Restore Flawless Shifting to Your GM Truck
If your 2007 Silverado 2500 is suffering from harsh shifts, getting stuck in gear, or throwing transmission codes, the culprit is often a failing Transmission Control Module (TCM). As the brain of your automatic transmission, a faulty TCM can make your dependable workhorse feel unreliable and unsafe. This direct-replacement T42 TCM, part number YNXS, is the definitive solution. It arrives expertly programmed to your truck’s specific VIN, eliminating the need for expensive dealership visits and ensuring a seamless plug-and-play installation right out of the box.
A Technician’s Notebook: The Intermittent Limp Mode Nightmare
I had a 2007 Silverado 2500 HD with the 6.0L and 4L80E transmission come into my shop that was giving the owner fits. The truck would randomly go into limp mode (stuck in 3rd gear) with a P0700 code, but only after it was fully warmed up and driven for 20+ minutes. We checked the wiring, the solenoids, and the fluid—all perfect. The issue was heat-soak affecting the internal circuits of the original TCM. After swapping in one of our VIN-programmed T42 modules, the problem vanished completely. This isn’t just a part replacement; it’s a permanent fix for a very common and frustrating diagnostic headache.
Is Your Silverado Exhibiting These Transmission Faults?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement. A new 2007 Silverado 2500 TCM is often the most effective way to resolve these issues.
- ✔ Unpredictable, harsh, or delayed gear shifts.
- ✔ Vehicle is stuck in “limp mode,” typically second or third gear.
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-related faults.
- ✔ Failure to upshift or downshift properly, leading to poor acceleration.
- ✔ Noticeable decrease in fuel economy.
- ✔ Communication errors between the TCM and other vehicle modules.
Straightforward Installation Guide: Back on the Road in Under an Hour
You don’t need to be a master mechanic to install this module. The process is simple and can be completed with basic hand tools in your own driveway. For the 2007 Silverado 2500 TCM, the location is typically next to the battery in the engine compartment.
- Safety First: Always disconnect the negative terminal from your truck’s battery before starting any electrical work.
- Locate the Module: On your Silverado, find the TCM mounted next to the battery. It will have several large electrical connectors.
- Disconnect and Remove: Carefully unclip the wiring harnesses. Then, unbolt the module from its mounting bracket and remove it from the vehicle.
- Install the New TCM: Mount your new, pre-programmed module onto the bracket and securely reconnect the wiring harnesses. Ensure they click into place.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s good practice to use a basic scan tool to clear any stored fault codes from the vehicle’s memory.
Verified Vehicle Compatibility List
This T42 TCM is a direct fit for a wide range of General Motors vehicles. While this page focuses on the 2007 Silverado 2500 TCM, please verify your model and year in the list below. This part is interchangeable with service numbers including 24252114, 24234503, 24230461, and YNXS.
Partial Fitment List:
- CHEVROLET SILVERADO 2500 PICKUP 07 (new style, smooth door skin), 6.0L, (next to battery)
- GMC SIERRA 2500 PICKUP 07 (new style, smooth door skin), 6.0L, (next to battery)
- CHEVROLET & GMC VANS (EXPRESS, SAVANA) 1500/2500/3500 06-14 (RH engine compartment)
- CHEVROLET & GMC TRUCKS (SILVERADO, SIERRA) 1500 07-13 (next to battery)
- CHEVROLET TAHOE & SUBURBAN 07-09 (next to battery)
- GMC YUKON & YUKON XL 07-09 (next to battery)
- HUMMER H3 08-10 (RH rear engine compartment)
- CADILLAC DTS 06-11 (RH front engine compartment)
… and many other GM cars, trucks, and SUVs from 2006-2014.
Frequently Asked Questions
Do I need to have this TCM programmed by a dealer?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN at checkout, and the module will arrive ready for immediate installation, saving you hundreds in dealership fees.
What is a T42 TCM?
The T42 is the specific hardware platform used by General Motors for the transmission control module in a wide variety of vehicles, primarily those equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L80E during the 2006-2014 model years.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer (ECM) to turn on the check engine light. While a faulty TCM is a very common cause, this code can also be triggered by internal transmission issues or wiring problems. However, if you are also experiencing shifting symptoms, replacing the TCM is the most likely solution.
Is there a core charge for my old part?
No, there is no core charge required for this part. You can keep your old module or dispose of it without the hassle of returning it.