Restore Your Minivan’s Performance and Reliability
If your 2006-2009 Chevrolet Uplander is suffering from erratic shifting, getting stuck in gear, or has the check engine light on with transmission codes, you’re likely dealing with a failed Transmission Control Module (TCM). This isn’t just an annoyance; it’s a critical failure that can affect your family’s safety and leave you stranded. This VIN-programmed T42 TCM, part number 24243921, is the definitive solution to restore your van’s transmission to its original, smooth-operating condition without a costly trip to the dealership.
Case Study: A Tricky Diagnosis
A customer brought in their 2008 Uplander with a classic complaint: it would randomly refuse to shift out of 2nd gear, especially after warming up. They had already replaced two shift solenoids based on a generic P0750-series code, but the problem persisted. In my shop, I’ve seen this exact scenario dozens of times. The root cause wasn’t the solenoids themselves, but the TCM failing to properly command them. We installed one of our VIN-programmed T42 modules, cleared the codes, and the van was shifting perfectly within an hour. This part saves you from chasing phantom issues and fixes the problem at its source.
Is Your Uplander Showing These Transmission Warning Signs?
- ✔️ Harsh, delayed, or slamming shifts between gears.
- ✔️ Vehicle is stuck in “limp mode” and won’t shift past 2nd or 3rd gear.
- ✔️ Check Engine Light or Transmission Warning Light is illuminated.
- ✔️ Diagnostic Trouble Codes (DTCs) are present, such as the general P0700 or specific solenoid codes (e.g., P0751, P0756).
- ✔️ A noticeable drop in fuel economy or a transmission overheating warning.
- ✔️ Complete loss of communication with the transmission module.
The Permanent Fix: A Pre-Programmed 2006-2009 Uplander TCM
The main reason mechanics and DIYers choose this module is the plug-and-play convenience. We handle the complex part for you. By programming the module to your Uplander’s specific Vehicle Identification Number (VIN) before shipping, we ensure it communicates flawlessly with your vehicle’s Powertrain Control Module (PCM) and other systems right out of the box. This eliminates the need for expensive dealer-only programming tools, saving you time and hundreds of dollars in labor and service fees.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts and reset the system.
- ✔ Locate the Module: On the 2006-2009 Uplander, the TCM is typically found mounted to the driver’s side (LH) strut tower in the engine bay. It’s a silver box with electrical connectors.
- ✔ Disconnect and Remove: Carefully unplug the electrical harnesses. Then, unbolt the module from its mounting bracket. Keep track of the hardware.
- ✔ Install the New TCM: Mount the new module securely onto the bracket and firmly reconnect the electrical harnesses until they click into place.
- ✔ Final Steps: Reconnect the battery terminal. While the system may reset itself, it’s best practice to use a basic OBD2 scan tool to clear any stored transmission codes to ensure a clean slate.
Verified Vehicle Compatibility
While this module is a perfect fit for the 2006-2009 Chevrolet Uplander, it is also compatible with a wide range of other GM vehicles. Please confirm your specific model and year below. This part is a direct replacement for service numbers 24243921, 24234503, 24252114, and others.
Partial Fitment List:
UPLANDER 06-09 Transmission; (LH strut tower)
MONTANA 06-09 Transmission; (LH strut tower)
TERRAZA 06-07 Transmission; (LH strut tower)
COBALT 06-10 Transmission; (LH strut tower)
G5 07-10 Transmission; (LH strut tower)
G6 06-10 Transmission; (LH strut tower)
HHR 06-11 Transmission; (LH engine compartment)
IMPALA 06-11 Transmission; (lower air cleaner housing)
…and many more GM models.
Frequently Asked Questions
Do I need to take this part to a dealer for programming?
No. This Transmission Control Module is delivered to you pre-programmed to your vehicle’s VIN. It is ready for immediate installation and requires no further programming.
Where is the TCM located on my 2007 Uplander?
On the 2006-2009 Uplander, the TCM is located in the engine compartment, bolted to the driver’s side (LH) strut tower.
Will this fix a P0700 trouble code?
A P0700 code is a general fault request from the TCM. While this module often resolves the underlying issue causing the P0700 (like a failed solenoid driver), you should scan for more specific codes (P07xx) to confirm the diagnosis. A faulty TCM is a very common cause.
Is this a difficult part for a DIYer to replace?
Not at all. With basic hand tools and our guide, most people can replace this module in under 30 minutes. The location on the strut tower makes it easily accessible.
What is the warranty on this module?
This module comes with a one-year warranty, giving you confidence and peace of mind in your repair.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old part or dispose of it without the hassle of returning it.