Restore Your Van’s Shifting Performance
If your 2006-2014 GMC Savana 1500 Van is suffering from erratic shifting, getting stuck in gear, or has an illuminated check engine light, a failing Transmission Control Module (TCM) is the most likely culprit. As a mechanic with over two decades of experience, I’ve seen how a faulty TCM can sideline a reliable workhorse. This isn’t just an inconvenience; it’s a critical failure that affects your van’s performance and safety. This replacement T42 TCM, part number 24235732, is the definitive solution to restore the crisp, predictable shifting your vehicle had from the factory.
The core of the problem often lies in the original module’s inability to properly interpret sensor data and command the transmission’s solenoids. This leads to the harsh bangs, delayed gear engagement, and poor fuel economy you’re likely experiencing. Our solution is a high-quality replacement 2006-2014 Savana 1500 Van TCM that arrives at your door pre-programmed to your specific Vehicle Identification Number (VIN). This crucial step ensures it communicates flawlessly with your van’s powertrain, eliminating the need for an expensive trip to the dealership for programming.
From the Diagnostic Bay: The Case of the Hesitant Work Van
A local contractor brought in his Savana 1500, complaining of intermittent ‘limp mode’ and a hard 1-2 shift that would shake the whole van. His scanner showed a generic P0700 transmission fault code. After checking the fluid and wiring, we focused on the TCM. These modules, especially on hardworking vans, are subjected to constant heat cycles in the engine bay. Over time, internal solder joints can crack, causing unpredictable electrical connections. We swapped in a VIN-programmed TCM, and the difference was immediate. The shifts were smooth, the code was gone, and the van was back on the job site the same day. This isn’t just a part replacement; it’s a restoration of reliability.
Is Your Savana Van Showing These Telltale Signs?
- ✔ Harsh, slamming, or delayed gear shifts.
- ✔ The vehicle is stuck in a single gear (often called ‘limp mode’).
- ✔ Check Engine Light or Transmission Warning Light is on.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750-P0758 (solenoid circuit faults), or other transmission-related codes.
- ✔ Failure to upshift or downshift correctly.
- ✔ A noticeable drop in fuel efficiency.
- ✔ Complete loss of communication with the transmission module.
A Straightforward Guide to TCM Installation
Getting your van back in top shape is easier than you think. This installation can typically be completed in under 30 minutes with basic hand tools. For the GMC Savana and Chevrolet Express vans, the TCM is conveniently located in the engine compartment on the right-hand (passenger) side.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the onboard systems.
- Locate the Module: Open the hood and find the TCM on the passenger side of the engine bay. It’s a silver box with two large electrical connectors.
- Disconnect and Remove: Carefully unclip and remove the two wiring harness connectors. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount the new, VIN-programmed TCM onto the bracket and securely fasten the bolts. Re-attach the two wiring harness connectors, ensuring they click into place.
- Final Steps: Reconnect the negative battery terminal. While the system may reset, it’s best practice to use a basic OBD2 scan tool to clear any stored fault codes from the vehicle’s memory. Start the engine and test drive to confirm smooth operation.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. It is interchangeable with part numbers 24252114, 24234503, 24230461, 24234274, 24235732, and others. While this page focuses on the 2006-2014 Savana 1500 Van TCM, it also fits the following models:
- Chevrolet: Avalanche (07-08), Cobalt (06-10), Colorado (08-12), Express 1500/2500/3500 (06-14), HHR (06-11), Impala (06-11), Monte Carlo (06-07), Silverado 1500/2500 (07-13), SSR (05-06), Tahoe (07-09), Trailblazer (06-09), Uplander (06-09)
- GMC: Canyon (08-12), Envoy (06-09), Savana 1500/2500/3500 (06-14), Sierra 1500/2500 (07-13), Yukon / Yukon XL (07-09)
- Buick: Allure (06-09), LaCrosse (06-09), Lucerne (06-11), Rainier (06-07), Rendezvous (06-07), Terraza (06-07)
- Cadillac: DTS (06-11)
- Pontiac: G5 (07-10), G6 (06-10), Grand Prix (06-08), Pursuit (06), Montana (06-09)
- Saturn: Aura (07-09), Ion (06-07), Vue (07-10)
- Hummer: H3 (08-10)
- Saab: 9-7X (06-09)
Frequently Asked Questions
What is VIN programming and why is it important?
VIN programming means we load your vehicle’s specific identification number and the latest GM software onto the module before shipping. This ensures it works perfectly with your van’s engine and transmission settings right out of the box, avoiding a costly and time-consuming programming session at a dealership.
Do I need to return my old TCM? Is there a core charge?
No, there is no core charge for this part. You can keep your old module or dispose of it, making the process simple and hassle-free.
Is this a difficult part for a DIYer to install?
Not at all. For the Savana van, the TCM is easily accessible in the engine bay. With basic tools and our step-by-step guide, most people can complete the replacement in under 30 minutes. It’s one of the most straightforward electronic component replacements you can do.
What warranty is included with this part?
This Transmission Control Module comes with a one-year warranty, giving you peace of mind and confidence in your repair.