Experiencing harsh shifting, a persistent check engine light, or your Saturn Aura stuck in limp mode? A failing Transmission Control Module (TCM) is often the culprit, turning your reliable daily drive into a source of stress. Get back on the road with confidence with this fully programmed, ready-to-install T42 Transmission Control Module. It’s the definitive solution to restore the smooth, predictable performance you expect from your vehicle, without the exorbitant costs and delays of a dealership visit.
Common Symptoms & Your Solution
If your vehicle is exhibiting any of the following signs, a faulty TCM is the likely cause. This module is engineered to resolve these exact issues:
- Harsh, erratic, or delayed gear shifts
- Vehicle stuck in a single gear (limp mode)
- Active Check Engine Light or Transmission Warning Light
- Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults
- Failure to upshift or downshift properly
- Noticeable decrease in fuel economy
- Intermittent loss of communication with the transmission
Installing our Programmed 24238856 T42 TCM is the most direct and reliable way to correct these problems, restoring communication between your engine and transmission for flawless operation.
Features & Benefits
- ✔ Plug-&-Play Installation: This module arrives pre-programmed to your vehicle’s specific VIN. This crucial step ensures perfect communication with your car’s systems right out of the box, eliminating the need for expensive dealership programming.
- ✔ Restored Performance: Regain the smooth shifting, responsive acceleration, and optimal fuel efficiency your vehicle had from the factory. Our programming uses the latest GM software updates for peak performance.
- ✔ Lasting Reliability: Built to strict OEM standards, this module is designed to withstand the demanding conditions of daily driving. It provides a dependable, long-term fix for common transmission computer failures.
- ✔ Guaranteed Confidence: This unit is backed by our one-year replacement warranty. Drive with the assurance that your investment is protected.
- ✔ Broad Compatibility: This T42 TCM is a direct replacement for a wide range of GM vehicles, including popular trucks, SUVs, and sedans. It is interchangeable with numerous part numbers like 24252114, 24234503, and 24239224.
Expert Insight: Why VIN Programming is Non-Negotiable
In my 20+ years of diagnostics, I’ve seen countless drivers try to save a few dollars with a generic, non-programmed module. It almost never ends well. Modern transmissions are complex systems that rely on precise data from your vehicle’s VIN—think gear ratios, tire size, and specific engine parameters. A generic module is flying blind. It can lead to persistent shifting problems, incorrect performance, and even potential damage to your transmission’s mechanical components. Our Programmed 24238856 T42 TCM eliminates that risk entirely. We do the critical programming for you, so you’re installing a part that’s truly tailored to your car, saving you from future headaches and costly repairs.
Frequently Asked Questions
What does a Transmission Control Module do?
The TCM acts as the brain for your automatic transmission. It uses data from various sensors to control gear shifts, torque converter lockup, and line pressure, ensuring smooth, efficient, and safe operation.
Is this a plug-and-play part?
Yes. Because we pre-program the module to your vehicle’s specific VIN, it is ready for immediate installation without any additional programming or trips to the dealership. Simply install the part, disconnect the battery for a few minutes to clear any adaptive memory, and you’re ready to drive.
How do I know if my TCM is the problem?
Common signs include erratic or harsh shifting, getting stuck in one gear (limp mode), and specific transmission-related trouble codes like P0700. While these symptoms strongly point to a failing TCM, it’s always best to have a professional diagnosis to rule out other potential issues.
Do I need to return my old TCM?
No, there is no core charge for this part. You can keep or dispose of your old module at your convenience, making the replacement process simpler and hassle-free.
Where is the TCM located on my 2007-2009 Saturn Aura?
On the Saturn Aura, the T42 TCM is typically located on the front of the left-hand frame rail in the engine compartment. Location can vary on other GM models, so always consult a service manual for your specific vehicle if you are unsure.