Fix Your Sierra’s Shifting Problems for Good
If you’re dealing with a GMC Sierra that’s shifting harshly, getting stuck in gear, or throwing transmission codes, you know how frustrating it can be. As a technician with over two decades of experience, I’ve seen countless trucks come into the bay with these exact issues. More often than not, the culprit is a failing Transmission Control Module (TCM). This isn’t just an annoyance; it affects your truck’s performance, fuel economy, and reliability. This T42 series TCM, part number 24252114, is the definitive, hassle-free solution for your 2007-2013 Sierra 1500 Pickup and a wide range of other GM vehicles.
The TCM is the brain of your automatic transmission, controlling everything from shift points to torque converter lockup. When it fails, communication between the engine and transmission breaks down, leading to the symptoms you’re likely experiencing. Our modules are meticulously prepared and pre-programmed to your vehicle’s specific VIN, ensuring a seamless, plug-and-play installation without a costly trip to the dealership for software flashing. Get your truck’s transmission operating smoothly and predictably again.
Case Study: A Tricky Diagnosis
A customer brought in his 2011 Sierra 1500, complaining of intermittent ‘limp mode’ where the truck would get stuck in 3rd gear, especially on hot days. He’d already replaced a shift solenoid based on a code, but the problem persisted. After hooking up my scan tool, I noticed erratic data from the TCM and a history of communication loss codes (U-codes) alongside the P0700. This pattern is a classic sign of internal TCM failure, where heat causes microfractures in the circuit board. We installed one of our VIN-programmed T42 modules, and the truck’s shifting performance was immediately restored. The customer saved hundreds by avoiding a dealership visit and got a reliable fix that addressed the root cause.
Is Your Sierra’s Transmission Showing These Symptoms?
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.
- âś” Harsh, erratic, or delayed gear shifts.
- âś” The vehicle is stuck in a single gear (often called ‘limp mode’).
- âś” Check Engine Light or Transmission Warning Light is illuminated.
- âś” Diagnostic Trouble Codes (DTCs) are present, such as P0700 (Transmission Control System Malfunction), P0750-P0758 (Shift Solenoid errors), or U-series communication codes.
- âś” The transmission refuses to upshift or downshift correctly.
- âś” A noticeable decrease in fuel efficiency.
A Straightforward Guide to Installation
One of the biggest benefits of this module is its simple installation. You don’t need to be a master mechanic to get this job done in your own driveway in about 30 minutes.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts and to help reset the vehicle’s computer systems.
- Locate the TCM: On the 2007-2013 Sierra 1500, the TCM is typically located in the engine bay, right next to the battery. It’s a silver box with a few large electrical connectors.
- Disconnect and Remove: Carefully unplug the electrical connectors. There may be locking tabs you need to release. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, VIN-programmed TCM into place. Securely reconnect the electrical connectors, ensuring they click into place.
- Final Steps: Reconnect the negative battery terminal. While the module is plug-and-play, it’s always best practice to use a basic OBD2 scan tool to clear any stored fault codes from the system. Start the vehicle and enjoy smooth shifting!
Why Choose Our 2007-2013 Sierra 1500 TCM?
This isn’t just a replacement part; it’s a comprehensive solution. By ordering from us, you get a component built to strict OEM standards, ensuring longevity and performance. The critical VIN-programming service we provide means the module arrives ready to install, perfectly matched to your truck’s factory settings. This eliminates the need for expensive dealer-only tools and programming fees, saving you time and money. With a one-year warranty and no core charge, it’s a confident, no-hassle repair.
Verified Vehicle Compatibility
This T42 Transmission Control Module is a direct fit for the 2007-2013 GMC Sierra 1500 Pickup (for 2007 models, this fits the ‘new style’ with the smooth door skin, located next to the battery). It is also compatible with a vast range of other General Motors vehicles. Please verify your part number (24252114) or check the list below. This part is interchangeable with: 24234503, 24230461, 24234274, 24235340, and others.
Partial Fitment List:
- Chevrolet Silverado 1500 (2007-2013)
- Chevrolet Tahoe & Suburban (2007-2009)
- GMC Yukon / Yukon XL (2007-2009)
- Chevrolet Express / GMC Savana Vans (2006-2014)
- Cadillac DTS (2006-2011)
- Buick LaCrosse / Lucerne (2006-2011)
- Chevrolet Impala (2006-2011)
- And many more models listed in the full fitment data.
Frequently Asked Questions
Do I need to take my truck to the dealer after installation?
No. This Transmission Control Module comes pre-programmed to your vehicle’s VIN. It is a true plug-and-play solution, requiring no additional programming or flashing from a dealership.
Is this part difficult to install for a DIYer?
Not at all. For most Sierra and Silverado models, the TCM is easily accessible next to the battery in the engine bay. With basic hand tools, the replacement can be completed in under 30 minutes.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause (especially when paired with other transmission codes), you should ensure there are no underlying mechanical issues. However, a faulty TCM is the most common source of this code.
What is a core charge?
A core charge is a deposit you pay until you return your old part. We do not have a core charge on this item, so you can keep your old module without any hassle or need to return it.
How do I provide my VIN for programming?
During the checkout process, you will be prompted to enter your vehicle’s 17-digit VIN. We use this to load the correct software for your specific truck, ensuring perfect compatibility.