Get Your Work Van Back on the Road with a Reliable Transmission Fix
If your 2006-2014 Chevrolet Express 2500 Van is suffering from harsh shifting, getting stuck in gear, or throwing transmission codes, a failing Transmission Control Module (TCM) is the likely culprit. As a mechanic with over two decades of experience, I’ve seen firsthand how a faulty TCM can bring a dependable workhorse to a standstill. This isn’t just an inconvenience; it’s lost time and money. This T42 TCM, part number 24240449, is the definitive solution to restore your van’s transmission performance and reliability.
The core of the problem with these modules often lies in internal circuit board failures from years of heat cycles and vibration. This replacement is engineered to meet or exceed original equipment standards, providing a durable, long-term fix. The most significant benefit? It arrives at your door pre-programmed to your van’s specific Vehicle Identification Number (VIN). This eliminates the need for expensive dealership programming or specialized scan tools, making it a true plug-and-play repair for both professional technicians and savvy DIYers.
Case Study: A Tricky Diagnosis
A local delivery business brought in their ’11 Express 2500. The driver reported intermittent, violent 1-2 shifts and occasionally getting stuck in 3rd gear (limp mode), but only after the van was fully warmed up. We scanned it and found a generic P0700 code. After checking the fluid and solenoids, which were fine, we suspected the TCM. The intermittent nature of the fault was classic heat-related failure on the module’s circuit board. We installed one of our VIN-programmed T42 modules, and the van was back in service the same afternoon, shifting perfectly. The owner was thrilled to avoid a costly, multi-day stay at the dealership.
Is Your Van’s Transmission Acting Up?
A failing TCM can manifest in several ways. If you’re experiencing any of the following, it’s time to consider a replacement Express 2500 Van TCM:
- ✔ Harsh, erratic, or delayed gear shifts that slam into gear.
- ✔ The vehicle is stuck in “limp mode,” usually second or third gear, with no upshifting or downshifting.
- ✔ An illuminated Check Engine Light or Transmission Warning Light with Diagnostic Trouble Codes (DTCs) like P0700, P0750, P0753, or other solenoid-related faults.
- ✔ A sudden drop in fuel economy as the transmission operates inefficiently.
- ✔ Complete loss of communication with the module, leading to a no-start or no-shift condition.
Your 30-Minute Path to a Smooth-Shifting Van
Installation is straightforward and designed to be completed with basic hand tools. For the Chevrolet Express and GMC Savana vans, the process is especially simple.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and help reset the system.
- Locate the TCM: On your 2006-2014 Express 2500 Van, the TCM is typically found in the engine compartment, mounted on the right-hand (passenger) side.
- Disconnect and Remove: Carefully unplug the electrical connectors. Use a small screwdriver to gently release the locking tabs if necessary. 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 harnesses. You should hear a click as they lock in.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, 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 take a test drive to confirm smooth shifting.
Confirmed Vehicle Compatibility List
This T42 TCM is a direct replacement for part number 24240449 and other service numbers. While it is guaranteed to fit your Express 2500 Van TCM application, it also fits a wide range of other GM vehicles. Please verify your specific model and year below.
Fits Chevrolet:
Express 1500/2500/3500 Van (2006-2014), Silverado 1500/2500 (2007-2013), Tahoe (2007-2009), Suburban 1500 (2007-2008), Avalanche 1500 (2007-2008), Impala (2006-2011), Monte Carlo (2006-2007), Cobalt (2006-2010), HHR (2006-2011), Colorado (2008-2012), SSR (2005-2006)
Fits GMC:
Savana 1500/2500/3500 Van (2006-2014), Sierra 1500/2500 (2007-2013), Yukon & Yukon XL 1500 (2007-2009), Envoy & Envoy XL (2006-2009), Canyon (2008-2012)
Fits Buick, Cadillac, Pontiac, Saturn, Hummer, Saab:
LaCrosse (2006-2009), Lucerne (2006-2011), Allure (2006-2009), Rainier (2006-2007), Rendezvous (2006-2007), DTS (2006-2011), G5 (2007-2010), G6 (2006-2010), Grand Prix (2006-2008), Pursuit (2006), Vue (2007-2010), Aura (2007-2009), Ion (2006-2007), Montana (2006-2009), Terraza (2006-2007), Uplander (2006-2009), Hummer H3 (2008-2010), Saab 9-7X (2006-2009)
Frequently Asked Questions
Do I need to take my van to the dealer after installing this?
No. This module is fully pre-programmed to your vehicle’s VIN before shipping. It is a plug-and-play solution that does not require any additional programming or trips to the dealership, saving you time and money.
Is this part number 24240449 the same as other service numbers?
Yes, this module is a direct replacement for multiple GM part numbers, including 24240449, 24252114, 24234503, 24242391, and others listed in the description. It is designed to function identically to the original part.
What tools do I need for installation?
You’ll only need basic hand tools, such as a socket set to remove the mounting bolts and a flathead screwdriver to help with the connector clips. A basic OBD2 scanner is also recommended to clear any old codes after installation.
What is a core charge? Do I need to send my old part back?
There is no core charge for this part. You can keep your old module or dispose of it yourself, making the process hassle-free.
What kind of warranty is included?
This Transmission Control Module comes with a one-year warranty, giving you peace of mind that you’re installing a quality, reliable part in your vehicle.