As a technician with over two decades of experience, I know that when a workhorse like your 2006-2014 GMC Savana 2500 starts acting up, it’s more than an inconvenience—it’s a hit to your bottom line. Erratic shifting, getting stuck in gear, or a glowing check engine light can sideline your van indefinitely. The culprit is often a failing Transmission Control Module (TCM), the electronic brain of your automatic transmission. This replacement T42 TCM, part number 24241806, is the definitive solution to get your van back on the road and running reliably.
This isn’t just a part; it’s a complete, ready-to-install fix. We pre-program each module to your van’s specific Vehicle Identification Number (VIN) before it ships. This crucial step ensures seamless communication with your vehicle’s systems, eliminating the need for expensive dealership programming. By installing this module, you’re directly addressing the root cause of many common transmission problems found in the 4L60E, 4L65E, 4L70E, and 4L80E transmissions.
A Technician’s Notebook
I recently worked on a 2011 Savana 2500 for a local delivery business. The driver reported that the van would randomly refuse to shift out of 2nd gear, especially after it warmed up. He’d already replaced a shift solenoid with no luck. A quick scan showed a P0700 (Transmission Control System Malfunction) code, but nothing more specific. Experience pointed me to the TCM. Heat soak was causing an internal failure, creating an intermittent open circuit. Instead of a costly diagnostic chase, we installed one of our VIN-programmed T42 modules. The van was back in service the same afternoon, shifting perfectly. That’s the value of a direct-fit, pre-programmed solution—it minimizes downtime and prevents throwing parts at a problem.
Is Your Work Van Showing These Telltale Signs?
- ✔ Harsh, clunky, or delayed gear shifts that make driving unpredictable.
- ✔ The transmission feels like it’s slipping or failing to engage properly.
- ✔ Your van is stuck in “limp mode,” usually in a single gear (like 2nd or 3rd) to protect the transmission.
- ✔ The Check Engine Light or a specific transmission warning light is illuminated on your dash.
- ✔ You’ve pulled Diagnostic Trouble Codes (DTCs) like P0700, P0750, or other solenoid-related faults.
- ✔ A noticeable drop in fuel economy or signs of the transmission overheating.
A Straightforward Guide to Installation
For the GMC Savana and Chevrolet Express vans, this is a very accessible repair. You can have your vehicle back to normal in under 30 minutes with basic hand tools.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and help reset the system.
- Locate the Module: In your 2006-2014 Savana 2500, the transmission module is located in the engine compartment on the right-hand (passenger) side.
- Swap the Part: Carefully unplug the electrical connectors from the old TCM. Unbolt it from its mounting bracket and set it aside. Bolt the new module in its place and securely reconnect the wiring harnesses.
- Final Steps: Reconnect the battery terminal. While the system may reset on its own, it’s best practice to use a standard OBD2 scan tool to clear any stored fault codes from the vehicle’s memory.
Verified Fitment Across the GM Lineup
While this is the perfect 2006-2014 Savana 2500 Transmission Module, it also serves as a reliable replacement for a wide range of GM vehicles. This module is interchangeable with part numbers 24252114, 24234503, 24241806, and others. It is compatible with the following models:
- ✔ Chevrolet: Silverado, Tahoe, Suburban, Express, Impala, Cobalt, HHR, Monte Carlo, Avalanche
- ✔ GMC: Sierra, Yukon, Savana, Envoy, Canyon
- ✔ Buick: LaCrosse, Lucerne, Allure, Rainier, Rendezvous
- ✔ Cadillac: DTS
- ✔ Pontiac: G6, G5, Grand Prix, Pursuit
- ✔ Saturn: Vue, Aura, Ion
- ✔ Hummer: H3
- ✔ Saab: 9-7X
Note: Location of the module varies by vehicle model. Please verify the location on your specific vehicle before ordering.
Frequently Asked Questions
Q: What does ‘VIN Programmed’ actually mean?
A: 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 for your specific engine, transmission, and options, allowing it to work perfectly right out of the box without a trip to the dealer.
Q: Do I need any special tools to install this?
A: No. Basic hand tools like a socket set are all that’s required for the physical installation. A simple OBD2 scanner is recommended to clear any old codes after the new module is in place.
Q: Will this fix a P0700 code on my Savana?
A: A P0700 code is a general fault indicating the TCM has detected a problem. While a faulty TCM is a very common cause, you should ensure other potential issues (like wiring or solenoids) have been ruled out. However, if you’re experiencing shifting symptoms along with the code, this module is the most likely solution.
Q: Is there a core charge for my old part?
A: No, there is no core charge. You can keep your old module without the hassle of returning it, saving you time and money.
Q: What kind of warranty comes with this module?
A: This module is backed by our one-year warranty, giving you peace of mind that you’re installing a quality, dependable part in your vehicle.