Fix Your GMC Canyon’s Shifting Problems for Good
Is your 2008-2012 GMC Canyon giving you transmission headaches? From my 20+ years in the garage, I can tell you that symptoms like harsh shifting, getting stuck in gear, or a sudden check engine light are often traced back to one culprit: a failing Transmission Control Module (TCM). This isn’t just an annoyance; it’s a critical failure that can leave you stranded in limp mode. This T42 Transmission Control Module (TCM), part number 24243921, is the reliable, straightforward solution to restore your truck’s performance and peace of mind.
The biggest hurdle with electronic module replacement has always been the expensive and time-consuming trip to the dealership for programming. We eliminate that step entirely. By providing us with your vehicle’s VIN during checkout, we program the module with the latest GM software updates specifically for your truck. When it arrives, it’s a true plug-and-play part, ready to be installed in your driveway or service bay. This is the definitive fix for a faulty 2008-2012 Canyon TCM, getting you back on the road quickly and affordably.
Case Study: The ‘Intermittent’ Canyon Failure
A customer brought in an ’09 Canyon with a frustrating problem: it drove perfectly when cold, but after 20 minutes of driving, it would slam into gear and occasionally get stuck in 3rd. No consistent codes, just a generic P0700 when the issue was active. This intermittent behavior is a classic sign of a TCM failing due to heat soak. The internal circuits expand and lose connection. We swapped in a VIN-programmed T42 module, and the problem was solved instantly. The owner saved hundreds compared to a dealership diagnosis and replacement.
Is Your Canyon Exhibiting These Transmission Issues?
- ✔ Harsh, erratic, or delayed gear shifts.
- ✔ Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-related faults.
- ✔ The transmission refuses to upshift or downshift properly.
- ✔ A noticeable decrease in fuel economy.
- ✔ The torque converter fails to lock up, leading to higher RPMs at cruising speed.
A Straightforward Guide to Installation
- ✔ 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 compartment on the right-hand (passenger) side, towards the rear.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. Then, 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. You should hear a click as they lock in.
- ✔ Reconnect and Verify: Reconnect the battery terminal. Start the engine and let it idle for a few minutes. Use a basic OBD2 scan tool to clear any stored fault codes from the memory. Test drive the vehicle to confirm smooth shifting has been restored.
Will This Fit My Vehicle?
This T42 TCM is a direct-fit replacement for a wide range of General Motors vehicles. While it is the correct part for the 2008-2012 Canyon TCM, it also fits the following models. Please verify your specific application.
This part will fit these makes and models with these options
ALLURE 06-09 Transmission; (lower air cleaner housing)
AVALANCHE 1500 07-08 Transmission; (next to battery)
AURA 07-09 Transmission; (LH frame rail front)
CANYON 08-12 Transmission; (RH rear engine compartment)
COBALT 06-10 Transmission; (LH strut tower)
COLORADO 08-12 Transmission; (RH rear engine compartment)
DTS 06-11 Transmission; (RH front 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)
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)
G5 07-10 Transmission; (LH strut tower)
G6 06-10 Transmission; (LH strut tower)
GRAND PRIX 06-08 Transmission; (lower air cleaner housing)
HHR 06-11 Transmission; (LH engine compartment)
HUMMER H3 08-10 Transmission; (RH rear engine compartment)
IMPALA 06-11 Transmission; (lower air cleaner housing)
ION 06-07 Transmission; (behind LH strut tower)
LACROSSE 06-09 Transmission; (lower air cleaner housing)
LUCERNE 06-07 Transmission; (4.6L), (LH engine compartment)
LUCERNE 08-11 Transmission; (LH engine compartment)
MALIBU 06-10 Transmission; (LH frame rail)
MONTANA 06-09 Transmission; (LH strut tower)
MONTE CARLO 06-07 Transmission; (lower air cleaner housing)
PURSUIT 06 Transmission; (LH strut tower)
RAINIER 06-07 Transmission
RENDEZVOUS 06-07 Transmission; (air cleaner box)
SAAB 9-7X 06-09 Transmission; (LH 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)
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
SIERRA 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (next to battery)
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
SILVERADO 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (next to battery)
SSR 05-06 Transmission; (front LH frame)
SUBURBAN 1500 07-08 Transmission; (next to battery)
TAHOE 07 Transmission; (next to battery)
TAHOE 08-09 Transmission; (next to battery), w/o auxiliary oil cooler pump
TERRAZA 06-07 Transmission; (LH strut tower)
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)
UPLANDER 06-09 Transmission; (LH strut tower)
VUE 07-08 Transmission; 2.4L, (LH front engine compartment)
VUE 09 Transmission; 2.4L, w/hybrid, LH side front engine compartment, (shift control)
VUE 09 Transmission; 2.4L, w/o hybrid; (LH front engine compartment)
VUE 10 Transmission
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)
Do I need to have this TCM programmed by a dealer?
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 module will arrive ready for plug-and-play installation, saving you time and money.
Where is the TCM located on my 2010 GMC Canyon?
For the 2008-2012 GMC Canyon and Chevrolet Colorado, the TCM is located in the engine bay, on the right-hand (passenger) side, near the firewall.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer (ECM) to turn on the check engine light. While a faulty TCM is a very common cause, this code indicates a transmission-related issue that could also stem from solenoids or wiring. Replacing the TCM often resolves the root cause of the P0700 code.
Is there a core charge for this part?
No, there is no core charge. You are not required to send your old module back to us, making the process faster and more convenient for you.