Restore Smooth, Reliable Shifting to Your Saturn Ion
If your 2006-2007 Saturn Ion is suffering from harsh shifts, getting stuck in gear, or throwing transmission codes, the culprit is often a failing Transmission Control Module (TCM). As the electronic brain of your automatic transmission, a faulty TCM can make driving frustrating and unpredictable. This T42 TCM, part number 24235340, is the definitive solution, arriving expertly programmed to your vehicle’s specific VIN. This eliminates the need for expensive dealership visits and gets you back on the road with confidence.
Case Study: The Elusive Saturn Ion Shifting Gremlin
I remember a 2007 Saturn Ion that came into my shop with a classic complaint: intermittent harsh 1-2 shifts and occasionally getting stuck in 3rd gear (limp mode), especially after it warmed up. The owner had already replaced a shift solenoid with no luck. The scanner showed a generic P0700 ‘Transmission Control System Malfunction’ code. After verifying the wiring harness and connector pins were clean and tight, experience pointed directly to the TCM. These T42 modules, especially after years of heat cycles behind the strut tower, can develop internal faults that cause these exact symptoms. We installed one of our VIN-programmed modules, and the car shifted like new on the first test drive. It’s a prime example of how a direct-fit, correctly programmed module saves hours of diagnostic headaches.
Is Your Saturn Ion Showing These Symptoms?
- ✔ Unpredictable, harsh, or delayed gear shifts.
- ✔ The vehicle is stuck in a single gear (limp mode) and won’t shift up or down.
- ✔ Check Engine Light or Transmission Warning Light is on with codes like P0700, P0750, or other solenoid-related DTCs.
- ✔ A noticeable drop in fuel economy due to inefficient shifting.
- ✔ Complete loss of communication with the transmission module.
- ✔ Slipping between gears or delayed engagement when shifting from Park to Drive.
A Straightforward Guide to Your 2006-2007 ION TCM Installation
- ✔ Safety First: Always disconnect the negative terminal on your vehicle’s battery before starting any electronic component replacement.
- ✔ Locate the Module: On the 2006-2007 Saturn Ion, the TCM is located in the engine bay, tucked behind the driver’s side (LH) strut tower.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors. Use a socket wrench to remove the mounting bolts holding the old module in place.
- ✔ Install the New Module: Mount your new, VIN-programmed TCM in the same location and securely fasten the bolts. Reconnect the electrical harnesses, ensuring they click into place.
- ✔ Final Steps: Reconnect the battery terminal. While our programming handles the critical setup, it’s good practice to use a basic scan tool to clear any stored fault codes from the vehicle’s memory.
Verified Vehicle Compatibility
This T42 Transmission Control Module is a direct-fit replacement for the 2006-2007 Saturn Ion. It is also compatible with a wide range of other General Motors vehicles. This module is interchangeable with part numbers including 24252114, 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, and others. Please verify your part number or contact us with your VIN to ensure perfect fitment.
Frequently Asked Questions
Does this module need to be programmed by a dealer?
No. We pre-program the module to your vehicle’s VIN before shipping. It arrives ready for plug-and-play installation, saving you a trip to the dealership and additional programming fees.
What information do you need to program it?
We only need your vehicle’s 17-digit Vehicle Identification Number (VIN) to load the correct GM software and calibrations for your specific car.
Will this fix a P0700 trouble code?
A P0700 is a general code indicating the TCM has detected a fault. In many cases where the TCM itself is the root cause of the problem, replacing it with our module will resolve the P0700 and any related specific codes (like for solenoids or sensors).
Is there a core charge for my old part?
No, there is no core charge. You can keep your old part, which simplifies the process and saves you the hassle and cost of return shipping.