Restore Flawless Shifting to Your Saturn Ion
Is your 2006-2007 Saturn Ion experiencing frustrating and unpredictable transmission behavior? If you’re dealing with harsh shifts, delayed gear engagement, or a check engine light that points to transmission faults, a failing Transmission Control Module (TCM) is the most likely culprit. This vital component is the electronic brain of your automatic transmission. When it fails, it can disrupt your vehicle’s performance and reliability. This OEM-quality T42 TCM, service number 24230461, is the definitive solution, pre-programmed to your vehicle’s VIN for a simple, plug-and-play installation.
From the Diagnostic Bay
We recently had a 2007 Pontiac G6 come into the shop with classic symptoms of a failing transmission—erratic shifting and a P0752 code for Shift Solenoid ‘A’ Stuck On. The owner had already spent a few hundred dollars replacing the solenoid pack himself, but the problem persisted. After a quick diagnostic scan and checking the wiring, we identified the root cause: the T42 TCM was sending faulty signals. Instead of throwing more parts at it, we installed one of our VIN-programmed modules. The car immediately shifted like new, and the codes were gone for good. It’s a common scenario where diagnosing the ‘brain’ first saves time, money, and a lot of headaches.
Identifying a Faulty Saturn ION TCM
A failing TCM can manifest in various ways, often mimicking mechanical transmission failure. Before considering a costly transmission rebuild, check for these common electronic symptoms. Replacing the module can often resolve these issues completely and restore your vehicle’s drivability.
- ✔ Erratic Shifting: Experiencing sudden harsh downshifts, delayed upshifts, or a feeling of the transmission slipping between gears.
- ✔ Limp Mode Activation: Your vehicle may get stuck in a single gear (usually 2nd or 3rd) to prevent further damage, severely limiting speed and performance.
- ✔ Warning Lights: The Check Engine Light or a dedicated transmission warning light will illuminate on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): Common codes associated with a bad TCM include P0700 (Transmission Control System Malfunction) and various solenoid-specific codes (e.g., P0750, P0751, P0753).
- ✔ Poor Fuel Economy: Inefficient shifting and torque converter lock-up issues caused by a faulty module can lead to a noticeable decrease in MPG.
- ✔ No Communication: In severe cases, a scan tool may be unable to communicate with the TCM, indicating a complete module failure.
The Plug-and-Play Advantage: VIN Programming Included
This isn’t just a replacement part; it’s a complete solution. Every module we ship is expertly programmed with the latest GM software updates specific to your vehicle’s VIN. This critical step ensures seamless communication between the TCM, the engine computer, and other vehicle systems. You get optimal shift points, correct torque converter operation, and proper diagnostic functions right out of the box. This eliminates the need for expensive and time-consuming trips to the dealership for programming, making it a straightforward DIY-friendly repair.
Effortless Installation
Installation is simple and can typically be completed in under 30 minutes with basic hand tools. On the 2006-2007 Saturn Ion, the TCM is located behind the driver-side strut tower in the engine compartment. Simply disconnect the battery, unplug the electrical connectors from the old module, unbolt it, and install 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 clearing any stored DTCs with a basic scan tool after installation.
Broad GM Compatibility
While this is a perfect fit for the Saturn ION, this T42 TCM is also compatible with a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. It directly interchanges with numerous part numbers, including 24252114, 24234503, 24230461, and more. Please see the comprehensive fitment list below to confirm compatibility with your specific model.
