Restore Smooth Shifting to Your Saturn ION
If your 2006-2007 Saturn ION is suffering from harsh shifting, getting stuck in gear, or has an illuminated check engine light, a failing Transmission Control Module (TCM) is the most likely culprit. As the electronic brain of your automatic transmission, the TCM is responsible for every gear change. When it fails, it can make your car unpredictable and unsafe to drive. This T42 Transmission Control Module is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair that gets you back on the road without a costly trip to the dealership.
Case Study: A Tricky Diagnosis
A customer brought in a 2007 Saturn ION with classic transmission complaints: delayed engagement into Drive and violent 1-2 shifts. The scanner showed a generic P0700 (Transmission Control System Malfunction) and a specific code for a shift solenoid. After spending time and money replacing the solenoid with no change, they came to my shop. In my experience, especially with these GM platforms, intermittent solenoid codes are often a red herring pointing to a failing TCM. The module’s internal drivers weaken over time, failing to properly command the solenoids. We installed a VIN-programmed TCM, cleared the codes, and the car shifted perfectly. This part saved the customer from a potential transmission rebuild.
Is Your Saturn Exhibiting These Telltale Signs?
A faulty TCM can manifest in several ways. If you’re noticing any of the following, it’s time to consider a replacement:
- ✔ Harsh, erratic, or delayed gear shifts.
- ✔ Vehicle is stuck in “limp mode” (usually 2nd or 3rd gear).
- ✔ Check Engine Light or Transmission Warning Light is on.
- ✔ Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0753, P0758, or other solenoid-related faults are present.
- ✔ A sudden drop in fuel economy.
- ✔ The transmission seems to slip out of gear.
The Benefits of a Pre-Programmed 2006-2007 ION TCM
This isn’t just a replacement part; it’s a comprehensive solution. By ordering our 2006-2007 ION TCM, you are bypassing the most frustrating part of the repair. We flash the module with the latest GM-certified software using your vehicle’s VIN, ensuring it works seamlessly with your car’s existing systems right out of the box. This process restores factory shift points, improves transmission efficiency, and ensures long-term reliability for your vehicle.
A Straightforward Guide to Your TCM Installation
For the 2006-2007 Saturn ION, the TCM is located behind the driver’s side (LH) strut tower in the engine bay. This makes for a relatively simple replacement that a confident DIYer can complete in under an hour.
- Safety First: Disconnect the negative terminal from your car’s battery to prevent any electrical shorts.
- Locate the Module: Find the TCM mounted behind the driver’s side strut tower. You may need to move the air filter housing for better access.
- Disconnect and Remove: Carefully unplug the electrical connectors. Note the locking tab positions. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount the new, pre-programmed module in the same location and securely fasten it. Reconnect the electrical harnesses until 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 OBD2 scanner to clear any stored fault codes from the vehicle’s memory.
Verified Vehicle Compatibility List
This T42 TCM, part number 24234274, is a direct-fit replacement for a wide range of General Motors vehicles. Please confirm your model and year below:
- Saturn ION: 2006-2007 (Transmission; behind LH strut tower)
- Chevrolet Cobalt: 2006-2010 (Transmission; LH strut tower)
- Chevrolet HHR: 2006-2011 (Transmission; LH engine compartment)
- Pontiac G5/G6/Pursuit: 2006-2010 (Transmission; LH strut tower)
- And many other GM models from 2006-2014. Please see the full fitment list for details.
Do I need to take my car to the dealer after installing this?
Do I need to take my car to the dealer after installing this?
No. The main benefit of this part is that we handle all the programming before it ships. It is pre-flashed to your vehicle’s VIN, making it a true plug-and-play installation. No further dealership programming or calibration is required.
What is a T42 TCM?
The T42 is the specific hardware platform name for this generation of General Motors Transmission Control Module. It was used across dozens of models with 4-speed automatic transmissions like the 4L60E and 4T45E found in the Saturn ION.
Is this part difficult to install on a Saturn ION?
No, on the Saturn ION, this is a very accessible repair for a DIY mechanic with basic tools. The module is located behind the driver’s side strut tower in the engine bay and can typically be swapped in under 30 minutes.
Do you need my old part back? Is there a core charge?
No, there is no core charge associated with this part. You can keep or dispose of your old module, saving you the time and hassle of a return shipment.