Get Your GMC Canyon Shifting Smoothly Again
If you’re dealing with the frustration of a transmission that won’t shift correctly, goes into limp mode, or throws confusing error codes, you’re not alone. As a technician with over two decades of experience, I’ve seen countless GM trucks, including the 2008-2012 GMC Canyon, sidelined by a faulty Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, and when it fails, it can cause a cascade of problems that seem complex but often point back to this single component. This T42 TCM, part number 24252114, is the reliable, direct-fit solution to restore your truck’s performance and get you back on the road with confidence.
Case Study: The Ghost in the Transmission
I remember a 2011 Canyon that came into my shop with a classic ‘ghost’ problem. The owner complained of intermittent harsh shifting and occasionally getting stuck in 3rd gear, but the issue would vanish after restarting the truck. We checked fluids, scanned for codes (only a generic P0700), and inspected the wiring harness. Everything looked fine. After ruling out mechanical issues, we focused on the electronics. We swapped in this pre-programmed T42 TCM, and the problem was solved instantly. The original module had developed an internal fault that only appeared when it heated up, a common failure mode I’ve diagnosed hundreds of times.
Is Your Canyon Exhibiting These Telltale Signs?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement. Ignoring these symptoms can lead to more significant transmission damage down the line.
- âś” Harsh, slamming shifts or delayed gear engagement.
- âś” The vehicle is stuck in a single gear (often called ‘limp mode’).
- âś” Check Engine Light or Transmission Warning Light is illuminated on your dash.
- âś” Your scan tool shows Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults.
- âś” Complete failure to upshift or downshift, leading to poor acceleration and fuel economy.
- âś” Unexplained loss of communication with the transmission module.
A Straightforward Guide to Your 2008-2012 Canyon TCM Installation
One of the best features of this module is that it’s designed for a straightforward installation that most DIY enthusiasts can complete in their own garage. Because we pre-program it to your truck’s VIN, you can skip the expensive trip to the dealership for programming. For the GMC Canyon, the TCM is typically located in the engine bay on the right-hand (passenger) side, near the rear of the engine compartment.
- Safety First: Before you begin, disconnect the negative terminal from your vehicle’s battery. This prevents any electrical shorts and helps reset the vehicle’s onboard systems.
- Locate the TCM: Find the module on the RH rear of the engine compartment. It will have several large electrical connectors attached to it.
- Disconnect and Remove: Carefully unclip the wiring harnesses. There may be locking tabs you need to release. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Securely reconnect the wiring harnesses, making sure they click 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 historical codes is a good final step.
Verified Vehicle Compatibility
This T42 TCM is a direct replacement for part number 24252114 and is interchangeable with a wide range of other service numbers. It fits numerous General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. While this page focuses on the 2008-2012 Canyon TCM, please see the comprehensive list below to confirm fitment for other models.
- GMC Canyon (2008-2012) – Transmission; (RH rear engine compartment)
- Chevrolet Colorado (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 / GMC Yukon (2007-2009) – Transmission; (next to battery)
- Chevrolet Express / GMC Savana Vans (2006-2014) – Transmission; (RH engine compartment)
- And many more GM cars, trucks, and SUVs from 2006-2014.
Frequently Asked Questions
Do I need to have this TCM programmed by a dealer?
No. We handle all the programming for you. Simply provide your vehicle’s VIN during checkout, and the module will arrive ready for a plug-and-play installation, saving you time and money.
Is this a new or used part?
This is a high-quality, OEM-standard component that has been expertly prepared and programmed for your vehicle. It is backed by our one-year warranty for your peace of mind.
Where is the TCM located on my 2009 GMC Canyon?
For the 2008-2012 GMC Canyon and its sibling, the Chevy Colorado, the TCM is located in the engine bay. You’ll find it on the passenger side (RH side) towards the back of the engine compartment.
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. While the P0700 itself doesn’t pinpoint the TCM, it’s very often present when the TCM has failed and is setting other, more specific transmission codes. Replacing a faulty TCM will resolve the underlying issue causing the P0700 code.
What if I have a different part number on my old module?
This module, service number 24252114, is a common replacement for many different original part numbers due to factory updates and consolidations. It is interchangeable with numbers like 24234503, 24242391, and others listed in the product details.