Restore Peak Performance to Your GM Vehicle’s Transmission
Is your 2006-2014 GMC Savana 1500, Chevrolet Express, or other GM vehicle suffering from erratic shifting, getting stuck in gear, or displaying transmission-related warning lights? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating shift points, managing torque converter lockup, and ensuring smooth, efficient operation. When it fails, it can cripple your vehicle’s drivability and leave you stranded. This genuine OEM-quality T42 TCM, service number 24235732, is the definitive solution to restore your transmission’s functionality and your peace of mind.
From the Diagnostic Bay
We had a local contractor bring in his 2011 Savana 2500 work van. The complaint was simple but severe: the van was stuck in 3rd gear (limp mode) and the check engine light was on. He was losing time and money every day it was down. A quick scan pulled code P0700, a generic transmission fault. Digging deeper, we found codes related to solenoid performance. Instead of chasing individual solenoids on a high-mileage van, we suspected the central controller. We confirmed the diagnosis and ordered this exact VIN-programmed T42 module. The installation took less than 20 minutes in the engine bay. After connecting it and clearing the codes, the van shifted perfectly on the test drive. The customer was back on the road the same day, avoiding a costly and lengthy dealership visit.
Common Symptoms of a Defective TCM
A failing TCM can manifest in various ways, often becoming progressively worse. If you’re experiencing any of the following issues, your module is the likely culprit. Replacing it promptly can prevent further damage to your transmission’s mechanical components.
- âś” Harsh, delayed, or unpredictable gear shifts.
- âś” The vehicle feels stuck in one gear, commonly known as “limp mode.”
- âś” Check Engine Light or Transmission Warning Light is illuminated on the dashboard.
- âś” Diagnostic Trouble Codes (DTCs) such as P0700, P0750, P0753, P0758, or other solenoid-specific codes are present.
- âś” Failure to upshift or downshift, leading to poor acceleration and high RPMs.
- âś” A noticeable decrease in fuel economy.
- âś” The transmission seems to slip out of gear or has difficulty engaging Drive or Reverse.
The Superior Solution: A Pre-Programmed 2006-2014 Savana TCM
Don’t settle for a generic, unprogrammed module that requires an expensive trip to the dealership for coding. Our T42 TCM arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures that the module communicates flawlessly with your vehicle’s Engine Control Unit (ECU) and other systems right out of the box. We load the latest GM software updates, which often correct factory flaws and improve transmission performance beyond its original state. This plug-and-play approach eliminates the need for specialized tools or software, making the replacement process simple for both professional technicians and capable DIYers.
This module is a direct replacement for a wide array of part numbers, including 24252114, 24234503, 24230461, 24234274, and 24235732. It is engineered to meet or exceed original equipment specifications, providing a reliable and long-lasting repair for your 4-speed automatic transmission (4L60E, 4L65E, 4L70E, 4L80E).
Frequently Asked Questions
What is VIN programming and why is it necessary?
VIN programming is the process of loading your vehicle’s specific software and calibration files onto the TCM. Each vehicle has unique parameters based on its engine, axle ratio, and tire size. Programming ensures the TCM makes precise shifting decisions for optimal performance, fuel economy, and longevity. Without it, the module will not function correctly.
Is this a difficult part to install?
No, for most models this is a straightforward installation. The TCM is typically located in the engine compartment (e.g., next to the battery, on the strut tower, or under the air cleaner box). The process involves disconnecting the battery, unplugging the electrical connectors from the old module, unbolting it, and installing the new one in its place. The entire job can usually be completed in under 30 minutes.
Do I need to return my old TCM (core charge)?
No, there is no core charge for this part. You can keep your old module or dispose of it without the hassle of returning it, saving you time and money on core shipping fees.
Will this fix my specific transmission problem?
This module is designed to correct issues directly caused by a faulty TCM, such as the symptoms listed above (erratic shifting, limp mode, specific DTCs). While it is a very common point of failure, we always recommend a proper diagnosis by a qualified mechanic to confirm the TCM is the root cause before ordering.
How do I provide my VIN for programming?
During the checkout process, you will be prompted to enter your vehicle’s 17-digit VIN. Please double-check it for accuracy, as the programming is based entirely on this number. An incorrect VIN will result in an incompatible part.