Restore Your Yukon’s Drivability and Confidence
If you’re dealing with a GMC Yukon that shifts hard, gets stuck in gear, or throws transmission codes, you’ve come to the right place. As a technician with over two decades of experience under the hood, I’ve seen countless drivers frustrated by these exact issues. The problem often isn’t the transmission itself, but its electronic brain: the Transmission Control Module (TCM). This replacement T42 TCM, part number 24235340, is the definitive solution for your 2007-2009 GMC Yukon, arriving pre-programmed to your vehicle’s VIN for a true plug-and-play repair that gets you back on the road without a trip to the dealership.
The TCM is the unsung hero of your drivetrain, constantly managing hydraulic pressures, shift points, and torque converter lockup. When it fails due to heat cycles and vibration, your smooth-riding SUV can feel unpredictable and unsafe. This module restores that lost communication, ensuring crisp, correct shifts and reliable performance, whether you’re towing a trailer or just running errands. By installing this quality-tested 2007-2009 Yukon Transmission Module, you’re not just replacing a part; you’re investing in peace of mind and restoring the vehicle’s original performance.
Case Study: The Ghost in the Transmission
A customer brought in a 2008 Yukon XL with an intermittent but severe problem: it would randomly refuse to shift out of 2nd gear, especially on hot days. They had already replaced two shift solenoids at another shop with no success. The check engine light was on with a generic P0700 code. Instead of just throwing more parts at it, we monitored the TCM data stream. We saw erratic voltage readings from the module itself, even when the solenoids were commanded off. This pointed directly to an internal failure in the TCM, which was overheating and losing its ability to process signals correctly. A new, pre-programmed 2007-2009 Yukon Transmission Module fixed the issue permanently. It’s a classic example of how diagnosing the root cause saves time and money.
Is Your Yukon Experiencing These Transmission Nightmares?
A failing TCM can manifest in several ways. If you notice any of the following, it’s a strong indicator that your module needs attention:
- ✔ Harsh, slamming shifts or delayed gear engagement.
- ✔ Vehicle is stuck in ‘limp mode’ (usually 2nd or 3rd gear) and won’t shift up or down.
- ✔ Check Engine Light or Transmission Warning Light is illuminated with codes like P0700, P0750, or other solenoid-related DTCs.
- ✔ A sudden drop in fuel economy as the transmission isn’t operating in the optimal gear.
- ✔ Complete loss of communication with the transmission, making the vehicle undrivable.
Your 30-Minute Path Back to Smooth Shifting
One of the best features of this part is its simple installation. You don’t need a lift or specialized transmission tools. For most Yukon models, the process is straightforward:
- Safety First: Always disconnect the negative terminal on your vehicle’s battery before starting any electronic component replacement.
- Locate the Module: On the 2007-2009 Yukon, the TCM is typically located in the engine bay, right next to the battery. It’s a silver box with large electrical connectors.
- Swap the Part: Carefully disconnect the wiring harnesses from the old module. Unbolt it from its mounting bracket and set it aside. Bolt the new module in its place.
- Reconnect and Finalize: Securely plug the wiring harnesses into your new module. Reconnect the battery terminal. Start the vehicle and use a basic OBD2 scanner to clear any stored fault codes.
Verified Fitment for Your General Motors Vehicle
While this is the perfect 2007-2009 Yukon Transmission Module, it is also a direct replacement for a wide range of GM cars, trucks, and SUVs equipped with 4-speed automatic transmissions. Please verify your vehicle in the list below. This part is interchangeable with service numbers 24242391, 24234503, 24252114, and others.
This part will fit these makes and models with these options
YUKON 07-09 Transmission; (next to battery)
AVALANCHE 1500 07-08 Transmission; (next to battery)
CANYON 08-12 Transmission; (RH rear engine compartment)
COLORADO 08-12 Transmission; (RH rear engine compartment)
ENVOY 06-09 Transmission; (LH engine compartment)
EXPRESS 1500/2500/3500 VAN 06-14 Transmission; (RH engine compartment)
HUMMER H3 08-10 Transmission; (RH rear engine compartment)
SAVANA 1500/2500/3500 VAN 06-14 Transmission; (RH engine compartment)
SIERRA 1500 PICKUP 07-13 Transmission; (next to battery)
SIERRA 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (next to battery)
SILVERADO 1500 PICKUP 07-13 Transmission; (next to battery)
SILVERADO 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (next to battery)
SUBURBAN 1500 07-08 Transmission; (next to battery)
TAHOE 07-09 Transmission; (next to battery)
TRAILBLAZER 06-09 Transmission; (LH engine compartment)
… and many more GM models.
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean for me?
It means we load your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM software onto the module before we ship it. This ensures it communicates perfectly with your engine computer and other systems right out of the box, just like a part from the dealer, but without the extra cost and appointment for programming.
Do I need any special tools for this installation?
No. Basic hand tools, like a socket set to remove the mounting bolts and disconnect the battery, are all you need. The most important part is ensuring the electrical connectors are seated firmly upon reinstallation.
Will this fix a P0700 transmission fault code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause (like internal shorts or failures that trigger other codes), you should always confirm the specific codes stored in the TCM. If the TCM itself is the faulty component, then yes, this part is the solution.
Is there a core charge? Do I have to send my old part back?
No, there is no core charge on this module. You can keep your old part, which saves you the time, hassle, and expense of return shipping.