Is Your GMC Savana 2500 Shifting Erratically?
If your 2006-2014 GMC Savana 2500 is experiencing harsh shifts, delayed gear engagement, or is stuck in limp mode, a failing Transmission Control Module (TCM) is the most likely culprit. As the electronic brain of your automatic transmission, the TCM is responsible for every gear change and torque converter operation. When it fails, it can mimic severe mechanical problems, leading to incorrect diagnoses and costly, unnecessary repairs. This genuine quality T42 TCM, part number 24235753, is the definitive solution to restore your van’s performance and reliability.
From the Diagnostic Bay
We recently had a 2011 Savana 2500 from a local contractor limp into the shop. The driver was frustrated with the van getting stuck in 3rd gear, which was crippling his ability to get to job sites on time. The dashboard was lit up with a check engine light and a transmission warning. A quick scan pulled a P0700 code along with several solenoid circuit faults. While this might suggest a full transmission rebuild to some, our experience pointed directly to the TCM. We installed this exact VIN-programmed T42 module. In less than 30 minutes, all codes were cleared, and the van was shifting as smoothly as the day it left the factory. It’s a prime example of how the right electronic part can save thousands in mechanical repairs.
Diagnosing a Faulty Savana 2500 Transmission Module
A failing TCM can manifest in various ways, often becoming worse over time. If you’re noticing any of the following issues with your Savana, it’s time to consider a replacement module. Ignoring these symptoms can lead to further damage to your transmission’s internal components.
- ✔ Harsh or Erratic Shifting: Experiencing abrupt, jerky shifts between gears or a noticeable delay when shifting from park to drive or reverse.
- ✔ Stuck in Gear: The transmission refuses to shift out of a certain gear, often referred to as “limp mode,” to prevent further damage.
- ✔ Warning Lights: The Check Engine Light or a specific transmission warning light is illuminated on your dashboard.
- ✔ Diagnostic Trouble Codes (DTCs): Common codes associated with TCM failure include P0700 (Transmission Control System Malfunction) and various solenoid-specific codes (e.g., P0751, P0756).
- ✔ Poor Fuel Economy: Inefficient shifting and torque converter lockup caused by a bad module can lead to a sudden drop in gas mileage.
- ✔ No Communication: In severe cases, a scan tool may be unable to communicate with the TCM, indicating a complete failure of the unit.
The Plug-and-Play Solution
The primary benefit of this module is the professional VIN programming. We flash the unit with your vehicle’s specific Vehicle Identification Number and the latest GM software updates before it ships. This critical step ensures that the module communicates flawlessly with your van’s engine computer and other systems right out of the box. You can avoid the expensive and time-consuming trip to a dealership for programming. Simply install the part, and you’re ready to go.
Built to meet or exceed original equipment specifications, this module ensures long-term durability and performance. It directly replaces a wide range of part numbers, including 24242391, 24234503, 24252114, and more, making it a versatile fix for many GM vehicles from this era.
Frequently Asked Questions
What does this Transmission Control Module do?
The TCM acts as the central computer for your automatic transmission. It receives data from various sensors on the engine and transmission to control shift points, line pressure, and torque converter lockup, ensuring smooth and efficient operation.
Is this part difficult to install on my Savana 2500?
Installation is straightforward for a DIY mechanic with basic tools. On the Savana 2500, the TCM is typically located in the right-hand (passenger side) of the engine compartment. The process involves disconnecting the battery, unplugging the electrical connectors, unbolting the old module, and installing the new one. The entire job usually takes less than 30 minutes.
Why is VIN programming so important?
VIN programming loads your vehicle’s specific software and calibrations onto the module. Without it, the TCM won’t recognize your vehicle’s configuration, leading to continued shifting problems or a no-start condition. Our pre-programming service saves you a trip to the dealer and ensures a true plug-and-play installation.
Will this fix a P0700 diagnostic trouble code?
A P0700 code is a general fault code indicating that the TCM has detected a problem and has requested the check engine light to be turned on. While this module often resolves the root cause of a P0700 code (like internal solenoid circuit faults), it’s essential to have the specific secondary codes read to confirm the diagnosis.
Do I need to send my old part back (core charge)?
No, there is no core charge for this part. You can keep your old module without any extra hassle or fees.