Restore Peak Transmission Performance in Your GMC Canyon
Is your 2008-2012 GMC Canyon suffering from erratic shifting, getting stuck in gear, or displaying transmission-related warning lights? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating smooth gear changes, managing torque converter lockup, and ensuring overall drivetrain efficiency. When it fails, it can lead to frustrating and potentially damaging driving conditions. This genuine GM T42 TCM, service part number 24243921, is the definitive solution to restore your truck’s factory performance and reliability.
From the Diagnostic Bay
We once had a 2010 Canyon come in with what the owner was sure was a completely failed transmission. It was banging into gear and wouldn’t shift past 2nd. Another shop had quoted him thousands for a full transmission rebuild. We hooked up our scanner and found a series of solenoid circuit codes and a generic P0700 code. Instead of tearing down the transmission, we checked the TCM connections and data. The module was intermittently losing communication. We installed a VIN-programmed T42 TCM, cleared the codes, and the truck shifted like it just rolled off the assembly line. It saved the customer a massive headache and an unnecessary, expensive repair.
Is Your GMC Canyon Showing Signs of a Bad TCM?
A faulty TCM can manifest in various ways, often being misdiagnosed as a major mechanical failure. If you’re experiencing any of the following symptoms, your transmission module is the most likely culprit:
- ✔ Harsh or Delayed Shifting: The truck slams into gear, hesitates between shifts, or feels like it’s slipping.
- ✔ Stuck in Limp Mode: The vehicle will not shift out of a single gear (usually 2nd or 3rd) to prevent further damage.
- ✔ Check Engine & Transmission Lights: The dashboard is illuminated with warnings, often accompanied by Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-specific codes.
- ✔ Poor Fuel Economy: Inefficient shifting and torque converter operation can lead to a noticeable drop in MPG.
- ✔ No Upshift or Downshift: The transmission refuses to shift up or down as you accelerate or decelerate.
- ✔ Complete Communication Loss: In severe cases, the vehicle may not start or move at all due to a total failure of the TCM.
The Superior Solution: A VIN-Programmed 2008-2012 Canyon TCM
Don’t settle for a generic, unprogrammed module that requires an expensive trip to the dealership. Our T42 TCMs are meticulously prepared for your specific vehicle, offering benefits that get you back on the road faster and with more confidence.
- ✔ Plug-and-Play Installation: We program the module to your truck’s exact Vehicle Identification Number (VIN) before it ships. This ensures it communicates perfectly with your vehicle’s other computers, requiring no additional programming or setup.
- ✔ Latest GM Software: Each module is loaded with the most current software updates from General Motors. This resolves common factory bugs and improves transmission logic for smoother, more reliable operation.
- ✔ OEM-Quality and Reliability: Built to meet or exceed original equipment specifications, this module ensures long-lasting durability and performance. It’s backed by a one-year warranty for your peace of mind.
- ✔ Broad Compatibility: This T42 module is a direct replacement for a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. It interchanges with numerous part numbers, including 24252114, 24234503, and 24243901.
Simple Installation Process
For the 2008-2012 GMC Canyon, the TCM is located in the engine compartment on the right-hand rear side. The replacement process is straightforward for a DIY mechanic with basic tools.
- Safety First: Always disconnect the negative battery terminal before beginning any electrical work.
- Locate and Remove: Identify the TCM and carefully disconnect the electrical connectors. 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.
- Reconnect and Verify: Reconnect the battery. Start the vehicle and check for any warning lights. Use a basic OBD2 scanner to clear any stored DTCs.
Frequently Asked Questions
Do I need to get this TCM programmed by a dealer?
No. This module arrives pre-programmed to your vehicle’s VIN. It is a true plug-and-play solution, saving you the time and expense of a dealership visit.
Where is the TCM located on my 2009 GMC Canyon?
On the 2008-2012 GMC Canyon and its sibling, the Chevrolet Colorado, the Transmission Control Module is typically found in the engine bay, on the right-hand (passenger) side, towards the rear.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause of a P0700, it’s essential to scan for more specific codes (e.g., solenoid circuit faults) to confirm the TCM is the issue. In most cases where other codes point to an internal module failure, this part is the correct fix.
Is there a core charge for this part?
No, there is no core charge. You are not required to send your old, faulty module back to us, making the process simpler and hassle-free.
What transmissions is this T42 TCM compatible with?
This T42 module is designed for a wide range of GM vehicles, primarily those equipped with the 4-speed automatic 4L60E, 4L65E, 4L70E, and 4L80E transmissions from approximately 2006 to 2014.