Restore Smooth Shifting to Your 2007 GMC Sierra 2500
Is your GMC Sierra 2500 suffering from harsh, erratic shifting, getting stuck in gear, or throwing transmission-related codes? You’re not alone. The Transmission Control Module (TCM) is the brain of your automatic transmission, and when it fails, it can cause a host of frustrating and potentially damaging problems. This T42 Transmission Control Module, part number 24240449, is the definitive solution, arriving expertly programmed to your truck’s specific VIN for a true plug-and-play repair that gets you back on the road without a trip to the dealership.
Case Study: A Tricky Diagnosis
A customer brought in his ’07 Sierra 2500 with the 6.0L, complaining of intermittent ‘no-shift’ conditions and a check engine light. He’d already replaced a couple of solenoids with no luck. On my scan tool, I saw a generic P0700 code, but digging deeper, I found communication loss codes with the TCM. These modules are notorious for internal circuit board failures from heat and vibration. Instead of a costly transmission rebuild, we installed one of our VIN-programmed TCMs. The communication was instantly restored, all codes cleared, and the truck shifted like it just left the factory. This is a fix I’ve performed hundreds of times, saving my customers thousands.
Is Your Sierra Exhibiting These Telltale Signs?
A failing TCM doesn’t heal itself; it only gets worse. If you’re experiencing any of these symptoms, a faulty module is the likely culprit. This part is designed to permanently resolve these issues.
- ✔ Abrupt, harsh, 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) such as P0700, P0750, or other solenoid-specific codes.
- ✔ Complete failure to upshift or downshift, leading to poor acceleration.
- ✔ A noticeable drop in fuel economy.
A Straightforward Installation Guide for Your Sierra
One of the best features of this module is its simple installation. For a 2007 Sierra 2500 Transmission Control Module, the process is straightforward and can be done in your driveway in under 30 minutes with basic tools.
- Safety First: Always disconnect the negative terminal from your truck’s battery to prevent electrical shorts and reset the system.
- Locate the Module: On your ’07 Sierra (new body style), the TCM is conveniently located right next to the battery in the engine compartment.
- Disconnect and Remove: Carefully unplug the electrical connectors. Note the locking tabs to avoid damage. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Bolt the new, VIN-programmed module into place. Reconnect the electrical harnesses securely until they click.
- Final Steps: Reconnect the battery terminal. Start the vehicle and let it idle for a few moments. While not always necessary, using a basic OBD2 scanner to clear any stored codes is good practice. No dealership visit required!
Verified Fitment for Your GM Vehicle
While this is the perfect part for a 2007 Sierra 2500 Transmission Control Module repair, it also fits a wide range of other GM vehicles. Please verify your model and options below. This part is interchangeable with service numbers: 24252114, 24234503, 24230461, 24234274, 24240449, and more.
- SIERRA 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (next to battery)
- SILVERADO 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (next to battery)
- SIERRA 1500 PICKUP 07-13 Transmission; (next to battery)
- SILVERADO 1500 PICKUP 07-13 Transmission; (next to battery)
- TAHOE 07-09 Transmission; (next to battery)
- YUKON 07-09 Transmission; (next to battery)
- SAVANA 2500/3500 VAN 06-14 Transmission; (RH engine compartment)
- EXPRESS 2500/3500 VAN 06-14 Transmission; (RH engine compartment)
- HUMMER H3 08-10 Transmission; (RH rear engine compartment)
Frequently Asked Questions
What does “VIN Programmed” mean for me?
It means this module arrives ready for installation right out of the box. We flash it with your vehicle’s specific VIN and the latest GM software, so it communicates perfectly with your truck’s systems. This eliminates the need for expensive dealership programming.
Is this a difficult part to install myself?
Not at all. For most trucks like the 2007 Sierra 2500, the TCM is located next to the battery and requires only basic hand tools to replace. The entire job typically takes less than 30 minutes, making it a great DIY-friendly repair.
Will this fix my P0700 check engine light code?
Yes. The P0700 code is a general fault code indicating the TCM has detected a problem. Replacing a faulty TCM with this pre-programmed unit is the direct fix for the root cause of that code and related transmission performance issues.
Do I need to send my old part back?
No, there is no core charge for this module. You can keep or dispose of your old part without any hassle.
What kind of warranty is included?
This module is backed by our one-year, hassle-free warranty, giving you peace of mind and confidence in your repair.