Restore Your Sierra’s Shifting Performance
As a technician with over two decades of experience, I’ve seen countless GMC Sierra and Chevy Silverado trucks roll into the bay with frustrating transmission issues. More often than not, the culprit isn’t a catastrophic mechanical failure but a faulty Transmission Control Module (TCM). This module, part number 24255280, is the electronic brain of your 4L60E, 4L65E, or 4L70E automatic transmission. It governs everything from shift points and line pressure to torque converter lockup. When it fails, your dependable truck can become unpredictable and unsafe.
This isn’t just a replacement part; it’s a permanent fix. We pre-program this T42 TCM directly to your truck’s Vehicle Identification Number (VIN) before it ships. This critical step ensures it communicates flawlessly with your vehicle’s other systems, like the Engine Control Module (ECM), right out of the box. You get to skip the expensive and time-consuming trip to the dealership for programming. This is the same solution I’ve used in my own shop to get customers back on the road quickly and confidently, resolving those pesky error codes and restoring the smooth, reliable shifting you expect from your 2007-2013 Sierra 1500 TCM.
Case Study: The Ghost in the Transmission
A customer brought in his ’08 Sierra 1500 with a baffling problem. The truck would randomly slam into gear and sometimes get stuck in 3rd (limp mode), but only after it was fully warmed up. He’d already replaced a shift solenoid based on a code, but the issue persisted. After hooking up my pro-level scan tool and monitoring live data, I noticed the TCC (Torque Converter Clutch) command was erratic. Instead of chasing more mechanical parts, I inspected the TCM. Over years of heat cycles under the hood, the internal circuits had developed micro-fractures, causing intermittent connection loss. A new, VIN-programmed TCM fixed it instantly. This highlights why diagnosing the 2007-2013 Sierra 1500 TCM first can save hundreds in unnecessary repairs.
Is Your Sierra’s Transmission Showing These Signs?
- ✔ Harsh, delayed, or erratic gear shifts that bang or jerk the truck.
- ✔ The vehicle is stuck in a single gear (often called “limp mode”) and won’t shift up or down.
- ✔ Check Engine Light or Transmission Warning Light is on with codes like P0700, P0750, P0753, P0758, or other solenoid-related faults.
- ✔ A noticeable drop in fuel economy as the transmission isn’t operating in the optimal gear.
- ✔ The transmission feels like it’s slipping, where engine RPMs rise but the truck doesn’t accelerate properly.
- ✔ Complete loss of communication with the transmission module, preventing diagnostics.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your truck’s battery to prevent electrical shorts and help reset the vehicle’s computer systems.
- ✔ Locate the TCM: On most 2007-2013 Sierra/Silverado models, the TCM is mounted right next to the battery in the engine compartment. It’s a silver box with large electrical connectors.
- ✔ Disconnect and Remove: Carefully unplug the electrical harness connectors. They have locking tabs that need to be released. Then, unbolt the module from its mounting bracket.
- ✔ Install the New Module: Bolt the new VIN-programmed TCM into place and securely reconnect the electrical harnesses. You should hear a click as they lock.
- ✔ Reconnect and Verify: Reconnect the negative battery terminal. Start the truck and allow it to idle for a few minutes. Use a basic OBD2 scan tool to clear any stored fault codes from the replacement process.
Verified Vehicle Compatibility
This module is a direct replacement for part number 24255280 and other service numbers like 24252114, 24234503, and 24242391. While this page focuses on the 2007-2013 Sierra 1500 TCM, this part fits a wide range of GM vehicles from 2006-2014. Please see the detailed list below and verify your specific model and year. Providing your VIN at checkout is the best way to guarantee a perfect match.
This part will fit these makes and models with these options
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 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
… and many other GM models including Tahoe, Yukon, Suburban, Savana, Express, Impala, and more.
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
No. We handle all the programming for you before shipping. Simply provide your vehicle’s VIN during checkout, and the module will arrive ready for plug-and-play installation.
Where is the TCM located on my 2011 Sierra 1500?
On most 2007-2013 Sierra and Silverado 1500 trucks, the Transmission Control Module is located in the engine bay, mounted on a bracket right next to the battery.
Is this a new or used part?
This is a high-quality, OEM-spec component that has been thoroughly tested and prepared for service. It is backed by our one-year warranty for your peace of mind.
What happens if I don’t provide a VIN?
Providing your VIN is crucial for programming. If you do not provide it, we cannot program the module, and it will not function correctly in your vehicle. This will lead to shipping delays as we will have to contact you to get the information.
Will this fix a P0700 trouble code?
A P0700 code is a generic fault request from the TCM to the ECM to turn on the check engine light. While a failing TCM is a very common cause, this code can also be triggered by other transmission issues. However, if you are also experiencing erratic shifting or other symptoms listed here, replacing the TCM is the most likely solution.