Restore Smooth Shifting to Your GMC Canyon
Is your 2008-2012 GMC Canyon suffering from jerky shifting, getting stuck in gear, or throwing transmission-related codes? You’re not alone. The Transmission Control Module (TCM), the electronic brain of your automatic transmission, is a common point of failure. This replacement T42 TCM, part number 24239224, is the definitive solution to get your truck back to operating as it should, without the exorbitant cost and hassle of a dealership visit.
As a technician with over two decades of experience, I’ve seen countless GM trucks and SUVs come into the bay with these exact symptoms. More often than not, the root cause isn’t a catastrophic internal transmission failure, but a faulty TCM. This module is responsible for everything from shift timing to torque converter lockup. When it fails, it can mimic a much more serious mechanical problem. This module is pre-programmed to your truck’s specific VIN, making it a true plug-and-play fix for the capable DIYer or professional mechanic.
Case Study: The Misdiagnosed Solenoid
A customer brought in a 2011 Canyon, convinced he needed a new shift solenoid pack. His scanner was showing a P0750-range code, and the truck would intermittently refuse to shift out of 2nd gear. He had already spent money on a new solenoid, but the problem persisted. After a quick data stream analysis, I noticed the TCM was intermittently losing communication. The real culprit wasn’t the solenoid; it was the module failing to command it properly. We installed one of our VIN-programmed TCMs, and the truck was shifting perfectly within 30 minutes. This saved him from a potential transmission teardown and hundreds of dollars in unnecessary labor.
Is Your Canyon Exhibiting These Transmission Problems?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, this module is likely the solution you need for your 2008-2012 Canyon TCM.
- ✔️ Harsh, delayed, or erratic gear shifts that make driving uncomfortable.
- ✔️ The vehicle is stuck in “limp mode,” often locked in 2nd or 3rd gear.
- ✔️ Check Engine Light or Transmission Warning Light is illuminated on your dash.
- ✔️ Diagnostic Trouble Codes (DTCs) are present, such as P0700 (Transmission Control System Malfunction) or various solenoid-specific codes.
- ✔️ A noticeable decrease in fuel economy due to inefficient shifting.
- ✔️ The transmission seems to slip between gears or fails to engage properly from a stop.
A Straightforward Guide to Installation
One of the best features of this module is its ease of installation. You don’t need a lift or specialized transmission tools. For the GMC Canyon, the process is simple:
- Safety First: Always disconnect the negative terminal from your truck’s battery before starting any electrical work.
- Locate the Module: On the 2008-2012 Canyon, the TCM is typically found in the engine bay, on the right-hand (passenger) side 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 module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical harnesses. You should hear a click as they lock.
- Final Steps: Reconnect the battery terminal. While our programming handles the critical setup, it’s always good practice to use a basic OBD2 scan tool to clear any stored fault codes from the vehicle’s memory.
Verified Vehicle Compatibility
This T42 Transmission Control Module is a direct-fit replacement for a wide range of General Motors vehicles. While this page is focused on the 2008-2012 Canyon TCM, it is also compatible with the following models. Please verify your part number (24239224) or contact us with your VIN to ensure perfect fitment.
- 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 / GMC Sierra 1500, 2500 (2007-2013) – Various locations, often 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 other GM cars, trucks, and SUVs from 2006-2014.
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean for me?
It means this module arrives ready for installation right out of the box. We load your vehicle’s specific VIN and the latest GM software onto the module before shipping. This eliminates the need for an expensive trip to the dealership for programming, saving you time and money.
Will this fix my P0700 transmission code?
A P0700 code is a general fault code indicating the TCM has detected a problem. In many cases, a faulty TCM is itself the problem. Replacing it with this module will resolve the P0700 code and any related solenoid codes if the module was the root cause of the failure.
Do I need to send my old TCM back?
No. We do not require a core return. You can keep your old part, which simplifies the process and gets your truck back on the road faster without worrying about core charges or return shipping.
Is this a difficult part for a DIYer to replace?
Not at all. For most models, including the Canyon, this is one of the easier electronic modules to replace. It’s located in the engine bay and requires only basic hand tools. The entire job can typically be completed in under 30 minutes.
What kind of warranty is included?
We stand behind our products. This transmission control module comes with a one-year warranty, giving you peace of mind that you’re installing a reliable, quality part.