Is Your Saturn Vue or GM Vehicle Shifting Erratically?
A faulty Transmission Control Module (TCM) can turn a smooth ride into a frustrating and unpredictable experience. If you’re dealing with harsh shifting, delayed gear engagement, a check engine light with codes like P0700, or your vehicle is stuck in limp mode, the TCM is a primary suspect. This component is the brain of your automatic transmission, responsible for managing every shift point, controlling torque converter lockup, and monitoring system health. When it fails, performance and reliability suffer dramatically. This OEM-quality T42 TCM, service part number 24256960, is the definitive solution for a wide range of General Motors vehicles, including the 2007-2010 Saturn Vue.
From the Diagnostic Bay
We had a 2008 Silverado 1500 in the shop that was driving the owner crazy. He was getting intermittent solenoid codes (P0752, P0757) and had already replaced the A&B shift solenoids twice. The truck would shift perfectly for days, then suddenly start banging into gear and throw a code. After checking the wiring harness for the third time, we focused on the TCM. On the surface, it looked fine, but under load and when it heated up, a hairline crack on the circuit board was causing an intermittent open. This sent faulty signals to the new solenoids, making them seem like the problem. We installed a VIN-programmed T42 TCM, and the problem was solved instantly. It’s a classic case of the symptoms not always pointing directly to the root cause; sometimes, you have to look at the component giving the orders.
Restore Peak Performance with a Programmed 2007-2010 Saturn Vue TCM
Don’t settle for unpredictable transmission behavior or pay exorbitant dealership fees for programming a new module. This T42 TCM comes fully pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures that the module has the correct software and calibrations for your vehicle’s engine, tire size, and axle ratio right out of the box. The result is a seamless, plug-and-play installation that restores the smooth, precise shifting you expect from your vehicle. By providing your VIN at checkout, you receive a part that is ready for immediate installation, saving you time, money, and a trip to the dealer.
Common Symptoms of a Failing T42 TCM
- ✔ Harsh, erratic, or delayed gear shifts.
- ✔ Vehicle stuck in a single gear (limp mode), often 2nd or 3rd.
- ✔ Illuminated Check Engine Light or Transmission Warning Light.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, P0751, P0753, P0756, and other solenoid-related faults.
- ✔ Failure to upshift or downshift properly.
- ✔ Decreased fuel economy and potential for transmission overheating.
- ✔ Complete loss of communication with the TCM, leading to a no-start or no-shift condition.
Key Features and Direct Benefits
- ✔ VIN Programmed for You: Arrives ready for installation with the latest GM software updates specific to your vehicle, ensuring optimal performance without needing a scan tool for setup.
- ✔ Restores Smooth Operation: Correctly manages shift solenoids and hydraulic pressure to eliminate harsh shifting and gear hunting.
- ✔ OEM-Standard Quality: Built to meet or exceed original equipment specifications for durability and long-term reliability.
- ✔ Broad Compatibility: A direct replacement for a wide array of GM cars, trucks, and SUVs equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E.
- ✔ No Core Charge: Keep your old part without the hassle or expense of returning a core.
Simple Installation Process
Replacing the TCM is a straightforward job for a confident DIY mechanic and can typically be completed in under 30 minutes. The module is located in the engine compartment, with common locations being on the LH strut tower (Cobalt, G6), next to the battery (Silverado, Tahoe), or under the air cleaner box (Impala, LaCrosse). Always disconnect the negative battery terminal before starting work to ensure safety and help reset the vehicle’s electronic systems. After installing the new module, reconnect the battery and use a basic OBD2 scanner to clear any stored fault codes. Your transmission should now operate as intended.
This module is a direct replacement for multiple service numbers, including 24252114, 24234503, 24230461, 24234274, 24256960, and more, making it the ideal part for your repair. Whether you’re fixing a family SUV like a Yukon or a daily driver like a Saturn Aura, this programmed 2007-2010 Saturn Vue TCM delivers dependable, lasting results.
Frequently Asked Questions
Why is VIN programming so important for a TCM?
VIN programming loads your vehicle’s specific factory software and calibrations onto the module. This tells the TCM about your engine size, axle ratio, tire size, and other critical parameters. Without the correct programming, the transmission will not shift at the right points, which can lead to poor performance, damage to the transmission, and persistent error codes.
Will this module fix a P0700 trouble code?
A P0700 code is a general fault code, meaning the TCM has detected a problem and has requested the check engine light to be turned on. While a failing TCM is a very common cause of a P0700 code, it can also be triggered by other issues like faulty solenoids or wiring. Replacing a known-bad TCM will often resolve the P0700 and any related specific codes (like P0751, etc.).
Is this a difficult part to install myself?
For most individuals with basic mechanical skills, this is a very manageable job. The TCM is typically easy to access in the engine bay. The process involves disconnecting the battery, unplugging the electrical connectors, unbolting the old module, and then reversing the process. No special tools are usually required beyond a basic socket set.
What happens if I install a TCM that isn’t programmed?
An unprogrammed TCM will not work correctly. Your vehicle may not start, or if it does, the transmission will likely be in limp mode, refusing to shift out of a default gear. It will not communicate properly with the other modules in your vehicle, leading to a host of error codes and driveability issues.
Does this part fit vehicles other than the Saturn Vue?
Yes, absolutely. The T42 TCM was used in a massive range of GM vehicles from approximately 2006 to 2014, including Chevrolet Silverado, Tahoe, Impala; GMC Sierra, Yukon; Buick LaCrosse; Pontiac G6; and many others with 4-speed automatic transmissions. Our programming ensures it works perfectly for the specific vehicle you order it for.