Restore Your Vehicle’s Smooth, Reliable Shifting
Is your Chevrolet Express van, Silverado, or Tahoe suffering from harsh shifts, getting stuck in gear, or throwing transmission codes? A faulty Transmission Control Module (TCM) is often the culprit, disrupting communication between your engine and transmission and turning your dependable vehicle into a source of frustration. This OEM-quality T42 TCM is the definitive solution, arriving fully programmed to your vehicle’s specific VIN. This eliminates the need for expensive dealership visits and gets you back on the road with performance you can trust.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, this module is designed to be the direct-fit remedy:
- Abrupt, jerky, or delayed gear changes
- The vehicle enters “limp mode,” refusing to shift out of a single gear
- Illuminated Check Engine Light or Transmission Warning Light
- Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults
- Failure to upshift or downshift, leading to poor acceleration and fuel economy
Installing this pre-programmed T42 Transmission Control Module directly addresses the root electrical cause of these problems, restoring the precise, computer-controlled operation your transmission was designed for.
Features & Benefits
- ✔ Plug-and-Play Installation: This module is expertly programmed to your vehicle’s unique VIN before shipping. This means no additional, costly programming is required at a dealership. Simply install it, and you’re ready to go.
- ✔ Restored Drivability: By re-establishing proper communication, this TCM ensures smooth gear engagement, correct torque converter lockup, and optimal shift points, significantly improving your driving experience.
- ✔ Long-Term Reliability: Built to stringent OEM standards, this module is engineered to withstand the demanding conditions of daily driving or heavy-duty work, preventing recurring transmission issues.
- ✔ Broad Compatibility: A direct replacement for a wide range of GM part numbers, including 24252114, 24234503, and 24230461, ensuring a perfect fit for your specific truck, van, or SUV.
- ✔ Guaranteed Performance: This unit is backed by our one-year replacement warranty.
Expert Insight: From a Veteran Technician
I’ve seen countless work vans and trucks like the Express 1500 and Sierra come into the shop with what seems like a catastrophic transmission failure. The owner is stressed, thinking they need a full rebuild that will cost thousands and put their vehicle out of commission for a week. More often than not, the issue is purely electronic. Swapping in a quality, correctly programmed T42 Transmission Control Module is a sub-30-minute job that completely transforms the vehicle. The relief on the customer’s face when they realize the fix is this straightforward and effective is why we recommend this solution first. It saves time, money, and a massive headache.
Frequently Asked Questions
What does a VIN-programmed TCM actually do?
VIN programming loads your vehicle’s specific software and calibration files onto the module before it ships. This ensures it communicates perfectly with your vehicle’s engine computer (ECU) and other systems, matching the original factory settings for shift points, line pressure, and torque converter strategy. It makes the part a true plug-and-play component.
Is this part difficult to install myself?
For someone with basic mechanical skills, installation is straightforward. The TCM is typically located in the engine compartment (e.g., next to the battery, on a strut tower, or near the air cleaner box). The process involves disconnecting the battery, unplugging the electrical connectors from the old module, unbolting it, and installing the new one in reverse order. It usually takes less than 30 minutes.
Will this fix my specific error code, like P0700?
A P0700 code is a general fault code indicating the TCM has detected a problem. The actual issue is stored as a more specific code within the TCM itself. This module is designed to resolve the internal electronic failures that cause these codes. After installation, you should use a scan tool to clear any stored codes from the vehicle’s memory.
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 without any extra hassle or fees.
How can I be certain the TCM is the problem?
While the symptoms listed are strong indicators of a failing TCM, it’s always best to have a proper diagnosis performed. However, if you’re experiencing multiple electronic-related symptoms like erratic shifting combined with specific transmission codes, the TCM is the most likely cause. This part is the most common and effective solution for these issues.