Restore Your Truck’s Transmission Performance
Is your 2007 GMC Sierra 2500 experiencing erratic shifting, getting stuck in gear, or throwing transmission-related check engine lights? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every gear change, managing torque converter lockup, and ensuring smooth, efficient operation. When it fails, it can cripple your truck’s performance and reliability. This genuine quality T42 TCM, service part number 24240449, is the definitive solution to get your Sierra shifting like new again.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We pre-program each module to your truck’s specific Vehicle Identification Number (VIN) before it ships. This critical step ensures seamless communication between the TCM and your vehicle’s other electronic systems, eliminating the need for expensive and time-consuming programming at a dealership. Simply install the module, and you’re ready to go.
From the Diagnostic Bay
We had a 2007 Sierra 2500 come into the shop with a P0752 code (Shift Solenoid ‘A’ Stuck On). The owner had already replaced the solenoid inside the transmission pan twice, but the problem persisted. He was frustrated and about to condemn the entire transmission. We hooked up our diagnostic scanner and monitored the command signals from the TCM. We saw the module was commanding the solenoid on but wasn’t receiving the correct feedback. After a quick check of the wiring, we identified the driver circuit inside the original TCM had failed. We installed one of our VIN-programmed modules, cleared the codes, and the truck shifted perfectly. It’s a common scenario where the root cause is electronic, not mechanical.
Symptoms of a Failing 2007 Sierra 2500 TCM
A faulty transmission module can manifest in various ways, often mimicking internal transmission problems. If you’re noticing any of the following issues, your TCM is the likely culprit. Replacing the module can save you from a costly and unnecessary transmission rebuild.
- ✔ Harsh, delayed, or unpredictable gear shifts.
- ✔ The vehicle enters “limp mode,” often stuck in 2nd or 3rd gear.
- ✔ An illuminated Check Engine Light or Transmission Warning Light.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, P0751, or other solenoid-specific codes.
- ✔ Failure to upshift or downshift correctly.
- ✔ A noticeable decrease in fuel economy.
- ✔ Complete loss of communication with the transmission, preventing it from engaging.
Plug-and-Play Installation
This module is designed for a straightforward installation. On most 2007 Sierra 2500 models, the TCM is located in the engine bay, typically next to the battery. The process involves disconnecting the battery, unplugging the electrical connectors from the old module, unbolting it, and installing the new one in its place. Once installed and the battery is reconnected, the pre-programmed software takes over, restoring full functionality. We highly recommend using a basic scan tool to clear any lingering DTCs from the vehicle’s memory after installation. With no core charge, you can keep your old part without the hassle of returning it.
This T42 TCM is a direct replacement for a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, 4L70E, and 4L80E. It interchanges with numerous part numbers, including 24252114, 24234503, 24230461, and 24240449, ensuring broad compatibility and OEM-level performance for your 2007 Sierra 2500 TCM and many other models.
Frequently Asked Questions
What is VIN programming and why is it required?
VIN programming loads your vehicle’s specific software and calibration files onto the TCM. This ensures the module communicates correctly with your engine, ABS, and other systems for optimal shift patterns, fuel economy, and performance. Without it, the vehicle will not operate correctly.
Can I install this module myself?
Yes, installation is generally simple for someone with basic mechanical skills. The TCM is located in the engine compartment for easy access. The entire process typically takes less than 30 minutes. Always disconnect the battery’s negative terminal before starting.
Will this fix my transmission error code P0700?
A P0700 is a general code indicating the TCM has detected a fault. This module often resolves the root cause of the P0700 and the more specific codes that accompany it (like solenoid or sensor codes). However, you should always ensure the wiring and connectors are in good condition.
How can I confirm this part fits my truck?
This module is a confirmed fit for the 2007 GMC Sierra 2500 with the 6.0L engine. It also fits a wide range of other GM vehicles. You can verify fitment by matching your original part number to the interchange list provided or by contacting our support team with your VIN.
Is there a core charge for my old part?
No, there is no core charge associated with this part. You are not required to send your old, faulty module back to us, which simplifies the repair process for you.