Is your GM truck or van suffering from shifting problems, leaving you stuck and costing you valuable time? A faulty Transmission Control Module (TCM) is often the culprit behind issues like harsh shifting, delayed gear engagement, and being stuck in limp mode. This is more than an annoyance—it’s a critical failure that can sideline your work vehicle or family SUV. Put an end to the guesswork and expensive dealership visits with our direct-fit, VIN-programmed 24239926 T42 TCM.
Common Symptoms & Your Solution
If you’re experiencing any of the following, this module is the definitive solution you need to restore your transmission’s performance. A failing T42 TCM will typically trigger the check engine light and store diagnostic trouble codes (DTCs) like P0700, P0750, or other solenoid-related faults. Key symptoms include:
- Harsh, erratic, or delayed shifting
- Vehicle stuck in a single gear (limp mode)
- Failure to upshift or downshift
- Poor fuel economy and transmission overheating
- Complete loss of communication with the transmission
This expertly prepared programmed 24239926 T42 TCM is engineered to resolve these issues permanently. By programming the unit to your vehicle’s specific VIN before shipping, we eliminate the need for costly and time-consuming dealership programming. It arrives ready for a true plug-and-play installation, getting you back on the road fast.
Features & Benefits
- ✔ VIN-Programmed for Your Vehicle: Arrives ready for installation with the latest GM software updates for your specific vehicle. This ensures perfect communication between components and optimal transmission performance right out of the box.
- ✔ Restores Smooth, Decisive Shifting: By precisely controlling shift points, torque converter lockup, and line pressure, this module brings back the smooth, reliable operation you expect from your automatic transmission.
- ✔ Eliminates Diagnostic Headaches: Designed to clear persistent transmission-related trouble codes and warning lights, giving you confidence that the root problem has been solved.
- ✔ OEM-Standard Quality & Durability: Built to meet or exceed original equipment specifications, ensuring long-lasting reliability whether you’re hauling heavy loads in a Savana van or commuting in a Tahoe.
- ✔ No Core Charge Required: Keep your old part without the hassle or expense of returning a core, simplifying your repair process.
- ✔ Guaranteed Performance: This unit is backed by our one-year replacement warranty.
From the Technician’s Bench: We see these T42 modules frequently. The number one reason for a failed replacement is improper or non-existent programming. A generic module from a parts store simply won’t work correctly—it has to be calibrated to your vehicle’s specific operating parameters. Our VIN programming service isn’t just a convenience; it’s the critical step that ensures the repair is done right the first time. This programmed 24239926 T42 TCM saves you from the frustration of a failed install and the extra trip to a mechanic with expensive scan tools.
This module is the ideal fix for a massive range of popular 2006-2014 General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, 4L70E, and 4L80E. Whether you’re maintaining a fleet of Express vans or fixing the family Yukon, this part delivers dependable, lasting results. Installation is straightforward for any competent DIYer or professional technician, typically taking less than 30 minutes. Restore the reliability of your vehicle today.
Frequently Asked Questions
What does a VIN-programmed TCM actually do?
VIN programming loads your vehicle’s specific factory software and settings onto the module. This ensures it communicates perfectly with the engine computer and other systems, controlling shift strategies, torque converter function, and pressure settings exactly as the manufacturer intended. It makes the installation plug-and-play, with no extra steps needed.
Is this a difficult part to install?
For most models, the installation is very simple. The TCM is typically located in an accessible spot in the engine bay. The process involves disconnecting the battery, unplugging the electrical connectors from the old module, swapping it with the new one, and reconnecting everything. Most DIY mechanics can complete the job in under 30 minutes with basic hand tools.
Will this fix a P0700 trouble code?
A P0700 code is a general transmission fault request, meaning the TCM has detected a problem and asked the main engine computer to turn on the check engine light. While this module will fix the underlying cause of many such codes (like faulty solenoids or internal logic failure), you should always diagnose any other specific codes that accompany the P0700 to ensure a complete repair.
Do I need to send my old part back?
No. We do not require a core return for this part. You can keep, recycle, or dispose of your old module at your convenience, which simplifies the process and saves you return shipping costs.
How do I know this is the right part for my vehicle?
Please check the extensive compatibility list on this page. This programmed 24239926 T42 TCM replaces numerous original part numbers. The best way to confirm is to match your vehicle’s year, make, and model to the list provided or cross-reference your existing part number.