Get Your Workhorse Back on the Job with a Reliable Transmission Fix
Is your 2006-2014 GMC Savana 1500 van suffering from hard shifts, getting stuck in gear, or throwing transmission codes? As a technician with over two decades of experience, I know that for a work vehicle like the Savana, downtime is lost income. A faulty Transmission Control Module (TCM) is one of the most common culprits behind these frustrating and costly issues. This replacement T42 TCM, part number 24239224, is the direct-fit, dependable solution to restore your van’s performance and get you back on the road without the hassle and expense of a dealership visit.
This module is the brain of your automatic transmission, controlling everything from shift points to torque converter clutch engagement. When it fails, you’ll feel it immediately. This isn’t just an inconvenience; it can be a safety issue and lead to more severe transmission damage if ignored. We solve the biggest hurdle of this repair by pre-programming the module to your van’s specific VIN. That means it arrives ready for a true plug-and-play installation, restoring the smooth, predictable shifting you depend on every day.
Case Study: A Tricky Diagnosis
A local delivery business brought in their 2011 Savana 1500. The driver reported it was stuck in 3rd gear (limp mode) and the check engine light was on. Our scan tool pulled a P0700 (Transmission Control System Malfunction) and a P0752 (Shift Solenoid ‘A’ Stuck On). The junior tech immediately wanted to drop the pan and replace the solenoid. However, after 20 years of seeing these, I know that on GM vehicles of this era, internal TCM circuit failure often falsely triggers solenoid codes. We swapped in a known-good programmed TCM, cleared the codes, and the van shifted perfectly. The original TCM was the root cause. This pre-programmed module saves you from that diagnostic headache and unnecessary labor costs.
Is Your Savana Showing These Symptoms?
A failing TCM will give you clear warning signs. If you’re experiencing any of the following, it’s time to consider a replacement:
- ✔ Harsh, banging shifts or delayed gear engagement.
- ✔ The vehicle is stuck in a single gear, often called “limp mode.”
- ✔ Check Engine Light is illuminated with transmission-related Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0751, or other solenoid-specific faults.
- ✔ Inability to upshift or downshift, causing poor acceleration and high RPMs.
- ✔ A noticeable drop in fuel economy.
- ✔ The ‘PRNDL’ display on your dash may not show the correct gear.
A Straightforward Guide to Installation
This is a repair most DIYers or any professional mechanic can complete quickly. For the GMC Savana van, the TCM is typically located in the engine compartment on the right-hand (passenger) side. No special tools are needed.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the Module: On your Savana 1500, find the TCM mounted in the engine bay. It’s a silver box with several large electrical connectors.
- Disconnect and Remove: Carefully unplug the electrical harnesses. Be gentle with the locking tabs. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Bolt the new, VIN-programmed module into place. Securely plug in all the electrical connectors until they click.
- Final Steps: Reconnect the negative battery terminal. Start the vehicle and use a standard OBD2 scan tool to clear any stored fault codes. Test drive to confirm smooth shifting.
Verified Vehicle Compatibility
This T42 Transmission Control Module is a direct replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions (like the 4L60E, 4L65E, and 4L70E). While this listing is for the 2006-2014 Savana 1500 Transmission Module, it also fits many other models. Please verify your part number (interchangeable with 24252114, 24234503, etc.) or contact us with your VIN to confirm.
- GMC Savana 1500 / 2500 / 3500 Van (2006-2014)
- Chevrolet Express 1500 / 2500 / 3500 Van (2006-2014)
- Chevrolet Silverado & GMC Sierra (2007-2013)
- Chevrolet Tahoe, Suburban & GMC Yukon (2007-2009)
- Chevrolet Colorado & GMC Canyon (2008-2012)
- Hummer H3 (2008-2010)
- And many more GM cars, trucks, and SUVs.
Frequently Asked Questions
Do I need to program this module?
No. This is the biggest benefit of our service. We pre-program the module to your vehicle’s VIN before shipping. It arrives ready for installation, saving you a trip to the dealership.
Is there a core charge?
No, there is no core charge. You can keep your old part, eliminating the hassle and expense of shipping it back.
Where is the TCM located on my Savana Van?
On the 2006-2014 GMC Savana and Chevrolet Express vans, the Transmission Control Module is typically found in the engine compartment on the right-hand (passenger) side.
What if I have other transmission codes?
This module is designed to resolve faults originating from the TCM itself, including common solenoid codes that are often misdiagnosed. If your issue is a purely mechanical failure within the transmission (like a burnt clutch pack), this module will not fix it. Proper diagnosis is key.
What is the warranty on this part?
This part comes with a one-year replacement warranty, giving you peace of mind that you’re installing a quality, reliable component in your vehicle.