This part will fit these makes and models with these options:
ALLURE 06-09 Transmission; (lower air cleaner housing)
AVALANCHE 1500 07-08 Transmission; (next to battery)
AURA 07-09 Transmission; (LH frame rail front)
CANYON 08-12 Transmission; (RH rear engine compartment)
COBALT 06-10 Transmission; (LH strut tower)
COLORADO 08-12 Transmission; (RH rear engine compartment)
DTS 06-11 Transmission; (RH front engine compartment)
ENVOY 06-07 Transmission; (LH engine compartment), (8 cylinder)
ENVOY 08-09 Transmission; (LH engine compartment)
ENVOY XL 06 Transmission; (LH engine compartment), (8 cylinder)
EXPRESS 1500 VAN 06-14 Transmission; (RH engine compartment)
EXPRESS 2500 VAN 06-14 Transmission; (RH engine compartment)
EXPRESS 3500 VAN 06-14 Transmission; (RH engine compartment)
G5 07-10 Transmission; (LH strut tower)
G6 06-10 Transmission; (LH strut tower)
GRAND PRIX 06-08 Transmission; (lower air cleaner housing)
HHR 06-11 Transmission; (LH engine compartment)
HUMMER H3 08-10 Transmission; (RH rear engine compartment)
IMPALA 06-11 Transmission; (lower air cleaner housing)
ION 06-07 Transmission; (behind LH strut tower)
LACROSSE 06-09 Transmission; (lower air cleaner housing)
LUCERNE 06-07 Transmission; (4.6L), (LH engine compartment)
LUCERNE 08-11 Transmission; (LH engine compartment)
MALIBU 06-10 Transmission; (LH frame rail)
MONTE CARLO 06-07 Transmission; (lower air cleaner housing)
MONTANA 06-09 Transmission; (LH strut tower)
PURSUIT 06 Transmission; (LH strut tower)
RAINIER 06-07 Transmission
RENDEZVOUS 06-07 Transmission; (air cleaner box)
SAAB 9-7X 06-09 Transmission; (LH engine compartment)
SAVANA 1500 VAN 06-14 Transmission; (RH engine compartment)
SAVANA 2500 VAN 06-14 Transmission; (RH engine compartment)
SAVANA 3500 VAN 06-14 Transmission; (RH engine compartment)
SIERRA 1500 PICKUP 07 Transmission; (new style, smooth door skin), (next to battery)
SIERRA 1500 PICKUP 08 Transmission; (next to battery)
SIERRA 1500 PICKUP 09-13 Transmission; (next to battery), w/o hybrid option
SIERRA 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (next to battery)
SILVERADO 1500 PICKUP 07 Transmission; (new style, smooth door skin), (next to battery)
SILVERADO 1500 PICKUP 08 Transmission; (next to battery)
SILVERADO 1500 PICKUP 09-13 Transmission; (next to battery), w/o hybrid option
SILVERADO 2500 PICKUP 07 Transmission; new style (smooth door skin), 6.0L, (next to battery)
SSR 05-06 Transmission; (front LH frame)
SUBURBAN 1500 07-08 Transmission; (next to battery)
TAHOE 07 Transmission; (next to battery)
TAHOE 08-09 Transmission; (next to battery), w/o auxiliary oil cooler pump
TERRAZA 06-07 Transmission; (LH strut tower)
TRAILBLAZER 06-07 Transmission; (LH engine compartment), (8 cylinder)
TRAILBLAZER 08-09 Transmission; (LH engine compartment)
TRAILBLAZER EXT 06 Transmission; (LH engine compartment), (8 cylinder)
UPLANDER 06-09 Transmission; (LH strut tower)
VUE 07-08 Transmission; 2.4L, (LH front engine compartment)
VUE 09 Transmission; 2.4L, w/hybrid, LH side front engine compartment, (shift control)
VUE 09 Transmission; 2.4L, w/o hybrid; (LH front engine compartment)
VUE 10 Transmission
YUKON 07 Transmission; (next to battery)
YUKON 08 Transmission; (next to battery), w/o auxiliary oil cooler control
YUKON 09 Transmission; (next to battery), w/o auxiliary oil cooler pump
YUKON XL 1500 07-08 Transmission; (next to battery)
Frequently Asked Questions
Do I need to have this module programmed by a dealer?
No. This module comes pre-programmed to your vehicle’s specific VIN. It is ready for installation right out of the box, with no additional programming or flashing required.
Where is the TCM located on my 2007 Saturn Ion?
On the 2006-2007 Saturn Ion, the Transmission Control Module is located in the engine bay, situated behind the driver’s side (LH) strut tower.
Will this part fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause that triggers a P0700, it’s essential to scan for other, more specific codes (like those for solenoids or sensors) to confirm the diagnosis.
Is this a new or used part?
This is a high-quality, OEM-standard replacement part, inspected and programmed to ensure reliability and performance. It is backed by our one-year warranty for your peace of mind.
Is there a core charge for my old part?
No, there is no core charge associated with this module. You can keep your old part without any hassle or need to return it.