Restore Peak Transmission Performance to Your GM Vehicle
Is your 2006-2014 Chevrolet Express 1500 experiencing erratic shifting, getting stuck in gear, or showing a check engine light with transmission codes? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for orchestrating smooth gear changes, managing torque converter lockup, and ensuring overall drivetrain efficiency. When it fails, it can lead to frustrating and potentially damaging driving conditions. This genuine OEM-quality T42 TCM, service part number 24235732, is the definitive solution to restore your vehicle’s factory performance and reliability.
Unlike generic modules that require expensive trips to the dealership for programming, this unit arrives at your door pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures seamless communication with your van’s other computers, like the Engine Control Module (ECM), for flawless, plug-and-play installation. Simply provide your VIN at checkout, and our technicians will flash the module with the latest GM software updates, guaranteeing optimal shift points, fuel economy, and electronic handshake from the moment you install it.
From the Diagnostic Bay
We recently had a 2011 Savana work van come into the shop with a classic P0700 code and a complaint of harsh 1-2 shifts. The owner had already replaced two shift solenoids based on a forum suggestion, but the problem persisted. After a quick scan, we saw erratic data from the TCM. Instead of continuing to throw parts at it, we installed one of our VIN-programmed T42 modules. The installation took less than 20 minutes. After clearing the codes, the van shifted perfectly on the test drive. The customer was thrilled to have his reliable workhorse back on the road without wasting any more time or money on incorrect diagnoses.
Is Your Express 1500 TCM Failing?
A faulty transmission control module can manifest in various ways, often mimicking mechanical transmission problems. Before considering a costly transmission rebuild, check for these common electronic symptoms:
- ✔ Harsh or Delayed Shifting: Experiencing sudden, jerky gear changes or a noticeable lag when the transmission shifts.
- ✔ Stuck in Limp Mode: The vehicle refuses to shift out of a single gear (often 2nd or 3rd) to protect the transmission from further damage.
- ✔ Warning Lights: The Check Engine Light or a dedicated transmission warning light is illuminated on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): Common codes include P0700 (Transmission Control System Malfunction) and various solenoid-specific codes (e.g., P0751, P0756).
- ✔ No Upshift or Downshift: The transmission fails to shift into higher gears as you accelerate or downshift as you slow down.
- ✔ Poor Fuel Economy: Inefficient shifting and torque converter lockup can cause a sudden drop in your vehicle’s MPG.
- ✔ Complete Communication Loss: In severe cases, the TCM may fail entirely, preventing the vehicle from starting or moving.
The Direct-Fit Solution: A Programmed 2006-2014 Express 1500 TCM
This module is engineered to meet and exceed original equipment specifications. It serves as a direct replacement for a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. The VIN programming not only saves you hundreds in dealership fees but also ensures that all vehicle-specific calibrations are correctly loaded, resolving software-related issues that a generic part cannot fix. Installation is straightforward for a DIY mechanic or any professional technician. Located in the engine bay, it’s typically accessible and can be swapped out in under 30 minutes. No core charge means you can complete the repair without the hassle of returning your old, faulty part.
Extensive Compatibility
This T42 TCM is a direct replacement for numerous part numbers, including 24242391, 24234503, 24252114, and many more. It fits a vast array of GM models beyond the Express van, such as the Chevrolet Silverado, Tahoe, Impala; GMC Sierra, Yukon, Savana; Buick LaCrosse; Cadillac DTS; and Hummer H3. Please verify your vehicle in the fitment chart below to ensure perfect compatibility.
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
No. This Transmission Control Module is delivered to you fully pre-programmed to your vehicle’s VIN. This makes it a true plug-and-play solution, eliminating the need for any additional programming or calibration at a dealership.
Where is the TCM located on my 2009 Express 1500?
On most 2006-2014 Express and Savana vans, the TCM is located in the engine compartment on the right-hand (passenger) side. Always disconnect the vehicle’s battery before starting the replacement process.
Will this fix a P0700 trouble code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While a failing TCM is a very common cause, this code can also be triggered by other transmission issues. However, if you are experiencing other symptoms like erratic shifting along with the P0700 code, replacing the TCM is the most likely solution.
Is there a core charge for this part?
No, there is no core charge. You are not required to send your old, non-working module back to us, which simplifies the repair process for you.
What is the warranty on this TCM?
This module is backed by our standard one-year warranty, covering any defects in materials or workmanship for your peace of mind.