Restore Peak Performance to Your Workhorse Van
Is your 2006-2014 GMC Savana 1500 Van suffering from erratic shifting, getting stuck in gear, or throwing transmission codes? A faulty Transmission Control Module (TCM) is one of the most common culprits behind these frustrating and costly issues. As the electronic brain of your automatic transmission (like the 4L60E or 4L80E), the TCM dictates every shift point and manages torque converter lockup. When it fails, your van’s reliability is compromised, leading to downtime that no business can afford. This OEM-quality T42 TCM, part number 24256960, is the definitive, hassle-free solution to get your Savana back on the road and working as hard as you do.
Case Study: A Tricky Diagnosis
A local contractor brought his ’09 Savana 1500 into my shop, complaining of intermittent ‘limp mode.’ The van would get stuck in 3rd gear without warning, making it sluggish and unsafe. His scanner showed a generic P0700 code. After checking the wiring harness and solenoids, which all tested fine, we identified the root cause: the original TCM was failing internally due to heat cycles and vibration. We installed one of our VIN-programmed modules, and in under 30 minutes, the van was shifting perfectly. He avoided a costly dealership visit and, more importantly, got his work van back in service the same day. This is a classic failure I’ve seen hundreds of times on these GM work vehicles.
Is Your Savana Exhibiting These Transmission Problems?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement. A new Savana 1500 Van TCM is often the most direct path to a lasting repair.
- ✔ Harsh, slamming shifts or delayed gear engagement.
- ✔ Vehicle is stuck in one gear (often called “limp mode”).
- ✔ Check Engine Light is on with transmission-related Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0753, or other solenoid performance codes.
- ✔ The transmission refuses to upshift or downshift correctly.
- ✔ A noticeable drop in fuel economy.
- ✔ The ‘PRNDL’ display on your dash may be incorrect or not showing at all.
Get Your Van Back in Service: A 30-Minute Install Guide
One of the biggest benefits of this module is the simple, plug-and-play installation. Because we program it to your van’s VIN before shipping, you can skip the expensive trip to the dealership for programming. Here’s a general guide for a DIY replacement:
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the Module: On the GMC Savana and Chevrolet Express vans, the TCM is typically mounted in the engine compartment on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unclip the electrical connectors from the old TCM. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount your new, pre-programmed TCM onto the bracket and securely reconnect the electrical connectors. You should hear a ‘click’ as they lock into place.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s always best practice to use a basic OBD2 scan tool to clear any stored fault codes from the vehicle’s memory. Start the engine and take it for a test drive to confirm smooth shifting.
Verified Fitment for Your GM Vehicle
This T42 TCM is a direct replacement for a wide range of General Motors vehicles equipped with 4-speed automatic transmissions. It is interchangeable with numerous part numbers, including 24252114, 24234503, 24230461, 24234274, 24255280, 24256960, and more. While this page is focused on the Savana 1500 Van TCM, this part also fits:
- Chevrolet: Silverado, Tahoe, Suburban, Express Van, Impala, Cobalt, HHR
- GMC: Sierra, Yukon, Savana Van, Envoy, Canyon
- Buick: LaCrosse, Lucerne, Rainier
- Cadillac: DTS
- Pontiac: G6, Grand Prix
- Hummer: H3
- And many more. Please verify your specific model in the fitment chart or contact us with your VIN.
Frequently Asked Questions
Do I need to have this TCM programmed by a dealer?
No. We handle all the programming for you. Simply provide your vehicle’s VIN during checkout, and the module will arrive ready for immediate installation, saving you hundreds of dollars in dealership fees.
Is there a core charge for my old part?
Absolutely not. You can keep your old module or recycle it at your convenience. We don’t require a core return, which simplifies the process for you.
What tools are required for installation?
Installation is very straightforward. You’ll typically only need basic hand tools, such as a socket set to remove the mounting bolts and potentially a small flathead screwdriver to help release the connector clips. No special electronic tools are needed.
Will this fix a P0700 trouble code?
A P0700 code is a general code indicating the TCM has detected a fault. In many cases where the TCM itself is the source of the problem, replacing it with this programmed unit will resolve the P0700 and any related specific codes.
What kind of warranty is included?
This module is backed by our one-year, hassle-free warranty. We stand by the quality and reliability of our parts to give you complete peace of mind with your purchase.