Restore Peak Performance to Your Silverado’s Transmission
If your 2007-2013 Chevrolet Silverado 1500 is suffering from harsh shifting, getting stuck in gear, or throwing transmission codes, the problem often points directly to a failing Transmission Control Module (TCM). As the brain of your automatic transmission, the TCM is responsible for every gear change. When it falters, it can make your reliable workhorse feel unpredictable and unsafe. This T42 series TCM, corresponding to part number YNXS, is the definitive solution to restore the crisp, smooth shifting you expect from your truck.
Over my two decades in automotive diagnostics, I’ve seen countless truck owners worry they need a complete transmission rebuild, costing thousands. More often than not, especially with symptoms like sudden limp mode or erratic electronic behavior, the culprit is this module. We make the fix simple by pre-programming this unit to your truck’s specific VIN. This means no expensive trips to the dealership for programming—it arrives ready for a true plug-and-play installation, getting you back on the road with confidence.
From the Diagnostic Bay: The Silverado That Didn’t Need a New Transmission
A customer brought in his ’11 Silverado 1500, convinced the transmission was shot. It was slamming into gear and wouldn’t shift past 3rd. He was getting quotes for over $3,500 for a replacement transmission. I hooked up my scan tool and saw a P0700 (Transmission Control System Malfunction) and a few solenoid circuit codes. Instead of jumping to the worst-case scenario, I checked the TCM. After swapping in a VIN-programmed module, every single issue disappeared. The truck shifted like it just rolled off the factory floor. It was a $3,000+ save for the customer, all because we addressed the electronic brain, not the mechanical guts.
Is Your Silverado Showing These Warning Signs?
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ Vehicle is stuck in “limp mode” and will not shift out of 2nd or 3rd gear.
- ✔ The Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, P0753, P0758, or other solenoid-related faults.
- ✔ A noticeable decrease in fuel economy due to inefficient shifting.
- ✔ Complete loss of communication with the transmission module.
Your 30-Minute Path to Smooth Shifting
Installing your new 2007-2013 Silverado 1500 TCM is a straightforward job that most DIYers can handle in their own driveway. On these trucks, the module is typically located in the engine bay, right next to the battery.
- 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 Old TCM: Find the module mounted next to the battery. It will have several large electrical connectors attached.
- Disconnect and Remove: Carefully unclip the wiring harnesses. Be gentle with the plastic tabs. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, VIN-programmed TCM into place. Securely reconnect the wiring harnesses, ensuring they click into place.
- Final Steps: Reconnect the negative battery terminal. While the module is plug-and-play, it’s good practice to use a basic OBD2 scan tool to clear any stored fault codes from the previous failure. Start the engine and enjoy your smooth-shifting transmission!
Verified Fitment for Your GM Vehicle
This T42 Transmission Control Module is a direct-fit replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. While this listing is focused on the 2007-2013 Silverado 1500 TCM, it is also compatible with the following models (please verify location and options):
- Chevrolet Silverado/GMC Sierra 1500, 2500 (2007-2013)
- Chevrolet Tahoe/GMC Yukon (2007-2009)
- Chevrolet Suburban/GMC Yukon XL 1500 (2007-2008)
- Chevrolet Avalanche 1500 (2007-2008)
- Chevrolet Express/GMC Savana Vans (2006-2014)
- Hummer H3 (2008-2010)
- And many other GM cars, trucks, and SUVs from 2006-2014. This part interchanges with numbers 24252114, 24234503, 24242391, and YNXS.
Frequently Asked Questions
What does “VIN Programmed” mean for me?
It means this module arrives ready for installation right out of the box. We load it with your truck’s specific Vehicle Identification Number (VIN) and the latest GM software, so it communicates perfectly with your vehicle’s other computers without requiring a trip to a dealer for expensive programming.
Do I need any special tools for this installation?
No special tools are required. Basic hand tools, like a socket set to remove the mounting bolts and disconnect the battery, are all you need. The entire process typically takes less than 30 minutes.
Is there a core charge for my old part?
No, there is absolutely no core charge. You can keep your old module or dispose of it without the hassle of shipping it back to us, saving you time and money.
What kind of warranty comes with this TCM?
This part is backed by our comprehensive one-year warranty, giving you peace of mind and protection against any defects. We stand by the quality and reliability of our programmed electronics.
Will this fix a P0700 check engine light code?
Yes, in many cases. The P0700 code is a general fault code indicating the TCM has detected a problem. If the TCM itself is the source of the failure, replacing it with this programmed unit will resolve the root cause and allow the code to be cleared.