Is Your GMC Savana Van Shifting Erratically?
If your 2006-2014 GMC Savana 1500 is experiencing harsh shifting, getting stuck in gear, or displaying a check engine light with transmission-related codes, a failing Transmission Control Module (TCM) is the most likely culprit. The TCM is the electronic brain of your automatic transmission, responsible for orchestrating every gear change and ensuring smooth, efficient operation. When it fails, it can cause a cascade of frustrating and potentially damaging issues, turning your reliable workhorse into an unpredictable vehicle. Don’t let a faulty module compromise your van’s performance. This direct-fit, VIN-programmed T42 TCM is the definitive solution to restore your transmission’s factory function.
From the Diagnostic Bay
We had a 2011 Savana 2500 in the shop that was stuck in third gear—classic limp mode. The owner had already replaced two shift solenoids based on the trouble codes, but the problem persisted. After a quick scan, we saw the P0700 code, which is a general transmission fault request. Digging deeper, we found intermittent communication loss with the TCM. Instead of throwing more parts at it, we identified the root cause: the original module was failing internally. We installed one of our VIN-programmed T42 modules, cleared the codes, and the van was shifting perfectly within 30 minutes. It’s a reminder that sometimes the controller is the problem, not the components it’s controlling.
Symptoms of a Failing Savana 1500 TCM
A failing TCM can manifest in several ways. If you’re noticing any of the following signs, it’s time to consider a replacement to avoid further transmission damage:
- ✔ Harsh, jerky, or delayed gear shifts that disrupt smooth driving.
- ✔ The vehicle enters “limp mode,” often getting stuck in 2nd or 3rd gear.
- ✔ An illuminated Check Engine Light or Transmission Warning Light on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-specific codes.
- ✔ Inability to upshift or downshift, leading to poor acceleration and fuel economy.
- ✔ The transmission seems to slip out of gear or struggles to engage Drive or Reverse.
- ✔ Unexplained electrical issues that seem to coincide with shifting problems.
The Plug-and-Play Solution: VIN Programming Included
Forget expensive dealership visits and the hassle of programming a new module. This T42 TCM arrives at your door pre-programmed to your Savana’s specific Vehicle Identification Number (VIN). This critical step ensures that the module communicates flawlessly with your vehicle’s engine computer (ECU) and other systems right out of the box. We load the latest GM software updates, which often corrects factory flaws and improves transmission behavior. This means no special tools, no additional costs, and no complicated procedures—just a straightforward installation to get you back on the road fast.
This module is a direct replacement for a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, 4L70E, and 4L80E. It’s built to meet or exceed original equipment specifications, ensuring long-lasting reliability and performance. By replacing your faulty Savana 1500 TCM, you restore precise electronic control over shift points, torque converter lockup, and line pressure, resulting in a smoother ride, better fuel efficiency, and peace of mind.
Easy Installation
Installation is simple for a DIY mechanic or professional technician. On most Savana and Express vans, the TCM is located in the engine compartment on the right-hand side. The process typically takes less than 30 minutes. Always disconnect the vehicle’s battery before starting to prevent electrical damage and help reset the system. After installing the new module, reconnect the battery and use a standard OBD2 scan tool to clear any stored fault codes. No core charge is required, so you can keep your old part without any hassle.
This TCM is interchangeable with numerous part numbers, including 24252114, 24234503, 24230461, 24240449, and many more, making it a versatile solution for countless GM trucks, vans, and SUVs from this era.
Will this TCM fit my vehicle if it’s not a Savana 1500?
Yes, this T42 TCM is compatible with a wide range of 2006-2014 GM vehicles, including the Chevrolet Silverado, Tahoe, Express, GMC Sierra, Yukon, Cadillac DTS, and more. Please check the detailed fitment list on this page or contact us with your VIN to confirm compatibility.
What does ‘VIN Programmed’ mean?
‘VIN Programmed’ means we flash the module with your vehicle’s specific software using your VIN before shipping it. This makes the part plug-and-play, as it’s already configured to work with your vehicle’s engine and transmission, eliminating the need for expensive dealership programming.
Do I need any special tools to install this part?
No special tools are required. Basic hand tools to access and unbolt the module, such as a socket set, are all that’s typically needed. We do recommend using an OBD2 scanner to clear any remaining diagnostic trouble codes after installation is complete.
Is there a core charge for my old TCM?
No, we do not require a core charge. You can keep your old module without any obligation to send it back, saving you time and money on return shipping.
What if my part number is slightly different?
This module replaces many different GM service numbers. Please review the interchange part number list in our description. As long as your original part number is on that list, this module will function as a direct replacement.