Restore Peak Transmission Performance to Your GMC Savana 3500
Is your 2006-2014 GMC Savana 3500 experiencing harsh shifting, getting stuck in gear, or showing transmission-related error codes? 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 lead to poor performance, decreased fuel economy, and potentially catastrophic transmission damage. This genuine GM T42 TCM, part number 24240449, is the definitive solution to restore your vehicle’s drivability and reliability.
Expert Pro Tip
Before installing your new TCM, always disconnect the vehicle’s battery for at least 15 minutes. This not only ensures your safety but also helps reset the vehicle’s related electronic systems, allowing them to properly recognize and communicate with the new, VIN-programmed module upon reconnection. This simple step can prevent communication errors and ensure a smooth first drive.
Symptoms of a Failing Savana 3500 Transmission Module
A faulty TCM can manifest in various ways, often starting as intermittent issues before becoming persistent problems. If you notice any of the following symptoms, it’s time to inspect your transmission module. Early diagnosis can save you from more costly repairs down the road.
- ✔ Harsh, erratic, or delayed gear shifts that disrupt your driving experience.
- ✔ The vehicle enters “limp mode,” often getting stuck in 2nd or 3rd gear.
- ✔ The Check Engine Light or Transmission Warning Light is illuminated on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related codes are present.
- ✔ A noticeable decrease in fuel efficiency due to improper gear management.
- ✔ Inability to upshift or downshift, or a complete loss of communication with the transmission.
Why Choose Our Pre-Programmed T42 TCM?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take an OEM-quality GM T42 module and professionally program it to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This critical step ensures that the module has the latest factory software and is perfectly calibrated for your Savana’s engine, transmission (4L60E, 4L65E, 4L70E, 4L80E), and specific options. You get a plug-and-play component that eliminates the need for an expensive trip to the dealership for programming. This module is a direct replacement for multiple service numbers, including 24242391, 24234503, and 24252114, guaranteeing broad compatibility and a precise fit.
Frequently Asked Questions
What does ‘VIN Programmed’ mean for this TCM?
It means we load the module with the specific software and calibrations for your exact vehicle using your VIN. This makes the installation plug-and-play, as the module is ready to communicate with your vehicle’s other computers right out of the box, eliminating the need for additional dealership programming.
Is this a difficult part to install myself?
For most DIY mechanics, the installation is straightforward. The TCM is typically located in the engine compartment (often on the RH side for the Savana van). The process involves disconnecting the battery, unplugging the electrical connectors, unbolting the old module, and installing the new one. The entire job can usually be completed in under 30 minutes with basic hand tools.
Will this part fix a P0700 trouble code?
A P0700 code is a general transmission fault code, indicating that the TCM has detected a problem. While a faulty TCM is a very common cause for this code, it’s essential to have a full diagnostic scan to check for other specific codes (like solenoid or sensor faults). However, if your symptoms align with TCM failure, replacing it with our programmed unit is a highly effective solution for resolving P0700 and related codes.
Do I need to return my old TCM?
No, there is no core charge for this part. You can keep your old module, which saves you the time, cost, and hassle of shipping it back.
What vehicles is this T42 module compatible with?
While this listing is focused on the 2006-2014 Savana 3500, this T42 TCM fits a wide range of GM vehicles from that era, including the Chevrolet Silverado, Tahoe, Express; GMC Sierra, Yukon; Buick LaCrosse; Cadillac DTS; and many others equipped with 4-speed automatic transmissions. Please verify the part number or use our fitment tool to confirm compatibility.