Restore Smooth Shifting to Your GMC Savana Van
If your 2006-2014 GMC Savana 1500 is suffering from delayed shifts, getting stuck in gear, or throwing transmission codes, a failing Transmission Control Module (TCM) is the most likely culprit. As the electronic brain of your automatic transmission (like the 4L60E or 4L80E), the T42 TCM is responsible for every gear change. When it fails, it can cripple your work van’s performance and reliability. This replacement TCM, part number 24241806, is the definitive solution, arriving pre-programmed to your van’s specific VIN for a true plug-and-play repair that gets you back on the road without a trip to the dealership.
Case Study: A Tricky Diagnosis
I remember a 2011 Savana 1500 that came into my shop. The owner, a local plumber, was frustrated. His van would occasionally refuse to shift out of 2nd gear, especially after it warmed up. He had a P0700 (Transmission Control System Malfunction) code, but no specific solenoid codes. After checking the wiring harness and fluid levels, we suspected the TCM. The intermittent nature of the problem pointed to heat-related failure inside the module—a common issue I’ve seen in hundreds of these T42 units. We installed one of our VIN-programmed modules, and the problem was solved instantly. He was back to his service calls the same afternoon, saving a full day of lost work.
Is Your Savana Van Showing These Warning Signs?
A faulty TCM can manifest in several ways. If you’re experiencing any of the following, it’s time to consider a replacement 2006-2014 Savana 1500 TCM to prevent further transmission damage.
- ✔ Harsh, slamming gear changes or erratic shifting patterns.
- ✔ The vehicle is stuck in “limp mode,” often in 2nd or 3rd gear.
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, P0753, or other solenoid-related faults.
- ✔ Delayed engagement when shifting from Park to Drive or Reverse.
- ✔ Poor fuel economy and a feeling of lost power.
A Straightforward Guide to Installation
One of the best features of this module is its simple installation. You don’t need to be a master mechanic to get this job done in your own driveway in under 30 minutes.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the TCM: On the Savana and Express vans, 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.
- Final Steps: Reconnect the battery terminal. The system will recognize the new module. While not always necessary, using a basic OBD2 scan tool to clear any stored fault codes is good practice.
Verified Vehicle Compatibility
This T42 TCM is a direct fit for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions. While this page is focused on the 2006-2014 Savana 1500 TCM, it is also compatible with the following models. Please verify the location described for your specific vehicle.
- ✔ GMC: Savana 1500/2500/3500 Van, Sierra 1500/2500, Yukon, Yukon XL, Envoy, Canyon
- ✔ Chevrolet: Express 1500/2500/3500 Van, Silverado 1500/2500, Tahoe, Suburban, Avalanche, Impala, Monte Carlo, Cobalt, HHR, Colorado, SSR
- ✔ Cadillac: DTS
- ✔ Buick: LaCrosse, Lucerne, Allure, Rainier, Rendezvous
- ✔ Pontiac: G5, G6, Grand Prix, Pursuit
- ✔ Saturn: Vue, Aura, Ion
- ✔ Hummer: H3
- ✔ Saab: 9-7X
This part is interchangeable with service numbers: 24252114, 24234503, 24230461, 24234274, 24235340, 24235754, 24238856, 24239224, 24239926, 24240400, 24241806, and more.
Frequently Asked Questions
What does “VIN Programmed” mean for me?
It means we flash the module with your vehicle’s unique Vehicle Identification Number (VIN) and the latest GM software before we ship it. This ensures it communicates perfectly with your van’s engine and other systems right out of the box, eliminating the need for expensive programming at a dealership.
Do I need any special tools for this job?
No special tools are required. Basic hand tools, such as a socket set to remove the mounting bolts and disconnect the battery, are all you need for a successful installation.
Is there a core charge?
No, there is no core charge. You are not required to send your old, faulty module back to us, which saves you time and shipping costs.
Will this fix a P0700 code on my 2006-2014 Savana 1500 TCM?
A P0700 code is a general fault code indicating the TCM has detected a problem. In many cases, a failing TCM is the root cause. Replacing it with our programmed module is a very common and effective fix for this code and the related shifting symptoms.
What is the warranty on this part?
This transmission control module comes with a one-year warranty, giving you confidence and peace of mind in your repair.