If your 2006-2014 GMC Savana 2500 Van is your livelihood, you can’t afford the downtime that comes with transmission problems. As a mechanic with over two decades of experience, I’ve seen firsthand how a faulty Transmission Control Module (TCM) can bring a reliable workhorse to a dead stop. Erratic shifting, getting stuck in gear, or a persistent check engine light can sideline your van and your business. This is the definitive solution: a direct-fit T42 TCM, part number 24252114, pre-programmed specifically for your van’s VIN.
This isn’t just a part; it’s a promise to get you back on the road without the hassle and expense of a dealership visit. We handle all the programming before it ships. When it arrives, it’s ready for a plug-and-play installation, restoring the crisp, predictable shifting and reliable performance your Savana is known for. It correctly manages shift points, torque converter lockup, and line pressure for the robust 4L80E or other compatible transmissions, ensuring longevity and efficiency.
Case Study: The “Intermittent” Savana Shifting Nightmare
A local contractor brought in his ’09 Savana 2500. The complaint was baffling: some days it shifted perfectly, other days it would slam into gear or refuse to upshift past 3rd. He’d already replaced a shift solenoid with no luck. After hooking up my scan tool, I noticed intermittent communication loss with the TCM, but no hard codes besides the generic P0700. These ghost-like electrical issues are a classic sign of a failing TCM’s internal circuit board. Instead of a costly diagnostic rabbit hole, we installed one of our VIN-programmed modules. The total time from diagnosis to him driving away was under an hour. That’s the certainty this part provides—it’s a direct fix for a common, frustrating problem.
Is Your Work Van Showing These Red Flags?
A failing Savana 2500 TCM doesn’t always mean a complete transmission failure. Catching these symptoms early can save you from more expensive repairs down the line. Look out for:
- ✔ Harsh, delayed, or erratic gear changes.
- ✔ The van feels stuck in one gear (often called “limp mode”).
- ✔ Check Engine Light is on with transmission-related Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0753, P0758, or other solenoid circuit faults.
- ✔ Sudden loss of power or poor acceleration.
- ✔ Decreased fuel economy due to inefficient shifting.
- ✔ The ‘PRNDL’ display on your dash may not show the correct gear.
A Straightforward Guide to Your Savana TCM Swap
One of the best features of this module is its simple installation. You don’t need specialized equipment, just basic hand tools. For the Savana 2500 TCM, the process is quick and gets your van back in service fast.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: On the GMC Savana and Chevrolet Express vans, the TCM is typically found in the engine compartment on the right-hand (passenger) side, often near the main fuse block.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs, so be gentle. Then, unbolt the old module from its mounting bracket.
- Install the New TCM: Bolt the new, pre-programmed module into place and securely reconnect the electrical harnesses. You should hear a ‘click’ as they lock.
- Final Steps: Reconnect the battery terminal. Start the vehicle and allow it to idle for a few minutes. If you have a basic scan tool, it’s good practice to clear any stored fault codes. Take the van for a test drive to confirm smooth shifting.
Verified Vehicle Compatibility
This T42 TCM is a direct replacement for part number 24252114 and other interchangeable numbers. While it is programmed for your 2006-2014 GMC Savana 2500 Van, it is also physically compatible with a wide range of GM vehicles, including:
- GMC: Savana / Express 1500, 2500, 3500 (2006-2014), Sierra, Yukon, Envoy, Canyon
- Chevrolet: Silverado, Tahoe, Suburban, Avalanche, Colorado, Impala, Cobalt, HHR
- Buick: LaCrosse, Lucerne, Rainier
- Cadillac: DTS
- Pontiac: G6, Grand Prix
- Hummer: H3
- Saturn: Vue, Aura, Ion
- Saab: 9-7X
Note: Programming is specific to the VIN you provide at checkout. Please ensure your vehicle is listed and provide an accurate VIN for guaranteed compatibility.
Frequently Asked Questions
Do I need to take my van to the dealer for programming?
No. This is the biggest benefit. We program the module to your van’s specific VIN before we ship it. It arrives ready to install, saving you time and hundreds of dollars in dealership programming fees.
Is this a difficult part for a DIYer to install?
Not at all. On the Savana 2500, the TCM is easily accessible in the engine bay. With basic hand tools, most people can complete the swap in under 30 minutes. Just follow our installation guide.
What happens if I install it and the problem doesn’t go away?
While this module is the definitive fix for TCM failure, transmission issues can be complex. If problems persist, it could indicate a mechanical issue within the transmission (like a bad solenoid or clutch pack) that the TCM was correctly reporting. Our expert support team is here to help you diagnose the issue further.
Is there a core charge? Do I need to send my old part back?
No. We do not require a core return. You can keep your old part, which saves you the hassle and cost of return shipping.
What kind of warranty is included?
This module is backed by our one-year, hassle-free warranty, giving you peace of mind that you’re installing a quality, reliable part in your work vehicle.