Is your GM vehicle suffering from harsh, erratic shifting, getting stuck in gear, or displaying a check engine light with transmission codes? A failing Transmission Control Module (TCM) is a common cause for these frustrating and potentially damaging issues. This VIN-programmed GM T42 Transmission Control Module is the definitive, hassle-free solution to restore your vehicle’s performance and get you back on the road with confidence.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a faulty TCM is the likely culprit:
- Abrupt, harsh, or delayed gear shifts
- The vehicle is 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 faults
- Failure to upshift or downshift properly
- Poor fuel economy and transmission overheating
This module is engineered to be a direct-fit replacement, resolving these issues without requiring expensive dealership programming. By installing this pre-programmed GM T42 Transmission Control Module, you are providing the precise, reliable fix your transmission needs to operate smoothly and efficiently.
Key Features & Benefits
- ✔ Plug-and-Play Installation: Each module is expertly programmed to your vehicle’s specific VIN number. This critical step ensures complete compatibility and allows you to simply install the part without any need for a trip to the dealership for flashing or calibration.
- ✔ Restored Performance: By precisely managing shift points, torque converter lockup, and line pressure, this TCM brings back the smooth, predictable shifting you expect from your vehicle, improving both drivability and fuel efficiency.
- ✔ OEM-Standard Quality: Built to meet or exceed original equipment specifications, this module ensures reliable, long-term performance under all driving conditions, from daily commuting in an Impala to heavy-duty work in a Silverado.
- ✔ Broad Compatibility: This single unit is interchangeable with numerous GM part numbers, including 24252114, 24234503, and 24243901, making it the correct part for a wide range of cars, trucks, and SUVs.
- ✔ This unit is backed by our one-year replacement warranty.
Expert Insight: As a technician, I’ve seen countless drivers waste time and money replacing solenoids or even entire transmissions when the root cause was a faulty TCM. These T42 modules are notorious for developing internal electronic faults over time, leading to erratic behavior that can mimic mechanical failure. The single most effective repair is replacing the module with a correctly programmed unit. This part takes the guesswork out of the equation, providing a reliable fix that addresses the core electronic issue the first time.
Frequently Asked Questions
Why is VIN programming so important?
VIN programming loads your vehicle’s specific software and calibration files onto the module. Without it, the TCM cannot communicate correctly with the engine controller and other vehicle systems, leading to shifting problems, error codes, or a no-start condition. Our pre-programming makes this a true plug-and-play part.
Is this part difficult to install?
Installation is generally straightforward for someone with basic mechanical skills. The GM T42 Transmission Control Module is typically located in the engine bay and can be replaced in under 30 minutes. Always disconnect the battery before starting the repair. After installation, use a scan tool to clear any stored diagnostic codes.
Will this fix my specific transmission problem?
This module is the definitive solution for issues directly caused by a failing TCM, such as the symptoms listed above (erratic shifting, limp mode, specific DTCs). While it resolves the most common electronic transmission faults, it will not fix internal mechanical problems like a worn clutch or bad torque converter. Proper diagnosis is always recommended.
Do I need to send my old part back?
No. This part is sold without a core charge, so you can keep your old module without the hassle of returning it. This simplifies the process and gets your vehicle repaired faster.
How do I know if this fits my vehicle?
This module fits a wide range of 2006-2014 General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. Please refer to the detailed fitment list on this page or contact us with your VIN to confirm compatibility.