Fix Your Van’s Shifting Problems for Good
If your 2006-2014 GMC Savana 1500 Van is suffering from harsh shifting, getting stuck in gear, or throwing transmission codes, a failing Transmission Control Module (TCM) is the most likely culprit. As a workhorse vehicle, any downtime means lost time and money. This replacement T42 TCM, part number 24235753, is the reliable, plug-and-play solution to get your van’s automatic transmission operating smoothly again. It arrives expertly programmed to your van’s VIN, eliminating the need for expensive dealership visits and getting you back on the road fast.
From the Diagnostic Bay: A Common Savana Story
Just last week, a contractor brought in his ’09 Savana 1500. The complaint was classic: the van would randomly refuse to shift out of 2nd gear, and the check engine light was on. A quick scan showed a P0700 (Transmission Control System Malfunction) and a couple of solenoid circuit codes. After verifying the wiring harness was intact, we knew it was the TCM. These modules, especially the T42 generation, are notorious for internal electronic failures from heat and vibration. We swapped in a VIN-programmed module like this one, cleared the codes, and the van was shifting perfectly on the test drive. It’s a textbook repair I’ve done hundreds of times.
Is Your Savana Van Exhibiting These Symptoms?
A faulty TCM can cause a host of frustrating issues. If you’re experiencing any of the following, it’s time to consider a replacement:
- ✔ Unpredictable or jarring shifts between gears.
- ✔ The transmission feels like it’s slipping or failing to engage properly.
- ✔ Your van is stuck in “limp mode,” often locked in 2nd or 3rd gear.
- ✔ The Check Engine Light or a transmission-specific warning light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0751, or other solenoid-related faults are present.
- ✔ A noticeable drop in fuel economy due to inefficient shifting.
- ✔ Complete loss of communication with the transmission module.
A Straightforward Guide to Installation
You don’t need to be a master mechanic to install this part. For the GMC Savana and Chevrolet Express vans, the process is simple and can be done in under 30 minutes with basic hand tools.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the TCM: On the 2006-2014 Savana 1500 Van, the TCM is typically found in the engine compartment on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. 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 connectors. Ensure they click into place.
- Final Steps: Reconnect the battery terminal. Start the vehicle and use a basic OBD2 scan tool to clear any stored fault codes from the computer’s memory. Your van is ready for a test drive.
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 page focuses on the 2006-2014 Savana 1500 Van TCM, it also fits the following models. Always verify your part number (24235753) or consult the list below.
- GMC: Savana 1500/2500/3500 Van (06-14), Sierra 1500/2500 Pickup (07-13), Yukon / Yukon XL (07-09), Envoy (06-09), Canyon (08-12)
- Chevrolet: Express 1500/2500/3500 Van (06-14), Silverado 1500/2500 Pickup (07-13), Tahoe (07-09), Suburban 1500 (07-08), Avalanche 1500 (07-08), Cobalt (06-10), HHR (06-11), Impala (06-11), Malibu (06-10), Monte Carlo (06-07), Colorado (08-12), SSR (05-06), Trailblazer (06-09)
- Buick: LaCrosse (06-09), Lucerne (06-11), Rainier (06-07), Rendezvous (06-07)
- Cadillac: DTS (06-11)
- Pontiac: G5 (07-10), G6 (06-10), Grand Prix (06-08), Pursuit (06)
- Saturn: Aura (07-09), Ion (06-07), Vue (07-10)
- Hummer: H3 (08-10)
- Saab: 9-7X (06-09)
Frequently Asked Questions
What does ‘VIN Programmed’ mean for me?
It means this module is ready for installation right out of the box. We flash it with your vehicle’s specific Vehicle Identification Number (VIN) and the latest GM software before shipping. This ensures it communicates perfectly with your van’s engine computer and other systems, saving you a trip to the dealership for costly programming.
Do I need to send my old TCM back?
No, there is no core charge for this part. You can keep your old module or dispose of it, making the process hassle-free.
Will this fix a P0700 code on my Savana Van?
A P0700 is a general code indicating the TCM has detected a fault. While a failing TCM is a very common cause, this code can also be triggered by faulty wiring, bad solenoids, or mechanical issues. However, if you are also experiencing erratic shifting or other symptoms listed above, replacing the TCM is the most probable fix.
Is this an OEM part?
This is a high-quality replacement part built to meet or exceed original equipment manufacturer (OEM) specifications for performance and durability. It is a direct-fit replacement for part number 24235753 and many others.
What if I install it and still have problems?
Because our modules are pre-programmed and tested, installation problems are rare. If issues persist, it often points to an underlying problem the old TCM was flagging, such as a faulty shift solenoid inside the transmission or a damaged wiring harness. Our expert support team is here to help you diagnose the next steps.