Restore Smooth Shifting to Your Saturn ION with a Plug-and-Play TCM
If your 2006-2007 Saturn ION is suffering from erratic shifting, getting stuck in gear, or throwing transmission codes, the culprit is often a failed Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen how a faulty TCM can make a perfectly good car feel unreliable and unsafe. This T42 Transmission Control Module is the definitive, hassle-free solution. It arrives pre-programmed to your vehicle’s specific VIN, eliminating the need for expensive dealership programming and allowing you to get your car back on the road quickly and confidently.
A Technician’s Notebook
I remember a 2007 Saturn ION that came into the shop stuck in ‘limp mode’—it wouldn’t shift past 2nd gear. The owner was frustrated, thinking they were facing a massive transmission rebuild bill. After a quick scan, we saw a classic P0700 code and several solenoid communication errors. Instead of a costly internal repair, we identified the failing TCM. We installed a VIN-programmed module just like this one. The whole job took less than 25 minutes, and the car was shifting perfectly on the test drive. The customer was thrilled to avoid a multi-thousand dollar repair with such a straightforward fix.
Is Your Saturn ION Showing These Transmission Warning Signs?
- ✔ Harsh, delayed, or unpredictable gear shifts that make driving uncomfortable.
- ✔ The vehicle is stuck in a single gear (limp mode), severely limiting speed.
- ✔ Check Engine Light or Transmission Warning Light is illuminated on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as the general P0700 or specific solenoid codes like P0750, P0753, P0758.
- ✔ A noticeable decrease in fuel economy as the transmission operates inefficiently.
- ✔ Complete loss of communication with the module, leading to a no-shift condition.
The Smart Solution: A Pre-Programmed 2006-2007 Saturn ION TCM
The brain of your automatic transmission is the TCM. It controls every shift point, manages torque converter lockup for efficiency, and monitors sensor data to ensure everything is working correctly. When it fails, the symptoms can be alarming. Our T42 TCM, which directly replaces part number 24235732, is the reliable answer. We handle the complex part—programming the module with the latest GM software matched to your VIN—so you don’t have to. This ensures perfect communication between the engine and transmission from the moment you install it, restoring the smooth, predictable performance you expect from your car.
DIY Installation: Get Your ION Shifting Smoothly in Under 30 Minutes
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and help reset the system.
- ✔ Locate the Module: On the 2006-2007 Saturn ION, the TCM is typically found in the engine bay, located behind the driver’s side (LH) strut tower.
- ✔ Disconnect and Remove: Carefully unplug the wiring harness connectors from the old TCM. Then, unbolt the module from its mounting bracket.
- ✔ Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the wiring harnesses. Ensure they click into place.
- ✔ Final Steps: Reconnect the battery terminal. Start the vehicle and let it idle for a few minutes. If you have a basic OBD2 scanner, it’s good practice to clear any stored fault codes. Take the car for a test drive to confirm the shifting issues are resolved.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of General Motors vehicles. While this page is dedicated to the 2006-2007 Saturn ION TCM, it also fits the following models. Please verify your specific model and part number before ordering.
ION 06-07 Transmission; (behind LH strut tower)
G6 06-10 Transmission; (LH strut tower)
COBALT 06-10 Transmission; (LH strut tower)
HHR 06-11 Transmission; (LH engine compartment)
MALIBU 06-10 Transmission; (LH frame rail)
… and many more GM models.
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean for me?
It means this module is ready for installation right out of the box. We use your Vehicle Identification Number (VIN) to load the correct GM factory software onto the module before we ship it. This saves you a trip to the dealership and avoids the $150+ programming fee they typically charge, making it a true plug-and-play repair.
Do I need to send my old TCM back for a core charge?
No. We do not require a core return. You can keep your old part, which simplifies the process and saves you the hassle and cost of return shipping.
Will this part fix a P0700 transmission code?
In many cases, yes. The P0700 code is a general fault code indicating the TCM has detected a problem. If the TCM itself is the source of the failure (which is very common), replacing it with this pre-programmed unit will resolve the code and the underlying issue.
How difficult is the installation? Can I do it myself?
For most DIYers with basic tools, this is a very straightforward job. The module is accessible in the engine bay, and the process involves disconnecting the battery, unplugging a few connectors, and removing a few bolts. Our installation guide above walks you through the simple steps.
What kind of warranty is included?
This module is backed by a one-year warranty, giving you peace of mind that you’re installing a quality, dependable part built to meet or exceed OEM standards.