If your 2006-2007 Saturn ION is suffering from harsh shifting, getting stuck in gear, or has an illuminated check engine light, you’re likely dealing with a failed Transmission Control Module (TCM). As a seasoned technician, I’ve seen these exact issues countless times. A faulty TCM can make your daily drive frustrating and unpredictable. This T42 Transmission Control Module, part number 24235753, is the definitive solution, arriving expertly programmed to your vehicle’s VIN for a true plug-and-play repair.
This isn’t just a replacement part; it’s a complete fix that restores the precise communication between your engine and transmission. It manages shift points, torque converter lockup, and line pressure, eliminating the erratic behavior caused by a failing original unit. By installing our VIN-programmed module, you bypass the expensive and time-consuming trip to the dealership for programming, saving you time and money.
Case Study: A Tricky Diagnosis
A customer brought in a 2007 Saturn ION with a classic complaint: it would randomly refuse to shift out of 2nd gear, and the transmission warning light was on. They’d already been quoted over $2,000 for a transmission rebuild at another shop. After plugging in my scan tool, I saw a P0700 (Transmission Control System Malfunction) code. Instead of jumping to conclusions, I checked the TCM’s live data. Communication was intermittent. After swapping in one of our pre-programmed T42 modules—a 20-minute job—the codes cleared, and the car shifted perfectly. This 2006-2007 ION TCM saved the customer a massive repair bill and got their car back to being a reliable daily driver.
Is Your Saturn ION Showing These Transmission Problems?
- ✔ Harsh, erratic, or delayed gear shifts.
- ✔ Vehicle is stuck in “limp mode” (often 2nd or 3rd gear only).
- ✔ Check Engine Light or Transmission Warning Light is on.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults are present.
- ✔ Complete failure to upshift or downshift, leading to poor acceleration.
- ✔ A noticeable decrease in fuel economy.
- ✔ Intermittent loss of communication with the TCM.
DIY Installation Guide: Get Your ION Shifting Smoothly
Installing your new 2006-2007 ION TCM is a straightforward process that most DIYers can complete in under 30 minutes with basic hand tools. No need to pay for hours of shop labor.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: On the Saturn ION, the TCM is typically found in the engine bay, located behind the driver’s side (LH) strut tower.
- Remove the Old Unit: Carefully unplug the electrical connectors. Note the orientation of any locking tabs to avoid damage. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Securely reconnect the electrical harnesses, ensuring they click into place.
- Final Steps: Reconnect the battery terminal. Start the vehicle and allow it to idle for a few minutes. If you have a basic scan tool, use it to clear any stored fault codes from the ECU. Test drive the vehicle to confirm smooth shifting.
Verified Fitment For These GM Vehicles
While this is the direct-fit solution for the 2006-2007 Saturn ION, this T42 module is also compatible with a wide range of other GM vehicles. Please verify your part number (24235753) or contact our support team to ensure perfect fitment.
- Saturn ION: 2006-2007 (Transmission; behind LH strut tower)
- Chevrolet Cobalt / HHR / Impala / Monte Carlo
- Pontiac G5 / G6 / Grand Prix
- Buick Allure / LaCrosse / Lucerne
- GMC Sierra / Yukon / Savana
- Chevrolet Silverado / Tahoe / Express
- And many more models from 2006-2014. Refer to the full fitment list for details.
Take control of your vehicle’s performance and reliability. This pre-programmed 2006-2007 ION TCM is the most effective and efficient way to solve your transmission problems for good. Order yours today and experience the difference.
Frequently Asked Questions
Do I need to have this module programmed by a dealer?
No. This module comes fully pre-programmed to your vehicle’s specific VIN. It is ready for installation right out of the box, saving you the cost and hassle of a dealership visit.
Is this a difficult part to install myself?
Not at all. For the Saturn ION, it’s located in an accessible spot behind the LH strut tower. With basic hand tools, most people can swap the module in under 30 minutes.
What if I install it and still have shifting problems?
While this TCM is the most common cause of these symptoms, other issues like faulty solenoids or wiring can sometimes be present. Our expert support team is here to help you diagnose any further issues.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module without any extra fees or the need to ship it back.
What does the one-year warranty cover?
Our one-year warranty covers any defects in the module itself. If the unit fails within one year of purchase, we will provide a replacement.