Restore Peak Transmission Performance in Your Workhorse Van
As a professional, you know that a work van like the 2006-2014 GMC Savana 1500 is more than just a vehicle—it’s your business partner. When the transmission starts acting up, it’s not just an inconvenience; it’s a threat to your livelihood. Harsh shifts, delayed gear engagement, or a check engine light can sideline your van, costing you time and money. This is where our VIN-programmed T42 Transmission Control Module (TCM), part number 24252114, comes in. It’s the reliable, direct-fit solution designed to get your Savana back on the job without the hassle and expense of a dealership visit.
Over my 20+ years in diagnostics, I’ve seen countless GM vehicles, especially work vans, come in with what seems like a major transmission failure. More often than not, the culprit is a faulty TCM. This module is the brain of your automatic transmission, controlling everything from shift points to torque converter clutch lockup. When it fails, communication breaks down, leading to the frustrating symptoms you’re likely experiencing. Our replacement Savana 1500 Van TCM is pre-programmed to your specific Vehicle Identification Number (VIN), ensuring it communicates flawlessly with your van’s powertrain control module (PCM) and other systems right out of the box.
Case Study: A Tricky Diagnosis
A local contractor brought in his 2011 Savana 1500, complaining of intermittent ‘limp mode’ and a flashing transmission light. He’d already replaced two shift solenoids based on DTCs, but the problem persisted. His scanner showed a generic P0700 (Transmission Control System Malfunction) code. Instead of throwing more parts at it, we looked at the live data. We noticed erratic voltage readings from the TCM. After swapping in one of our VIN-programmed modules, the codes cleared, the voltage stabilized, and the van shifted perfectly. He saved hundreds, if not thousands, by avoiding an unnecessary transmission rebuild and got his work van back on the road the same day.
Is Your Van’s Transmission Acting Up? Watch for These Signs
A failing TCM can mimic a host of other mechanical issues. Before you suspect a costly internal transmission problem, check if your vehicle is exhibiting these common electronic failure symptoms. A new Savana 1500 Van TCM is often the fix.
- ✔ Harsh, slamming shifts or erratic gear hunting.
- ✔ The vehicle gets stuck in one gear (often 2nd or 3rd) and won’t shift up or down.
- ✔ Check Engine Light or Transmission Warning Light is illuminated with codes like P0700, P0750, P0755, or other solenoid-related faults.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ A noticeable decrease in fuel economy due to inefficient shifting.
- ✔ Complete loss of communication with the TCM, preventing diagnostics.
A Straightforward Guide to Installation
For the Savana and Express vans, this is one of the easier module replacements you can do. You don’t need a vehicle lift or specialized tools, making it a perfect job for a DIYer or a quick task for a professional mechanic. The entire process should take less than 30 minutes.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the onboard systems.
- Locate the TCM: On the 2006-2014 Savana 1500 Van, the TCM is typically located in the engine compartment on the right-hand (passenger) side. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unclip the wiring harness connectors. Then, unbolt the module from its mounting bracket. There are usually two or three small bolts holding it in place.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Reconnect the wiring harnesses, ensuring they click securely into position.
- Reconnect and Verify: Reconnect the negative battery terminal. Start the vehicle and let it idle for a minute. Use a basic OBD2 scan tool to clear any stored fault codes. Take the van for a test drive to confirm that shifting is smooth and all warning lights are off.
Verified Vehicle Compatibility
While this part is an exact fit for the Savana 1500 Van TCM, it is also compatible with a wide range of other General Motors vehicles that use the T42 controller and 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. Always verify your part number or contact us with your VIN to ensure perfect fitment.
This module is interchangeable with part numbers: 24252114, 24242391, 24234503, 24230461, 24234274, 24235340, and many others. It fits models including the Chevrolet Silverado, Tahoe, Express, Impala; GMC Sierra, Yukon; Cadillac DTS; Buick Lucerne; Pontiac G6; and Hummer H3 from 2006-2014, among others. See the full fitment list for details.
Frequently Asked Questions
What does ‘VIN Programmed’ actually mean?
It means we load your vehicle’s specific VIN into the module before shipping. This ensures it has the correct software and calibration files to work perfectly with your engine, transmission, and options. It’s a true plug-and-play solution that eliminates the need for an expensive trip to the dealer for programming.
Do I need to send my old TCM back (core charge)?
No, there is absolutely no core charge. You can keep your old part, so you won’t have to worry about packaging it up and shipping it back to us.
Will this 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 (like internal shorts or logic failure), you should always check for any other specific codes (e.g., P0751, P0756) that might point to a solenoid or wiring issue first. In many cases, replacing a faulty TCM will clear the P0700 code for good.
Is this part covered by a warranty?
Yes, all of our programmed electronic modules are backed by a one-year, hassle-free warranty, giving you peace of mind with your purchase.