Restore Peak Transmission Performance in Your GMC Canyon
Is your 2008-2012 GMC Canyon suffering from erratic shifting, delayed gear engagement, or getting stuck in limp mode? 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 make your reliable truck feel unpredictable and unsafe. This replacement GM T42 TCM, part number YNXS, is the definitive solution, pre-programmed to your truck’s specific VIN for a true plug-and-play installation.
From the Diagnostic Bay
We recently had a 2010 Canyon in the shop that was throwing a P0700 code and shifting violently between first and second gear. The owner had already replaced two shift solenoids based on a generic code reader’s suggestion, with no improvement. After a quick scan with professional equipment, we confirmed the issue was internal to the TCM. Instead of a costly transmission rebuild, we installed one of these VIN-programmed T42 modules. The entire job took less than 30 minutes, and the truck was shifting like it just rolled off the factory floor. It’s a perfect example of how correctly diagnosing the electronic controller can save thousands in unnecessary mechanical repairs.
Common Symptoms of a Failing 2008-2012 Canyon TCM
- ✔ Harsh, abrupt, or jerky gear shifts.
- ✔ The vehicle gets stuck in a single gear (limp mode) and will not shift up or down.
- ✔ Illumination of the Check Engine Light or Transmission Warning Light.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults are present.
- ✔ A noticeable decrease in fuel economy due to inefficient shifting.
- ✔ Complete loss of communication with the transmission module, leading to a no-start or no-shift condition.
Why Choose a VIN-Programmed Module?
This isn’t just a generic, off-the-shelf part. We program each module specifically to your truck’s Vehicle Identification Number (VIN). This critical step ensures that the TCM has the latest GM software and is perfectly calibrated for your vehicle’s specific configuration, including engine size and axle ratio. This eliminates the need for an expensive trip to the dealership for programming, saving you time and money. Simply install the module, clear any old codes, and you’re back on the road with confidence.
Built to meet and exceed original equipment standards, this T42 TCM (interchangeable with part numbers 24252114, 24234503, 24242391, and others) is your reliable fix for a wide range of GM vehicles, including the Colorado, Hummer H3, and various vans and SUVs. Located in the right-hand rear of the engine compartment on your Canyon, installation is straightforward for any DIY mechanic or professional technician.
Frequently Asked Questions
Do I need to have this TCM programmed by a dealer?
No. This module comes pre-programmed to your vehicle’s VIN. Simply provide your VIN at checkout, and the unit will arrive ready for a plug-and-play installation, with no additional programming required.
Where is the TCM located on my 2008-2012 GMC Canyon?
On the 2008-2012 GMC Canyon and its sibling, the Chevrolet Colorado, the Transmission Control Module is typically located in the engine compartment, on the right-hand (passenger) side towards the rear.
Will this fix a P0700 trouble code?
A P0700 code is a generic code indicating that the TCM has detected a fault. While a faulty TCM itself is a very common cause, this code can also be triggered by other transmission issues. However, if you are experiencing shifting problems along with the P0700 code, replacing the TCM is often the correct solution.
Is there a core charge for my old part?
No, we do not require you to send back your old module. There is no core charge associated with this purchase, saving you the hassle and expense of return shipping.
Is this compatible with other GM part numbers?
Yes, this T42 TCM is a direct replacement for a wide range of service numbers, including 24252114, 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, and many others listed in the product description.