Get Your Workhorse Van Back on the Road
If your 2006-2014 GMC Savana 2500 is your livelihood, you can’t afford downtime caused by a faulty transmission. As a technician with over two decades of experience, I know that symptoms like harsh shifting, getting stuck in gear, or an illuminated check engine light can bring your work to a grinding halt. The Transmission Control Module (TCM), the brain of your automatic transmission, is often the culprit. This VIN-programmed T42 TCM, part number 24256960, is the direct-fit, reliable solution you need to restore proper transmission function and get back to business.
Case Study: A Tricky Diagnosis
A local contractor brought in his ’09 Savana 2500. The van would intermittently refuse to shift out of 2nd gear, especially after getting hot on a long job. He’d already replaced a shift solenoid with no luck. On my scan tool, I saw a generic P0700 code but also intermittent communication loss codes with the TCM. Instead of just throwing more parts at it, we inspected the module itself. After 200,000 miles of heat cycles and vibration in the engine bay, the internal circuits of the original TCM were failing. We installed one of our VIN-programmed modules, and the van was shifting perfectly within 30 minutes. This pre-programmed 2006-2014 Savana 2500 TCM saved him from a costly exploratory repair at the dealer and got his van back to the job site the same day.
Is Your Savana Van Showing These Telltale Signs?
A failing TCM doesn’t always mean a complete transmission failure. Catching these symptoms early can save you from more extensive damage. Look out for:
- ✔ Unpredictable or harsh gear shifts that slam into place.
- ✔ The vehicle being stuck in “limp mode,” often in 2nd or 3rd gear.
- ✔ Check Engine Light or Transmission Warning Light is on, with Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ A sudden drop in fuel economy or the transmission overheating.
- ✔ Complete loss of communication with the module, preventing shifting.
A Straightforward Guide to Installation
You don’t need to be a master mechanic to replace this module. For most GM vans like the Savana or Express, the process is simple and can be done with basic hand tools.
- Safety First: Always disconnect the negative terminal on your vehicle’s battery before starting any electrical work.
- Locate the TCM: On your Savana 2500, the TCM is typically found in the engine compartment on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unclip the electrical connectors. Be gentle to avoid breaking the plastic tabs. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical harnesses. You should hear a ‘click’ as they lock in.
- Reconnect and Verify: Reconnect the battery terminal. Start the vehicle and allow it to idle. The new module is pre-programmed, so no dealer visit is needed. We recommend using a basic scan tool to clear any stored fault codes from the ECU.
Verified Fitment For These GM Models
While this is the ideal 2006-2014 Savana 2500 TCM, it is also a direct replacement for a wide range of GM cars, trucks, and SUVs equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L80E. This module is interchangeable with part numbers 24252114, 24234503, 24256960, and more. Please verify your specific model below:
- Chevrolet: Avalanche, Cobalt, Colorado, Express/Savana Van (1500, 2500, 3500), HHR, Impala, Malibu, Monte Carlo, Silverado, SSR, Tahoe, Suburban
- GMC: Canyon, Envoy, Sierra, Yukon
- Buick: Allure, LaCrosse, Lucerne, Rainier, Rendezvous
- Pontiac: G5, G6, Grand Prix, Pursuit, Montana
- Cadillac: DTS
- Saturn: Aura, Ion, Vue
- Hummer: H3
- Saab: 9-7X
Frequently Asked Questions
Do I need to have this module programmed by a dealer?
No. We pre-program the module to your vehicle’s specific VIN before shipping. This ensures it is ready for immediate installation right out of the box, saving you time and money.
Is this a difficult part to install myself?
Not at all. For a Savana Van, the TCM is easily accessible in the engine bay. With basic hand tools, most DIYers can complete the replacement in under 30 minutes.
What is the warranty on this part?
This module comes with a one-year warranty, giving you peace of mind that you’re installing a quality, reliable part in your vehicle.
Will this fix a P0700 trouble code?
A P0700 code is a general transmission fault request. While a failing TCM is a very common cause for this code, you should always diagnose any other accompanying codes. In many cases, replacing a faulty TCM will resolve the P0700 code.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old part without the hassle of needing to return it.