Restore Your Truck’s Shifting Performance
Is your GMC Sierra or Chevrolet Silverado suffering from harsh shifting, delayed gear engagement, or getting stuck in limp mode? A failing Transmission Control Module (TCM) is often the culprit, disrupting communication between your engine and transmission and leaving you with an unreliable vehicle. This genuine GM T42 Transmission Control Module is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play installation. Get your truck back on the road and shifting like new without a costly trip to the dealership.
Common Symptoms & Your Solution
A faulty TCM can cause a host of frustrating and potentially damaging issues. If you’re experiencing any of the following, this module is designed to be the direct fix:
- Abrupt, jerky, or erratic gear changes
- The vehicle is stuck in a single gear (limp mode)
- Check Engine Light or Transmission Warning Light is on
- Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults
- Failure to upshift or downshift properly
- A significant drop in fuel economy
- Delayed engagement when shifting from Park to Drive or Reverse
This expertly programmed 2007-2013 Sierra 1500 T42 Transmission Control Module restores the critical logic your transmission needs to operate efficiently, resolving these symptoms and preventing further wear on internal components.
Features & Benefits
- ✔ Plug & Play Installation: This module is professionally programmed to your vehicle’s VIN before shipping. This eliminates the need for expensive scan tools or dealership programming, saving you time and money.
- ✔ Restored Drivability: By re-establishing precise control over shift points and torque converter lockup, this TCM ensures smooth acceleration, predictable shifting, and improved fuel efficiency.
- ✔ OEM-Grade Quality: Built to meet or exceed strict General Motors standards for performance and durability, ensuring a reliable, long-lasting repair for your work truck or daily driver.
- ✔ Broad Compatibility: A direct replacement for a wide range of service numbers including 24252114, 24234503, 24230461, and more, making it the right fit for numerous GM trucks, vans, and SUVs.
- ✔ Guaranteed Performance: This unit is backed by our one-year replacement warranty.
Expert Insight: The Critical Role of VIN Programming
As a tech with over 20 years on the shop floor, I’ve seen countless transmission issues caused by mismatched electronics. A generic, non-programmed module is a gamble. It might not have the correct software updates for your specific vehicle build, leading to persistent shifting problems or even new error codes. Our VIN-specific programming ensures the TCM has the exact factory calibration your truck left the assembly line with, plus any subsequent GM software improvements. This is the key to a one-time, successful repair that restores factory performance and reliability.
Frequently Asked Questions
What does a T42 TCM actually do?
The T42 Transmission Control Module acts as the brain for your automatic transmission. It receives data from various sensors on the engine and vehicle, and uses that information to control hydraulic pressure, shift timing, and torque converter lockup for optimal performance and efficiency.
Is this part difficult to install?
For most DIYers with basic tools, the installation is straightforward. The module is typically located in the engine bay (e.g., next to the battery or on a strut tower). The process involves disconnecting the battery, unplugging the electrical connectors, unbolting the old module, and installing the new one. Since our 2007-2013 Sierra 1500 T42 Transmission Control Module is pre-programmed, no further steps are needed.
Will this module fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem and has requested the Check Engine Light be turned on. While this module often resolves the root cause of a P0700, it’s essential to have the transmission scanned for more specific codes (like solenoid or sensor faults) to confirm the TCM is the primary point of failure.
Do I need to send my old part back?
No, there is no core charge for this part. You can keep your old module, which simplifies the process and saves you the hassle and cost of return shipping.
What happens if I don’t replace a bad TCM?
Continuing to drive with a faulty TCM can lead to more severe and expensive problems. Poor shifting can cause premature wear on clutches and bands inside the transmission, and being stuck in limp mode can be a significant safety hazard. Addressing the issue promptly with a quality part like this is the best course of action.