Is your GMC Sierra’s transmission acting up, with harsh shifts, delayed engagement, or getting stuck in gear? A failing Transmission Control Module (TCM) is often the culprit, disrupting your truck’s reliability and performance. This OEM-quality T42 TCM is the definitive solution, arriving fully programmed to your vehicle’s specific VIN. This means no expensive trips to the dealership for programming—it’s a true plug-and-play fix to get your truck back on the road and shifting like new.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, a faulty TCM is the likely cause. This module is engineered to resolve these exact problems:
- Harsh, erratic, or delayed gear shifts
- Vehicle stuck in “limp mode” (usually 2nd or 3rd gear)
- Check Engine Light or Transmission Warning Light is on
- Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related codes
- Failure to upshift or downshift properly
- Poor fuel economy and potential transmission overheating
Features & Benefits
- ✔ Plug & Play Installation: This module comes pre-programmed to your truck’s VIN using the latest GM software. It’s ready to install right out of the box, saving you hundreds in dealership programming fees.
- ✔ Restore Smooth Shifting: By precisely managing shift points, torque converter lockup, and line pressure, this module eliminates harsh shifting and restores the smooth, predictable performance you rely on.
- ✔ Eliminate Annoying Warning Lights: A properly functioning TCM is critical for clearing persistent transmission-related trouble codes and turning off the check engine light. This programmed 2007-2013 Sierra 1500 T42 TCM is designed to resolve those electronic faults.
- ✔ Built for Reliability: Engineered to meet or exceed original equipment standards, this module ensures long-lasting durability for your workhorse truck, whether you’re hauling a load or just running errands.
- ✔ Guaranteed Protection: This unit is backed by our one-year replacement warranty.
An Expert’s Note on Programming:
Many people buy a used or new unprogrammed TCM thinking they’ve saved money, only to find their vehicle won’t start or shift correctly. GM vehicles of this era have sophisticated anti-theft and communication systems that require the TCM to be perfectly matched to the vehicle’s VIN. Our pre-programming service handles this complex step for you, ensuring all electronic modules communicate correctly from the moment you plug it in. This is the single most important step for a successful repair, and we take care of it for you.
Don’t let a faulty module sideline your truck. This 2007-2013 Sierra 1500 T42 TCM is the most reliable and straightforward way to fix your transmission problems and restore your confidence on the road. With compatibility across a wide range of GM vehicles and part numbers (including 24252114, 24234503, 24242391), you can be sure you’re getting the right part for the job. Order your 2007-2013 Sierra 1500 T42 TCM today and experience the difference a properly programmed module makes.
Frequently Asked Questions
What does a T42 TCM do?
The T42 Transmission Control Module (TCM) is the electronic brain of your automatic transmission. It receives data from various sensors on the engine and vehicle to control shift timing, hydraulic pressure, and torque converter lockup, ensuring smooth and efficient operation.
Is this part difficult to install?
Installation is typically straightforward for someone with basic mechanical skills. The TCM is usually located in the engine bay, often next to the battery or under the air cleaner box. The process involves disconnecting the battery, unplugging the electrical connectors, and unbolting the old module. Since our unit is pre-programmed, no special tools are needed for setup.
Do I need to take my truck to the dealership after installation?
No. The primary benefit of our module is that it is pre-programmed to your vehicle’s VIN. This eliminates the need for any additional programming or setup at a dealership, saving you time and money.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause of a P0700, it’s always wise to use a scanner to check for other specific codes (like solenoid faults) that the P0700 is pointing to. In many cases, replacing a faulty TCM will clear this and related codes.
What happens if I don’t replace a failing TCM?
Ignoring a failing TCM can lead to more severe issues. Continued harsh shifting can cause premature mechanical wear on internal transmission components, leading to a much more expensive repair. It can also leave you stranded if the vehicle enters a permanent limp mode or fails to engage a gear.
Is a core charge required for this part?
No, there is no core charge for this part. You can keep your old module without any hassle or need to return it.