Is Your GM Vehicle Shifting Erratically or Stuck in Limp Mode?
Dealing with harsh, unpredictable 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 of a failing Transmission Control Module (TCM), a critical component that acts as the brain for your automatic transmission. When it fails, it can make your dependable truck, SUV, or sedan feel unreliable and unsafe. This VIN-programmed 24239926 T42 Transmission Control Module is the definitive solution to restore the smooth, precise performance your vehicle had when it was new.
Common Symptoms & Your Solution
A faulty T42 TCM can manifest in several ways, often triggering diagnostic trouble codes (DTCs) like P0700, P0750, or other solenoid-related faults. If you’re experiencing any of the following, this module is the solution you need:
- Harsh or delayed gear engagement
- Slipping between gears or erratic shifting patterns
- Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear)
- Failure to upshift or downshift
- Illuminated Check Engine or Transmission warning lights
- Poor fuel economy and potential transmission overheating
By replacing your old unit with our expertly programmed 24239926 T42 Transmission Control Module, you directly address the electronic source of these problems, eliminating the guesswork and preventing further damage to your transmission’s mechanical components.
Features & Tangible Benefits
- ✔ Plug-and-Play Installation: This module arrives pre-programmed to your vehicle’s specific VIN. This means no expensive trips to the dealership for programming—simply install it, and you’re ready to go.
- ✔ Restored Performance: By using the latest GM software updates during programming, this TCM ensures optimal shift points, torque converter lockup, and communication with the engine, restoring smooth operation and fuel efficiency.
- ✔ Lasting Reliability: Built to meet or exceed strict OEM quality standards, this module is designed for durability, ensuring it can handle the demands of daily driving, heavy hauling, or long commutes.
- ✔ Hassle-Free Process: No core charge is required. You can keep your old part without the inconvenience of packaging and returning it, simplifying your repair process.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty. Drive with confidence knowing your purchase is protected.
Expert Insight: Why VIN Programming is Non-Negotiable
Many sellers offer non-programmed or ‘one-size-fits-all’ modules, but for modern GM vehicles, this is a recipe for disaster. Your vehicle’s computers—the Engine Control Module (ECM), Body Control Module (BCM), and TCM—are in constant communication. A non-programmed TCM is like a stranger trying to join a private conversation; it doesn’t have the right security credentials or ‘handshake’ to work correctly. Our VIN-specific programming ensures this 24239926 T42 Transmission Control Module is recognized by your vehicle instantly, with the correct shift strategies and software for your exact model, engine, and tire size. This prevents a host of issues, from persistent error codes to incorrect shifting that can cause long-term transmission wear.
Frequently Asked Questions
Is this TCM really plug-and-play?
Absolutely. We pre-program the module using the VIN you provide during checkout. This ensures it has the exact software and calibration for your specific vehicle, allowing for a direct installation without any need for additional dealer programming.
Will this fix my P0700 transmission code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While a failing TCM is a very common cause for this and related codes, we always recommend confirming the diagnosis. This part is designed to resolve issues originating from a faulty module.
Do I need special tools for installation?
Installation typically requires only basic hand tools (like a socket set) and takes under 30 minutes for most models. The TCM is usually located in an accessible part of the engine bay. We recommend disconnecting the battery before starting and using a basic scan tool to clear any stored codes after installation is complete.
Where is the TCM located on my vehicle?
The location varies by model. Common locations include the LH or RH side of the engine compartment, next to the battery, under the air cleaner box, or on the LH strut tower. Your vehicle’s service manual can provide the exact location.
Is there a core charge or do I need to return my old part?
No, there is no core charge. You can keep or dispose of your old module, making the repair process simpler and more convenient for you.