Restore Peak Performance to Your Saturn ION’s Transmission
If your 2006 or 2007 Saturn ION is suffering from erratic shifting, delayed gear engagement, or is stuck in limp mode, a failing Transmission Control Module (TCM) is the most likely culprit. As the central computer for your automatic transmission, the TCM orchestrates every shift, manages torque converter lockup, and monitors system health. When it fails, it can cause a cascade of problems that affect drivability, fuel economy, and safety. This OEM-quality T42 TCM is the definitive, hassle-free solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play installation.
From the Diagnostic Bay
We recently had a 2007 Saturn ION towed to the shop, stuck in 3rd gear with the check engine light glaring. The owner was frustrated, having already spent money replacing a shift solenoid based on a generic code reader’s output. Our professional scan tool pulled a P0700, indicating a request from the TCM to turn on the light. We diagnosed a faulty processor within the original module. Instead of a multi-day wait and high cost from the dealership, we installed this exact VIN-programmed T42 TCM. In less than an hour, the ION was shifting smoothly through all gears, all codes were cleared, and the customer drove away with a reliable car and significant savings.
Symptoms of a Failing Saturn ION TCM
- ✔️ Harsh, slamming, or erratic gear shifts.
- ✔️ Vehicle stuck in a single gear (limp mode).
- ✔️ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔️ Illuminated 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 correctly.
- ✔️ Decreased fuel efficiency and potential transmission overheating.
- ✔️ Complete loss of communication with the module.
The Power of VIN Programming
What sets this module apart is our expert VIN programming service. Before shipping, we load your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM software onto the module. This critical step ensures that the TCM communicates flawlessly with your ION’s engine computer (ECU) and other onboard systems right out of the box. You can bypass the expensive and time-consuming programming fees at a dealership. This is not a generic, one-size-fits-all part; it’s a component tailored specifically for your vehicle’s powertrain configuration, guaranteeing optimal shift points, fuel strategy, and performance.
Simple Installation for DIYers and Professionals
Replacing the Saturn ION TCM is a straightforward job. On the 2006-2007 ION, the module is typically located behind the driver’s side strut tower in the engine compartment. The process involves disconnecting the battery, unplugging the electrical connectors from the old module, unbolting it, and installing the new one in its place. Once the new module is connected and the battery is reconnected, the vehicle is ready to go. We recommend using a basic scan tool to clear any stored fault codes after installation to ensure a clean slate for the new module.
This T42 TCM is also a direct replacement for a wide range of other GM vehicles and interchanges with numerous part numbers, including 24252114, 24234503, 24230461, and more, ensuring broad compatibility and proven reliability across the GM platform. Built to meet or exceed original equipment standards and backed by a one-year warranty, this module provides a dependable, long-term fix for your transmission woes.
Frequently Asked Questions
Will I need to program this module after I receive it?
No. This module comes fully programmed to your vehicle’s VIN. It is a plug-and-play solution that does not require any additional programming or trips to the dealership. Simply install it, clear any old codes, and drive.
Where is the TCM located on my 2006-2007 Saturn ION?
On the Saturn ION, the Transmission Control Module is typically found in the engine bay, located behind the driver’s side (LH) strut tower. Always disconnect the vehicle’s battery before starting the replacement process.
Is this a new or used part?
This is a high-quality, OEM-standard replacement part that has been expertly prepared and programmed for your vehicle. It is guaranteed to restore function and is backed by our comprehensive warranty.
What happens if I continue driving with a bad TCM?
Continuing to drive with a faulty TCM can lead to more severe transmission damage. Poor shifting can cause excessive wear on clutches and bands, and being stuck in the wrong gear can strain the engine and transmission, potentially leading to a complete failure requiring a costly rebuild or replacement.
Does this part have a core charge?
No, there is no core charge for this part. You can keep your old module without the hassle of returning it, saving you time and money.