Restore Flawless 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 the electronic brain of your automatic transmission, the TCM dictates every shift point and clutch engagement. When it fails, drivability suffers, and you’re left with an unreliable truck. This OEM-quality T42 TCM, part number 24256960, is the definitive solution, arriving pre-programmed to your truck’s specific VIN for a true plug-and-play repair.
Case Study: A Tricky Diagnosis
A customer brought his 2011 GMC Canyon into my shop, complaining it was stuck in what felt like third gear—a classic case of ‘limp mode.’ The check engine light was on, and my scan tool pulled a P0700 (Transmission Control System Malfunction) and a few solenoid-specific codes. While solenoid failure is common, I’ve seen these T42 modules cause identical symptoms hundreds of times due to internal circuit board failures from heat and vibration. Instead of starting a costly transmission teardown, we swapped in a VIN-programmed TCM first. Within 30 minutes, the codes were cleared, and the truck was shifting perfectly. This simple replacement saved the customer over a thousand dollars and days of downtime.
Is Your GMC Canyon Exhibiting These Transmission Faults?
A faulty TCM can manifest in several ways. If you’re noticing any of the following, it’s a strong indicator that your module needs replacement. Ignoring these signs can lead to more significant transmission damage down the road.
- ✔ Harsh, slamming shifts or delayed gear engagement.
- ✔ The vehicle is stuck in ‘limp mode’ and will not shift out of 2nd or 3rd gear.
- ✔ Check Engine Light is illuminated with Diagnostic Trouble Codes (DTCs) such as P0700, P0750, P0753, P0758, or other solenoid-related faults.
- ✔ Complete loss of upshifting or downshifting capabilities.
- ✔ A noticeable drop in fuel economy and potential for transmission overheating.
- ✔ Intermittent communication loss with the TCM, causing unpredictable behavior.
A Straightforward Guide to Installing Your 2008-2012 Canyon TCM
One of the best features of this module is its simple installation. You don’t need a lift or specialized transmission tools. For the GMC Canyon and Chevy Colorado, the process is quick and accessible right in the engine bay.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic component replacement.
- Locate the TCM: On your 2008-2012 Canyon, the TCM is typically found in the engine compartment on the right-hand (passenger) side, near the rear of the engine.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Press the release tabs firmly to avoid damaging the clips. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Securely plug in the electrical connectors until they click, ensuring a solid connection.
- Final Steps: Reconnect the negative battery terminal. While the battery disconnect often clears codes, it’s best practice to use a basic OBD2 scan tool to confirm all transmission-related DTCs are erased. Start the vehicle and take it for a test drive to confirm smooth shifting has been restored.
Do I need to take this part to a dealership for programming?
Do I need to take this part to a dealership for programming?
No. This is the biggest benefit of our service. We program the module to your vehicle’s VIN before it ships. When you receive it, it’s ready for immediate installation without any additional programming or dealer visits required.
What is a T42 TCM?
The T42 is the specific hardware platform used by General Motors for the Transmission Control Module in a wide range of vehicles, including the 2008-2012 Canyon. It controls the 4L60E, 4L65E, and 4L70E 4-speed automatic transmissions.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. Often, the root cause is the TCM itself. Replacing a faulty TCM will typically resolve the P0700 code and any related solenoid codes it was triggering.
Is there a core charge for my old part?
No, we do not require a core charge. You can keep your old part, which simplifies the process and saves you the hassle and expense of return shipping.
What if I have other part numbers on my module?
This module is a direct replacement for numerous GM service numbers, including 24252114, 24234503, 24230461, and many others. Please check our detailed fitment list to ensure compatibility.
Verified Vehicle Fitment Information
This T42 Transmission Control Module is compatible with a wide array of General Motors vehicles. While this page focuses on the 2008-2012 Canyon TCM repair, it also fits the following models. Please verify your vehicle and the location notes.
