Get Your Work Van Back on the Road with a Reliable Transmission Fix
If your 2006-2014 GMC Savana 1500 is your workhorse, you can’t afford downtime caused by a faulty transmission. When you experience harsh, unpredictable shifting or your van gets stuck in limp mode, the problem is often a failing Transmission Control Module (TCM). I’ve seen it countless times in my 20+ years as a technician: a perfectly good transmission sidelined by a bad electronic module. This T42 TCM, equivalent to part number 24234274, is the definitive solution, arriving pre-programmed to your van’s specific VIN. This means no expensive trips to the dealership for programming—it’s a true plug-and-play fix that restores the smooth, reliable performance you depend on.
Case Study: A Tricky Diagnosis
A local contractor brought his ’09 Savana 2500 into the shop, complaining of intermittent, violent 1-2 shifts and occasionally getting stuck in 3rd gear with a P0700 code. He’d already replaced two shift solenoids with no luck. The problem was elusive because it only happened when the van was hot after a long day of driving. After hooking up my scan tool and monitoring live data, I saw the TCM was sending erratic commands to the solenoids. We installed one of our VIN-programmed T42 modules, and the problem was solved instantly. He saved hundreds by avoiding a full transmission rebuild and got his work van back on the job the same day.
Is Your Savana Van Showing These Transmission Problems?
A failing TCM can mimic more serious mechanical issues. Before you suspect a costly internal failure, check if your van is exhibiting these classic signs of a bad module:
- ✔ Hard, slamming shifts or delayed gear engagement.
- ✔ The vehicle is stuck in a single gear (often called “limp mode”).
- ✔ Check Engine Light is on with transmission-related Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0755, or other solenoid circuit faults.
- ✔ Inconsistent or no upshifting, leading to poor acceleration and terrible fuel mileage.
- ✔ A complete loss of communication with the transmission, making the vehicle undrivable.
A Straightforward Guide to Your 2006-2014 Savana 1500 TCM Installation
This is a job most DIYers or any professional mechanic can complete in under 30 minutes with basic hand tools. Our VIN programming makes it a simple component swap.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic component replacement.
- Locate the Module: On the 2006-2014 Savana 1500 Van, the TCM is conveniently located 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 TCM: Mount the new module securely onto the bracket and firmly reconnect the electrical harnesses until they click into place.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s always best practice to use a standard OBD2 scan tool to clear any stored fault codes from the vehicle’s memory.
Verified Vehicle Compatibility
This T42 TCM is a direct-fit replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L80E. While this page focuses on the 2006-2014 Savana 1500 TCM, it also fits:
- Chevrolet: Silverado, Tahoe, Suburban, Express Van, Impala, HHR, Cobalt
- GMC: Sierra, Yukon, Savana Van, Envoy, Canyon
- Buick: LaCrosse, Lucerne, Rainier
- Cadillac: DTS
- Pontiac: G6, Grand Prix
- And more, including select Hummer, Saab, and Saturn models.
This part is interchangeable with service numbers 24252114, 24234503, 24230461, 24234274, 24235340, and others.
Frequently Asked Questions
Do I need to have a dealer program this module?
No. We program the module to your vehicle’s VIN before shipping. It arrives ready for immediate installation, saving you time and money on dealership fees.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM to the main engine computer. While this module often resolves the underlying issue causing the P0700 (like a bad solenoid circuit inside the TCM), you should always diagnose any other specific codes that are present.
Where is the TCM located on my 2011 Savana 1500?
For the 2006-2014 Savana Van series (1500, 2500, 3500), the TCM is found in the engine bay on the right-hand (passenger) side.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module without any hassle or extra cost.
What kind of warranty is included?
This module is backed by our one-year warranty, covering any defects for your peace of mind.