Restore Smooth Shifting to Your GMC Canyon
If your 2008-2012 GMC Canyon is suffering from erratic shifting, getting stuck in gear, or throwing transmission codes, the culprit is often a failing Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen firsthand how a faulty TCM can sideline an otherwise reliable truck. This T42 Transmission Control Module, part number 24241806, is the definitive solution to get your Canyon’s automatic transmission operating like new again. It’s the brain behind your gearbox, managing everything from shift points to torque converter clutch engagement, and when it fails, the symptoms are impossible to ignore.
We take the guesswork and high cost out of the repair process. Unlike a standard replacement that requires an expensive trip to the dealership for coding, this module arrives at your door pre-programmed to your truck’s specific Vehicle Identification Number (VIN). This ensures seamless communication with your vehicle’s other computers, like the ECM, for flawless, plug-and-play performance right out of the box. This isn’t just a replacement part; it’s a comprehensive fix for the persistent transmission issues that plague these vehicles.
From the Diagnostic Bay
I remember a customer with a 2010 Canyon who was about to pay for a full transmission rebuild. His truck would intermittently refuse to shift past 2nd gear and had a P0700 code. He was convinced the transmission was mechanically shot. After a quick scan, I suspected the TCM. We swapped in a VIN-programmed module, and in less than an hour of diagnostic and installation time, the truck was shifting perfectly. He saved thousands of dollars by correctly identifying the electronic failure point first. This is a common scenario, and this part is often the simple fix needed.
Is Your GMC Canyon Showing These Symptoms?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s highly likely your module is the problem. A faulty 2008-2012 Canyon TCM can cause significant drivability and safety concerns.
- âś” Harsh, delayed, or erratic gear shifts.
- âś” The vehicle is stuck in a single gear (often called “limp mode”).
- âś” Check Engine Light or Transmission Warning Light is illuminated.
- âś” Diagnostic Trouble Codes (DTCs) are present, such as P0700 (Transmission Control System Malfunction), P0750-P0758 (Shift Solenoid errors), or other transmission-related faults.
- âś” Poor fuel economy and a feeling of sluggish performance.
- âś” Complete loss of communication with the TCM, preventing shifting.
A Straightforward Guide to Installation
One of the best features of this module is its simple installation. For the 2008-2012 GMC Canyon, the process is straightforward enough for a confident DIYer to complete in their own driveway in under 30 minutes.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic component replacement.
- Locate the TCM: On the GMC Canyon and Chevy Colorado from this era, the TCM is typically found in the engine bay, mounted on the right-hand (passenger side) rear of the engine compartment.
- Disconnect and Remove: Carefully unclip the electrical connectors from the old module. 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. Ensure they click into place.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s always best practice to use a basic OBD-II scan tool to clear any stored fault codes from the vehicle’s memory. Start the vehicle and test drive to confirm smooth shifting.
Verified Vehicle Compatibility
This T42 TCM is a direct replacement for part number 24241806 and is interchangeable with a wide range of other GM part numbers. While this page focuses on the 2008-2012 Canyon TCM, it is also compatible with many other GM cars, trucks, and SUVs. Please verify your part number or contact us with your VIN to ensure perfect fitment.
Fits 2008, 2009, 2010, 2011, 2012 GMC Canyon with automatic transmission.
Also fits a broad range of GM models including, but not limited to:
- Chevrolet Colorado, Silverado, Tahoe, Suburban, Impala, HHR, Cobalt
- GMC Sierra, Yukon, Savana, Envoy
- Buick LaCrosse, Lucerne
- Cadillac DTS
- Pontiac G6, Grand Prix
- Hummer H3
- And more from 2006-2014.
What does ‘VIN Programmed’ actually mean?
What does ‘VIN Programmed’ actually mean?
It means we load your vehicle’s unique 17-digit 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, just like the original part. It eliminates the need for dealership programming, saving you time and money.
Do I need to send my old TCM back? Is there a core charge?
No. We do not require a core return for this part. You can keep your old module or dispose of it, making the process hassle-free.
Is this a difficult part to install myself?
For most individuals with basic hand tools, this is a very manageable DIY job. On the GMC Canyon, the TCM is easily accessible in the engine bay. The entire process typically takes less than 30 minutes. Just follow our installation guide above.
What if I install this and still have shifting problems?
While this module fixes the vast majority of electronic shifting issues, transmission problems can sometimes stem from mechanical parts like solenoids or sensors. If issues persist, it’s a good idea to have the transmission fluid level and condition checked, and to scan for any new or different trouble codes that could point to another component.
What warranty is included?
This module comes with a one-year warranty, covering it against any defects. We stand behind the quality of our programmed electronics to give you peace of mind with your purchase.