Restore Your Truck’s Shifting Performance
Is your 2008-2012 GMC Canyon suffering from harsh shifting, delayed gear engagement, or a persistent check engine light? A faulty Transmission Control Module (TCM) is a common cause of these frustrating issues. This genuine GM T42 TCM, part number 24240400, is the definitive solution to restore the smooth, reliable operation of your automatic transmission. As the electronic brain of your transmission, the TCM controls everything from shift points to torque converter lockup. When it fails, it can mimic a catastrophic transmission failure, but the fix is often much simpler and more affordable.
From the Diagnostic Bay
We had a 2010 Canyon come into the shop with the transmission stuck in 3rd gear—classic limp mode. The owner was convinced he needed a full transmission rebuild, a multi-thousand dollar job. After plugging in our scanner, we pulled a P0752 code, pointing to a ‘Shift Solenoid A Stuck On’ condition. While it could be the solenoid itself, experience with these T42 modules told us to check the controller first. We swapped in a VIN-programmed module, cleared the codes, and took it for a test drive. The truck shifted perfectly through all gears. The customer saved a fortune and was back on the road the same day, all thanks to a simple module replacement.
Symptoms of a Failing T42 TCM
A failing TCM can manifest in various ways. If you’re experiencing any of the following, it’s time to inspect your module:
- ✔ Erratic Shifting: Abrupt, harsh, or delayed gear changes that make driving uncomfortable and unpredictable.
- ✔ Stuck in Gear: The transmission may refuse to shift out of a certain gear, often referred to as “limp mode,” to prevent further damage.
- ✔ Warning Lights: The Check Engine Light or a dedicated transmission warning light will illuminate on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): Common codes associated with TCM failure include P0700 (Transmission Control System Malfunction) and various solenoid-specific codes (P0750-P0774).
- ✔ Poor Fuel Economy: Inefficient shifting and failure to engage the torque converter lockup can lead to a noticeable drop in MPG.
- ✔ No Communication: In severe cases, a scan tool may be unable to communicate with the TCM, indicating a complete module failure.
The Direct Solution: A VIN-Programmed Canyon Transmission Control Module
This isn’t just a replacement part; it’s a complete, ready-to-install solution. The primary benefit is our expert VIN programming service. We flash the module with your truck’s specific Vehicle Identification Number and the latest GM software updates before it ships. This critical step ensures the TCM communicates seamlessly with your vehicle’s other computers, like the Engine Control Module (ECM), right out of the box. You get optimal performance without paying for expensive dealership programming or key relearn procedures.
Built to strict OEM standards, this T42 module ensures long-lasting reliability. It directly replaces a wide range of service numbers, including 24252114, 24234503, 24240400, and more, making it a versatile fix for many GM trucks, vans, and SUVs equipped with 4-speed automatic transmissions like the 4L60E and 4L65E.
Simple, Straightforward Installation
Replacing the TCM on your GMC Canyon is a job most DIY mechanics can handle in under an hour. The module is typically located in the engine compartment on the right-hand (passenger) side, near the rear.
- Safety First: Always disconnect the negative battery terminal before starting any electrical work.
- Locate the Module: Find the TCM on the RH rear of the engine compartment.
- Disconnect and Remove: Carefully unplug the electrical connectors. Be gentle with the locking tabs. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed module in place and securely reconnect the electrical harnesses.
- Final Steps: Reconnect the battery. While the module is plug-and-play, it’s best practice to use a scan tool to clear any stored DTCs from the system.
With no core charge, you can keep your old part without the hassle of shipping it back. Get your truck shifting like new again and order your pre-programmed T42 TCM today!
Frequently Asked Questions
What does ‘VIN Programmed’ mean for this TCM?
It means we load your vehicle’s specific VIN and the latest factory software onto the module before shipping it to you. This ensures it works perfectly with your truck’s engine and other systems without needing any additional programming from a dealership, making it a true plug-and-play part.
Will this module fit vehicles other than a GMC Canyon?
Yes. This T42 TCM is compatible with a wide range of 2006-2014 GM vehicles using 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. This includes models like the Chevrolet Silverado, Tahoe, Colorado, GMC Sierra, Hummer H3, and more. Please verify the part number for your specific application.
Where is the TCM located on a 2008-2012 GMC Canyon?
On the GMC Canyon and its sibling, the Chevrolet Colorado, the Transmission Control Module is typically found in the engine compartment, mounted on the right-hand (passenger) side towards the rear.
Do I need special tools to install this part?
No special tools are required. Basic hand tools, such as a socket set to remove the mounting bolts and a small screwdriver to help with connector tabs, are all that’s typically needed. A code scanner is recommended to clear any stored faults after installation.
Will this fix a P0700 diagnostic trouble code?
A P0700 code is a general fault code indicating that the TCM has detected a problem and has requested the Check Engine Light to be turned on. While this module can resolve the underlying issue causing the P0700, it’s important to have the specific transmission codes (e.g., P07xx) read to confirm the diagnosis.