Restore Your Uplander’s Transmission Performance
Is your 2006-2009 Chevrolet Uplander suffering from erratic shifting, getting stuck in gear, or displaying a check engine light? These are classic signs of a failing Transmission Control Module (TCM). The TCM is the electronic brain of your automatic transmission, responsible for managing gear changes, torque converter clutch engagement, and fluid pressure. When it fails, it can lead to poor performance, decreased fuel economy, and potential damage to your transmission. This OEM-quality T42 TCM, part number 24240400, is the definitive solution to restore your vehicle’s drivability and reliability.
From the Diagnostic Bay
We had a 2008 Uplander come into the shop that was stuck in what the owner called “limp mode”—it wouldn’t shift out of 3rd gear. The dashboard was lit up with a check engine light and a transmission warning. A quick scan showed a P0700 (Transmission Control System Malfunction) code. After confirming the wiring harness was intact, we identified a faulty internal circuit in the original TCM. We installed one of our pre-programmed T42 modules. After a 25-minute installation and clearing the codes, the van shifted perfectly on the test drive. The customer was back on the road the same afternoon, avoiding a costly trip to the dealership.
Identifying a Faulty 2006-2009 Uplander TCM
A failing TCM can manifest in several ways, often starting as intermittent issues before becoming a constant problem. Being aware of the symptoms can help you diagnose the issue correctly and prevent further transmission wear. This module is the correct fix for these common problems.
Common Symptoms of TCM Failure
- ✔ Harsh or delayed gear engagement, causing the vehicle to jerk.
- ✔ Inability to shift up or down, or getting stuck in a single gear (limp mode).
- ✔ Illumination of the Check Engine Light or Transmission Warning Light.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults.
- ✔ A noticeable decrease in fuel efficiency.
- ✔ Inaccurate gear display on the instrument cluster.
- ✔ Complete loss of communication with the transmission, leading to a no-start or no-move condition.
The Plug-and-Play Solution
The biggest hurdle in replacing modern electronic modules is the need for expensive dealership programming. We eliminate that step entirely. Each module is expertly programmed to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This ensures that it communicates flawlessly with your Uplander’s Engine Control Unit (ECU) and other systems right out of the box. Simply install the module, connect the wiring, and you’re ready to go. This process ensures optimal shift points, torque converter strategy, and overall transmission health based on the latest GM software updates.
Installation and Compatibility
For the 2006-2009 Chevrolet Uplander, the TCM is conveniently located at the driver’s side strut tower in the engine compartment, making for a straightforward replacement. The entire process typically takes less than 30 minutes. This module is a direct replacement for a wide range of GM part numbers, including 24252114, 24234503, 24230461, and 24240400. With no core charge, you can complete your repair without the hassle of returning the old part.
Frequently Asked Questions
Does this 2006-2009 Uplander TCM require programming?
No. This module comes pre-programmed to your vehicle’s VIN. Simply provide your VIN at checkout, and the unit will arrive ready for a plug-and-play installation, with no need for a trip to the dealership.
Where is the TCM located on my Chevrolet Uplander?
On the 2006-2009 Uplander, the Transmission Control Module is typically found in the engine bay, mounted to the driver’s side (LH) strut tower.
What happens if I don’t replace a failing TCM?
Continuing to drive with a faulty TCM can lead to severe and costly damage to your transmission’s internal components, such as clutches and bands, due to incorrect fluid pressure and harsh shifting. It can also leave you stranded if the vehicle enters a permanent limp mode or fails to engage a gear.
Is this a genuine GM part?
This is an OEM-quality part built to meet or exceed original manufacturer specifications for performance and durability. It provides a reliable and cost-effective alternative to a dealership part.
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 for this code, it’s important to have the vehicle scanned for more specific transmission codes (e.g., P07xx series) to confirm the diagnosis. In many cases, replacing the TCM will resolve the root cause of the P0700 code.