Is Your GM Vehicle Shifting Erratically?
Experiencing harsh gear changes, a check engine light that won’t go away, or the dreaded “limp mode” in your GM car, truck, or SUV? These are classic signs of a failing Transmission Control Module (TCM). A faulty TCM can make your vehicle unreliable and unsafe to drive, causing unpredictable behavior, poor fuel economy, and potentially leading to more severe transmission damage. Don’t let a small electronic component sideline your entire vehicle. Take control of your repair with a solution designed for reliability and ease.
Common Symptoms & Your Solution
If your vehicle is exhibiting any of the following symptoms, a failing TCM is the most likely culprit. This Programmed 24240449 T42 TCM is the definitive solution, engineered to resolve these issues and restore your transmission’s factory performance.
- Harsh, erratic, or delayed shifting
- Vehicle is stuck in one 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 are present
- Failure to upshift or downshift properly
- Noticeable decrease in fuel efficiency
- Complete loss of communication with the transmission
Features & Benefits
- ✔ Plug & Play Installation: This module arrives pre-programmed to your vehicle’s specific VIN. This critical step eliminates the need for expensive dealership programming, allowing you or your mechanic to install it directly out of the box.
- ✔ Restored Performance: By precisely managing shift points, torque converter lockup, and line pressure, this TCM brings back the smooth, predictable shifting you expect, improving both drivability and fuel economy.
- ✔ Lasting Reliability: Built to meet or exceed strict OEM quality standards, this module is designed to withstand the demanding conditions of daily driving and heavy-duty use, from a Silverado work truck to a Tahoe family hauler.
- ✔ Broad Compatibility: An exact replacement for a wide range of service numbers, including 24252114, 24234503, 24242391, and more, ensuring a perfect fit for dozens of GM models.
- ✔ One-Year Protection: This unit is backed by our one-year replacement warranty, giving you confidence and peace of mind in your repair.
Expert Insight: From the Technician’s Bench
We see failed T42 modules constantly. The biggest headache for both DIYers and professional shops has always been the programming. A module without programming is just a paperweight. You’d have to get the vehicle towed to a dealer, pay their diagnostic and programming fees, and lose the vehicle for a day or more. Our VIN programming service changes the game. By sending you a Programmed 24240449 T42 TCM that’s ready for immediate installation, we turn a multi-day, high-cost ordeal into a straightforward, sub-30-minute repair. It’s the smartest way to get back on the road quickly and affordably.
Frequently Asked Questions
What does VIN programming mean for me?
It means this module is a true plug-and-play solution. We load your vehicle’s specific identification number (VIN) and the latest GM software onto the module before we ship it. This ensures it communicates perfectly with your vehicle’s other computers (like the ECU) right out of the box, with no additional programming or dealer visits required.
Is this a difficult part to install?
For most models, the installation is very straightforward and can be completed in under 30 minutes with basic hand tools. The TCM is typically located in an accessible spot in the engine bay. Simply disconnect the battery, unplug the electrical connectors from the old module, unbolt it, and install the new one in its place. Reconnect everything, and you’re ready to go.
How do I know for sure that my TCM is the problem?
While the symptoms listed above are strong indicators, the best way to confirm is with a proper diagnostic scan. If your scan tool shows codes like P0700 (Transmission Control System Malfunction) or specific solenoid circuit codes, and you’re experiencing erratic shifting, the TCM is the most common point of failure.
Do I need to return my old TCM?
No, there is no core charge for this part. You can keep your old module, which saves you the time, cost, and hassle of shipping a part back.
Will this fix my specific transmission problem?
This Programmed 24240449 T42 TCM is designed to correct all issues directly caused by a faulty electronic control module, including false sensor readings, communication errors, and incorrect shift commands. It will not fix internal mechanical failures, such as a worn clutch pack or a broken gear. A proper diagnosis is always recommended.