Restore Your Truck’s Shifting Performance
If your 2008-2012 GMC Canyon is suffering from harsh shifting, getting stuck in gear, or throwing transmission codes, the problem is often a faulty Transmission Control Module (TCM). As the electronic brain of your automatic transmission, the TCM dictates every gear change and torque converter operation. When it fails, drivability suffers, and you’re often left with an unreliable vehicle. This T42 TCM, part number 24235754, is the definitive, hassle-free solution to get your truck running right again.
Over my 20 years in diagnostics, I’ve seen countless GM trucks and SUVs sidelined by TCM failure. The symptoms can be intermittent at first, leading to frustrating diagnostic dead ends. But a consistent pattern of erratic shifts, a lit check engine light with a P0700 code, or the dreaded ‘limp mode’ almost always points back to this module. This isn’t just a part; it’s a direct fix for some of the most common and annoying transmission problems on these vehicles.
Case Study: A Tricky Diagnosis
A customer brought in his 2011 Canyon, complaining that it would randomly refuse to shift out of 2nd gear, especially after it warmed up. He’d already replaced a shift solenoid with no luck. A quick scan showed a general transmission fault (P0700) and an intermittent solenoid circuit code. Instead of chasing electrical gremlins through the harness, we looked at the common denominator: the TCM. After installing one of our pre-programmed modules, the problem vanished. The customer saved hundreds by avoiding a dealership visit and unnecessary parts swaps. This is a classic TCM failure scenario.
Is Your Canyon Exhibiting These Telltale Signs?
A failing TCM will give you clear warnings. If you’re experiencing any of the following, it’s time to consider a replacement:
- ✔ Harsh, slamming, or erratic gear shifts.
- ✔ The vehicle is stuck in a single gear (often called ‘limp mode’).
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ Check Engine Light or Transmission Warning Light is on with codes like P0700, P0750, or other solenoid-related faults.
- ✔ Complete loss of upshifting or downshifting capabilities.
- ✔ Poor fuel economy and a feeling of sluggish performance.
A Straightforward Guide to Installation
One of the best features of this module is its simple, plug-and-play installation. Because we program it to your vehicle’s VIN before shipping, you don’t need a trip to the dealer. For a handy DIYer, this is a job you can do in your own driveway in under 30 minutes.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: On the 2008-2012 GMC Canyon, the TCM is typically found in the engine bay, on the right-hand (passenger) side rear of the compartment.
- Swap the Part: Carefully disconnect the electrical connectors and unbolt the old module. Secure the new module in its place and firmly reconnect the wiring harnesses.
- Final Steps: Reconnect the battery terminal. While the system may reset on its own, it’s best practice to use a basic OBD2 scan tool to clear any stored diagnostic trouble codes (DTCs) from the computer’s memory.
Verified Fitment for Your General Motors Vehicle
This T42 TCM is a direct replacement for part number 24235754 and other interchangeable numbers. While this page is focused on the 2008-2012 Canyon TCM, this module also fits a wide range of GM vehicles equipped with 4-speed automatic transmissions (4L60E, 4L65E, 4L70E). Please verify your part number or contact us for fitment confirmation.
Partial compatibility list:
- GMC Canyon: 2008-2012 (RH rear engine compartment)
- Chevrolet Colorado: 2008-2012 (RH rear engine compartment)
- Hummer H3: 2008-2010 (RH rear engine compartment)
- Chevrolet Silverado & GMC Sierra 1500/2500: 2007-2013 (Varies, often next to battery)
- Chevrolet Tahoe & GMC Yukon: 2007-2009 (Varies, often next to battery)
- Chevrolet Express & GMC Savana Vans: 2006-2014 (RH engine compartment)
- And many more GM cars, trucks, and SUVs.
Frequently Asked Questions
What exactly does ‘VIN Programmed’ mean?
It means we flash the module with your vehicle’s unique 17-digit Vehicle Identification Number (VIN) and the latest GM software before it ships. This ensures it communicates perfectly with your truck’s other computers (like the ECM) right out of the box, eliminating the need for expensive dealership programming.
Do I need to take this to a mechanic after installation?
No. This is a true plug-and-play solution. As long as it’s installed correctly, no further programming or professional service is required. Simply clear any old codes with a scan tool, and you’re ready to drive.
Where is the TCM on my 2010 GMC Canyon?
For the 2008-2012 GMC Canyon and its sibling, the Chevy Colorado, the TCM is located in the engine bay, specifically on the passenger side towards the rear of the compartment.
Will this TCM fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer to turn on the check engine light. While this module often resolves the underlying issue causing the P0700, you should always scan for other transmission-specific codes (like P0750-P0758) to confirm the diagnosis.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module or dispose of it without the hassle of sending it back to us, simplifying your repair process.