Is Your GM Vehicle Shifting Erratically or Stuck in Limp Mode?
Dealing with harsh, unpredictable gear shifts, a check engine light that won’t go away, or a transmission that refuses to shift properly can be incredibly frustrating. These are classic signs that your Transmission Control Module (TCM) has failed. For owners of hard-working vans like the GMC Savana or family haulers like the Chevy Tahoe, a reliable transmission isn’t a luxury—it’s a necessity. This pre-programmed T42 TCM 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
A failing TCM can cause a cascade of problems that affect your vehicle’s safety and driveability. If you’re experiencing any of the following, this module is the solution you need:
- Harsh, delayed, or erratic shifting
- Vehicle 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 codes
- Failure to upshift or downshift
- Poor fuel economy and transmission overheating
Installing our Programmed 24235340 Transmission Control Module directly addresses the electronic source of these issues, providing a permanent fix without the need for expensive dealership programming.
Features & Benefits
- ✔ Plug & Play Installation: This module arrives pre-programmed to your vehicle’s specific VIN. This crucial step ensures perfect communication between the TCM and your vehicle’s other systems, eliminating the need for a trip to the dealer for costly flashing or setup.
- ✔ Restored Performance: By precisely managing shift points, torque converter lockup, and line pressure, this TCM restores the smooth, responsive shifting you expect from your vehicle.
- ✔ Solve Annoying DTCs: Expertly programmed to the latest GM software updates, this module is designed to resolve common transmission-related fault codes right out of the box.
- ✔ Built to OEM Standards: Engineered for durability and reliability, this module meets or exceeds original equipment specifications, ensuring long-lasting performance under all driving conditions. The Programmed 24235340 Transmission Control Module is a dependable component for your repair.
- ✔ One-Year Warranty: This unit is backed by our one-year replacement warranty, giving you confidence in your repair.
Expert Insight: Why VIN Programming is Non-Negotiable
From a diagnostician’s perspective, installing a non-programmed TCM is like putting the wrong key in a lock. While it might fit, it won’t work correctly. Your vehicle’s transmission behavior is fine-tuned based on its specific engine, axle ratio, and even tire size. Our VIN programming process writes this exact data to the module before it ships. This ensures the TCM makes the right decisions every millisecond, preventing the shift timing errors and performance issues that plague generic, ‘one-size-fits-all’ modules. This is the secret to a successful, one-time repair.
This Programmed 24235340 Transmission Control Module is the smart choice for mechanics and DIYers alike who demand a reliable, efficient, and cost-effective solution to complex transmission problems.
Frequently Asked Questions
What does a T42 Transmission Control Module do?
The TCM acts as the ‘brain’ for your automatic transmission. It receives data from various sensors on the vehicle and uses it to control shift solenoids, regulate hydraulic pressure, and manage torque converter lockup to ensure smooth and efficient gear changes.
Is this part difficult to install?
Installation is typically straightforward for someone with basic mechanical skills. The module is located in the engine compartment and can usually be replaced in under 30 minutes. We recommend disconnecting the battery before starting the repair.
Why is VIN programming so important for this part?
VIN programming loads your vehicle’s specific configuration and software onto the module. Without it, the TCM cannot communicate correctly with the engine and other systems, leading to persistent shifting problems, fault codes, and even transmission damage. Our pre-programming saves you a mandatory and expensive trip to the dealership.
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 essential to diagnose any other specific codes that are present (e.g., solenoid codes) to confirm the TCM is the faulty component.
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 hassle, simplifying the repair process.
How do I confirm this fits my exact vehicle?
Please use the detailed fitment list on this page or enter your vehicle’s information into our fitment tool. You can also match the service number on your original module to the interchange numbers listed in our description to ensure compatibility.