Get Your Sierra Shifting Smoothly Again
Is your GMC Sierra suffering from harsh, delayed, or unpredictable shifting? A faulty Transmission Control Module (TCM) is often the culprit, causing frustrating driving experiences and potentially leaving you stranded. This OEM-quality T42 TCM is the definitive solution, arriving pre-programmed to your truck’s specific VIN. This means no expensive trips to the dealership for programmingโitโs ready for a true plug-and-play installation, restoring the crisp, reliable performance you depend on from your truck.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, this module is designed to be the fix. A failing TCM can manifest in several ways, including:
- Abrupt, jerky, or slipping gear changes
- The vehicle getting stuck in “limp mode” (usually 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-related faults
- Failure to upshift or downshift correctly, leading to poor acceleration and fuel economy
Replacing your old module with our expertly programmed 2007-2013 Sierra 1500 TCM directly addresses the root cause of these electronic failures, providing a lasting and reliable repair.
Features & Benefits
- โ VIN-Programmed for Your Truck: We program this module with your Sierra’s unique Vehicle Identification Number and the latest GM software updates. This ensures perfect communication between the engine and transmission for optimal shift points and performance right out of the box.
- โ Eliminate Dealer Programming: Skip the hassle and high cost of a dealership visit. Our plug-and-play solution saves you time and money, allowing for a straightforward installation at home or by your trusted mechanic.
- โ Restore Peak Performance: A new, correctly programmed TCM re-establishes precise control over torque converter lockup and gear shifts, resulting in a smoother ride, improved fuel efficiency, and the dependable power your truck was built for.
- โ Built to OEM Standards: Engineered to meet or exceed original equipment specifications, this module ensures durability and reliable operation, whether you’re hauling a heavy load or just running errands.
- โ This unit is backed by our one-year replacement warranty.
Expert Insight: The Critical Role of VIN Programming
In modern trucks like the Sierra, the TCM isn’t just a simple computer; it’s the brain of your transmission, constantly communicating with the Engine Control Module (ECM) and other vehicle systems. A generic, unprogrammed module simply won’t work. It lacks the specific software and calibration tablesโlike tire size and axle ratioโthat your truck’s VIN dictates. Our programming process ensures this new module is a perfect digital match for your vehicle, preventing the communication errors that cause persistent shifting problems and fault codes. This is the key to a successful, one-time repair.
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean?
It means we load the module with the specific software and calibration files from General Motors that match your truck’s exact build. When you provide your VIN during checkout, we ensure the TCM is 100% compatible with your engine, transmission, and other factory options, making it ready to install without any further setup.
Will this fix my transmission fault codes like P0700?
Yes. A P0700 code is a general fault code indicating the TCM has detected a problem. This module is designed to resolve the internal electronic failures that trigger P0700 and many other related transmission codes. After installation, we recommend clearing any stored codes with a scan tool.
Is this part difficult to install on my Sierra 1500?
Installation is straightforward for someone with basic mechanical skills. On the 2007-2013 Sierra, the TCM is typically located in the engine bay, next to the battery. The process involves disconnecting the battery, unplugging the electrical connectors, unbolting the old module, and installing the new one. The entire job usually takes less than 30 minutes.
Do I need to send my old part back?
No, there is no core charge for this part. You can keep or dispose of your old module, saving you the hassle and cost of return shipping.
Is this the correct part for vehicles other than the Sierra?
While this listing is focused on the 2007-2013 Sierra 1500 TCM, this T42 module fits a very wide range of GM vehicles, including the Tahoe, Silverado, Yukon, and Express vans. Please check the detailed fitment list on this page or contact us with your VIN to confirm compatibility for your specific vehicle.