Restore Peak Transmission Performance in Your GM Vehicle
Is your 2006-2014 Chevrolet Express 1500 or other GM vehicle suffering from erratic shifting, delayed gear engagement, or a frustrating “limp mode”? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the brain of your automatic transmission, responsible for orchestrating every shift with precision. When it fails, it can lead to poor performance, decreased fuel economy, and potentially catastrophic transmission damage. This OEM-quality T42 TCM, service part number 24235340, is the definitive solution to restore your vehicle’s drivability and reliability.
Diagnosing a Faulty T42 TCM
A failing TCM doesn’t just cause noticeable driving issues; it also communicates its failure through diagnostic trouble codes (DTCs). If your check engine light is on, a scan tool might reveal codes like P0700 (Transmission Control System Malfunction), P0750 (Shift Solenoid ‘A’ Malfunction), or other solenoid-specific codes. These codes point directly to a problem within the transmission’s control circuit, with the TCM often being the root cause. Ignoring these warnings can lead to more severe mechanical problems, making a timely replacement crucial.
From the Diagnostic Bay
We recently had a 2009 GMC Savana work van towed in. The owner reported it was stuck in third gear and the transmission temperature light was flickering. A quick scan showed a P0700 code and several intermittent solenoid circuit faults. Instead of jumping to a costly transmission rebuild, we inspected the TCM. After confirming the internal circuitry had failed, we installed one of our VIN-programmed T42 modules. In under 30 minutes, the van was shifting perfectly through all gears on the test drive. The customer was back on the road the same day, having avoided thousands in unnecessary repairs and dealership programming fees. This is the power of a pre-programmed, direct-fit solution.
Signs Your T42 TCM is Failing
- ✔️ Harsh & Erratic Shifting: Your vehicle may slam into gear, hesitate between shifts, or shift at incorrect RPMs.
- ✔️ Stuck in Gear / Limp Mode: The transmission may refuse to shift out of a single gear (often 2nd or 3rd) to protect itself from further damage.
- ✔️ Warning Lights: The Check Engine Light or a dedicated transmission warning light will illuminate on your dashboard.
- ✔️ Delayed Engagement: A noticeable delay when shifting from Park into Drive or Reverse.
- ✔️ Poor Fuel Economy: Inefficient shifting and torque converter lockup caused by the faulty module can lead to a significant drop in MPG.
- ✔️ No Communication: In severe cases, a scan tool may be unable to communicate with the TCM, indicating a complete failure.
Why Choose Our Programmed 2006-2014 Express 1500 Transmission Module?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. The single biggest hurdle when replacing a modern electronic module is programming. Our service eliminates this entirely. We pre-program each module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This process loads the latest GM software and calibrations, ensuring the TCM works seamlessly with your vehicle’s engine and other systems right out of the box. There is no need for an expensive trip to the dealership for programming.
Installation is Simple
For a 2006-2014 Express 1500, the TCM is typically located in the engine compartment on the right-hand side. The replacement process is straightforward for a DIY mechanic or any professional technician:
- Disconnect the Battery: Always disconnect the negative battery terminal before working on any electronic components.
- Locate and Remove the Old TCM: Unplug the electrical connectors and unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, VIN-programmed TCM in place and securely reconnect the electrical harnesses.
- Reconnect the Battery: Reattach the negative battery terminal.
- Clear Codes: Use a scan tool to clear any stored DTCs from the vehicle’s memory.
With no core charge, you can keep your old part without the hassle of returns. This module is built to strict OEM standards and is backed by a one-year warranty, giving you confidence and peace of mind in your repair.
This T42 TCM is a direct replacement for a wide array of GM part numbers, including 24252114, 24234503, 24230461, 24234274, and many more, making it a versatile fix for countless trucks, vans, and SUVs from Chevrolet, GMC, Buick, Cadillac, and more.
Frequently Asked Questions
What does a VIN-programmed TCM mean?
It means we flash the module with your vehicle’s specific software and calibration files using your VIN before we ship it. This makes the unit plug-and-play, allowing it to communicate correctly with your vehicle’s other computers without requiring any additional programming from a dealership.
Do I need to take my vehicle to the dealership after installation?
No. Because the module arrives pre-programmed to your VIN, you do not need to visit a dealer or specialized shop for software installation. This saves you time and significant expense.
Where is the TCM located on my 2008 Chevy Express 1500?
On most 2006-2014 Express and Savana vans, the Transmission Control Module is located in the engine compartment, typically mounted on the right-hand (passenger) side.
Will this module fix a P0700 trouble code?
A P0700 code indicates a general fault request from the TCM. While this module often resolves the underlying issue causing the P0700 (like internal circuit failure or solenoid faults), it’s essential to diagnose any other potential issues. However, a faulty TCM is the most common culprit.
Is there a core charge for this part?
No, there is no core charge. You are not required to send your old, failed module back to us, simplifying the repair process for you.