End Transmission Headaches for Your Workhorse Van
If your 2006-2014 GMC Savana 2500 is your livelihood, you can’t afford downtime caused by a faulty transmission. When you experience sudden harsh shifts, getting stuck in gear, or a persistent check engine light, the problem often points directly to a failing Transmission Control Module (TCM). As a technician with over two decades of experience, I’ve seen how a bad TCM can sideline a perfectly good work van. This T42 Transmission Control Module, part number 24256960, is the definitive, reliable fix that gets you back on the job without the costly delays of a dealership visit.
The real value here is our expert VIN programming service. Before we ship it, we flash the module with your van’s specific Vehicle Identification Number and the latest GM software. This means it arrives at your door ready for a true plug-and-play installation. It communicates flawlessly with your vehicle’s engine computer and other systems, restoring the precise, smooth shifting you depend on. This isn’t just a replacement part; it’s a complete solution designed to save you time, money, and diagnostic frustration.
From the Diagnostic Bay: The Case of the Limp-Mode Work Van
A local contractor brought in his 2011 Savana 2500, complaining it was stuck in what felt like third gear—a classic case of ‘limp mode.’ His check engine light was on, and he was losing money every day the van was out of commission. A quick scan showed code P0700 (Transmission Control System Malfunction), a general code that tells you to look deeper into the transmission system. Further diagnosis pointed to an internal failure in the TCM. Instead of a complex transmission rebuild, the solution was a new module. By providing him with a pre-programmed unit, we had him back on the road in under an hour, saving him hundreds compared to the local dealership’s quote and days of lost work.
Is Your Savana Van Showing These Telltale Signs?
A failing TCM doesn’t heal itself; it only gets worse. If you’re noticing any of these issues, it’s time for a replacement. Catching it early can prevent further damage to your transmission’s mechanical components.
- ✔ Harsh, banging shifts or erratic gear changes.
- ✔ Vehicle is stuck in one gear (limp mode) and will not shift up or down.
- ✔ Check Engine Light or Transmission Warning Light is illuminated with codes like P0700, P0750, or other solenoid-related faults.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ A noticeable drop in fuel economy or signs of the transmission overheating.
- ✔ Complete loss of communication with the scan tool or intermittent electrical issues.
A Straightforward Guide to Your Savana TCM Swap
One of the best features of this module is how simple it is to install. For a Savana or Express van, it’s one of the easier jobs you can do. You don’t need a vehicle lift or specialized tools. The entire process should take less than 30 minutes for a DIYer with basic hand tools.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the Module: On your 2006-2014 Savana 2500 Transmission Module, you’ll find it in the engine compartment, typically mounted on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. Then, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed module into place and securely reconnect the electrical harnesses. You’ll hear a click as they lock in.
- Final Steps: Reconnect the battery terminal. Start the vehicle and allow it to idle for a few minutes. While our programming resolves most codes, it’s good practice to use a basic scan tool to clear any stored DTCs.
Verified Vehicle Compatibility
This T42 TCM is a direct replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, 4L70E, and 4L80E. It is interchangeable with numerous part numbers, including 24252114, 24234503, 24230461, and 24256960. While this page focuses on the 2006-2014 Savana 2500 Transmission Module, it also fits:
- GMC: Savana/Express 1500/2500/3500 (06-14), Sierra, Yukon, Envoy, Canyon
- Chevrolet: Silverado, Tahoe, Suburban, Express, Impala (06-11), Cobalt, HHR, Colorado
- Buick: LaCrosse (06-09), Lucerne, Rainier, Rendezvous
- Cadillac: DTS (06-11)
- Pontiac: G6, Grand Prix, G5
- Saturn: Vue, Aura, Ion
- Hummer: H3 (08-10)
- Saab: 9-7X (06-09)
What does ‘VIN Programmed’ actually mean?
What does ‘VIN Programmed’ actually mean?
It means we load your vehicle’s unique 17-digit VIN into the module before shipping. This ensures it has the correct software and calibration files for your specific engine, transmission, and options, making it ready to install right out of the box without any additional programming.
Do I need to take my van to a dealer after installing this?
No. Our VIN programming service completely eliminates the need for a dealership visit for programming, saving you significant time and money.
Is this part difficult to install myself?
Not at all. For most applications, including the Savana van, the TCM is easily accessible in the engine bay. With basic hand tools, most people can complete the swap in under 30 minutes.
Will this fix a P0700 trouble code?
In many cases, yes. The P0700 code indicates a general fault in the transmission control system. If the root cause is a failed TCM, this part is the direct solution. It also resolves many specific solenoid and communication codes.
Is there a core charge?
No, there is no core charge. You are not required to send your old, faulty module back to us, which simplifies the process for you.