Tired of Erratic Shifting and Transmission Warning Lights?
Get your GMC Savana 2500 back to work with a transmission that shifts like new. If you’re experiencing harsh gear changes, delayed engagement, or your van is stuck in limp mode, a faulty Transmission Control Module (TCM) is the most likely culprit. This isn’t just an annoyance—it’s a reliability issue that can leave you stranded. Our pre-programmed T42 TCM is the definitive, hassle-free solution to restore your vehicle’s performance and your peace of mind.
Common Symptoms & Your Solution
A failing TCM can cause a cascade of frustrating and potentially damaging issues. Recognizing the signs is the first step to a successful repair. If your vehicle is showing any of these symptoms, this module is designed to be the fix:
- Harsh or Slipping Shifts: Abrupt, jerky gear changes or a feeling that the transmission is slipping between gears.
- Limp Mode Activation: The vehicle is stuck in a single gear (usually 2nd or 3rd) to prevent further damage.
- Warning Lights: The Check Engine Light or a specific transmission warning light is illuminated on your dash.
- Diagnostic Trouble Codes (DTCs): You’ve pulled codes like P0700 (Transmission Control System Malfunction), P0750-P0758 (Shift Solenoid Errors), or other transmission-related faults.
- No Shifting: The transmission refuses to upshift or downshift as you accelerate or decelerate.
This VIN programmed T42 TCM directly addresses these problems by replacing the faulty electronic brain of your transmission with a reliable, perfectly configured unit. We handle the programming, so you can handle the simple installation.
Features That Deliver Real-World Benefits
- ✔ Plug-and-Play Installation: This module arrives pre-programmed to your vehicle’s specific VIN. This eliminates the need for expensive trips to the dealership for programming or special scan tools. Just install it, and you’re ready to go.
- ✔ Restored Drivability: By precisely controlling shift points, torque converter lockup, and line pressure, this TCM ensures smooth, efficient, and predictable gear changes, just like the factory intended.
- ✔ Solve Pesky Check Engine Lights: A new, correctly functioning TCM is the key to clearing persistent transmission-related DTCs and finally turning off that warning light for good.
- ✔ OEM-Standard Quality: Built to meet or exceed original equipment specifications, ensuring long-lasting durability and performance whether you’re hauling cargo in a Savana or commuting in a Tahoe.
- ✔ Broad Compatibility: An exact replacement for a wide range of GM vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. Cross-references with numerous part numbers including 24252114, 24234503, and 24256960.
- ✔ No Core Charge: Keep your old part without any extra fees or the hassle of returning a core.
- ✔ This unit is backed by our one-year replacement warranty.
From the Expert’s Bench: The Critical Role of VIN Programming
We often see customers who tried a generic, non-programmed module from a junkyard or big box store, only to have the same shifting problems persist. Here’s why: your vehicle’s transmission strategy is unique. The software loaded onto the TCM is tailored to your specific engine, axle ratio, and tire size. Our VIN programming process ensures the VIN programmed T42 TCM you receive has the latest GM software updates specific to your exact vehicle. This isn’t just about compatibility; it’s about restoring the precise, factory-intended performance and preventing future issues.
Frequently Asked Questions
Do I need to get this module programmed by a dealer?
No. This is the primary benefit of our service. We pre-program the module to your vehicle’s VIN before shipping it. It will arrive ready for a plug-and-play installation, with no additional programming required.
How difficult is the installation?
Installation is straightforward for a DIYer with basic tools. The TCM is typically located in the engine bay and can be replaced in under 30 minutes. Always disconnect the vehicle’s battery before starting the repair to ensure the system resets properly.
Is there a core charge for my old part?
No, there is absolutely no core charge. You can keep, recycle, or dispose of your old module without any obligation to return it to us.
Will this fix a P0700 diagnostic code?
A P0700 code is a general fault code indicating the TCM has detected a problem. While this module often resolves the root cause that triggers a P0700, it’s essential to check for other specific codes (like solenoid or sensor codes) to confirm the TCM is the issue. In most cases of electronic failure, replacing the TCM is the correct solution.
How do I provide my VIN?
You will be prompted to enter your vehicle’s 17-digit VIN during the checkout process. Please double-check it for accuracy, as this is critical for correct programming.