This part will fit these makes and models with these options
CANYON 08-12 Transmission; (RH rear engine compartment)
COLORADO 08-12 Transmission; (RH rear engine compartment)
HUMMER H3 08-10 Transmission; (RH rear engine compartment)
SAVANA 1500 VAN 06-14 Transmission; (RH engine compartment)
SAVANA 2500 VAN 06-14 Transmission; (RH engine compartment)
SAVANA 3500 VAN 06-14 Transmission; (RH engine compartment)
EXPRESS 1500 VAN 06-14 Transmission; (RH engine compartment)
EXPRESS 2500 VAN 06-14 Transmission; (RH engine compartment)
EXPRESS 3500 VAN 06-14 Transmission; (RH engine compartment)
ENVOY 06-07 Transmission; (LH engine compartment), (8 cylinder)
ENVOY 08-09 Transmission; (LH engine compartment)
ENVOY XL 06 Transmission; (LH engine compartment), (8 cylinder)
TRAILBLAZER 06-07 Transmission; (LH engine compartment), (8 cylinder)
TRAILBLAZER 08-09 Transmission; (LH engine compartment)
TRAILBLAZER EXT 06 Transmission; (LH engine compartment), (8 cylinder)
SAAB 9-7X 06-09 Transmission; (LH engine compartment)
HHR 06-11 Transmission; (LH engine compartment)
DTS 06-11 Transmission; (RH front engine compartment)
LUCERNE 06-07 Transmission; (4.6L), (LH engine compartment)
LUCERNE 08-11 Transmission; (LH engine compartment)
RAINIER 06-07 Transmission
SILVERADO 1500 PICKUP 07 Transmission; (new style, smooth door skin), (next to battery)
SILVERADO 1500 PICKUP 08 Transmission; (next to battery)
SILVERADO 1500 PICKUP 09-13 Transmission; (next to battery), w/o hybrid option
SIERRA 1500 PICKUP 07 Transmission; (new style, smooth door skin), (next to battery)
SIERRA 1500 PICKUP 08 Transmission; (next to battery)
SIERRA 1500 PICKUP 09-13 Transmission; (next to battery), w/o hybrid option
SILVERADO 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (next to battery)
SIERRA 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (next to battery)
TAHOE 07 Transmission; (next to battery)
TAHOE 08-09 Transmission; (next to battery), w/o auxiliary oil cooler pump
YUKON 07 Transmission; (next to battery)
YUKON 08 Transmission; (next to battery), w/o auxiliary oil cooler control
YUKON 09 Transmission; (next to battery), w/o auxiliary oil cooler pump
YUKON XL 1500 07-08 Transmission; (next to battery)
SUBURBAN 1500 07-08 Transmission; (next to battery)
AVALANCHE 1500 07-08 Transmission; (next to battery)
SSR 05-06 Transmission; (front LH frame)
IMPALA 06-11 Transmission; (lower air cleaner housing)
MONTE CARLO 06-07 Transmission; (lower air cleaner housing)
GRAND PRIX 06-08 Transmission; (lower air cleaner housing)
LACROSSE 06-09 Transmission; (lower air cleaner housing)
ALLURE 06-09 Transmission; (lower air cleaner housing)
RENDEZVOUS 06-07 Transmission; (air cleaner box)
COBALT 06-10 Transmission; (LH strut tower)
G5 07-10 Transmission; (LH strut tower)
G6 06-10 Transmission; (LH strut tower)
ION 06-07 Transmission; (behind LH strut tower)
PURSUIT 06 Transmission; (LH strut tower)
MALIBU 06-10 Transmission; (LH frame rail)
AURA 07-09 Transmission; (LH frame rail front)
VUE 07-08 Transmission; 2.4L, (LH front engine compartment)
VUE 09 Transmission; 2.4L, w/o hybrid; (LH front engine compartment)
VUE 09 Transmission; 2.4L, w/hybrid, LH side front engine compartment, (shift control)
VUE 10 Transmission
MONTANA 06-09 Transmission; (LH strut tower)
TERRAZA 06-07 Transmission; (LH strut tower)
UPLANDER 06-09 Transmission; (LH strut tower)