it is also compatible with a wide range of other General Motors vehicles. Please verify your part number and vehicle fitment below.
This part will fit these makes and models with these options:
CANYON 08-12 Transmission; (RH rear engine compartment)
COLORADO 08-12 Transmission; (RH rear engine compartment)
HUMMER H3 08-10 Transmission; (RH rear engine compartment)
And many other GM models including Silverado, Tahoe, Yukon, Express, Savana, Impala, and more from 2006-2014. Please confirm your part number for an exact match.
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean for me?
It means we load your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM software onto the module before we ship it. This ensures it communicates perfectly with your truck’s engine computer and other systems right out of the box, eliminating the need for a trip to the dealership for expensive programming.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer (ECM) to turn on the Check Engine Light. In many cases, a faulty TCM is the root cause. Replacing the module with this pre-programmed unit often resolves the underlying issue that triggers the P0700 code.
Is this a difficult part for a DIY mechanic to install?
Not at all. The installation is very straightforward, typically taking less than 30 minutes with basic hand tools. Since it’s located in the engine bay and not inside the transmission, it’s an accessible repair perfect for a DIYer.
Do I need to send my old part back?
No, there is no core charge for this part. You can keep your old module or dispose of it without the hassle of a return process.
What kind of warranty is included?
We stand behind our parts. This transmission control module comes with a one-year warranty, giving you peace of mind that you’re investing in a quality, reliable component for your truck.