End Frustrating Shifting Problems in Your Chevy Uplander
As a mechanic with two decades of experience, I’ve seen countless family vehicles like the Chevy Uplander sidelined by transmission issues. The symptoms are always stressful: sudden harsh shifts, getting stuck in a single gear, or a check engine light that just won’t go away. More often than not, the culprit isn’t the entire transmission—it’s a faulty Transmission Control Module (TCM). This VIN-programmed T42 TCM is the direct, reliable solution for your 2006-2009 Uplander TCM, designed to restore your minivan’s performance and your peace of mind.
This isn’t just a replacement part; it’s a complete fix. The original TCMs are known to fail from heat cycles and electrical stress, leading to the communication errors and solenoid faults that cause erratic behavior. We solve this by providing a high-quality module that’s pre-programmed to your vehicle’s specific VIN. This means it arrives ready to install, with the latest GM software updates, eliminating the need for an expensive and time-consuming trip to the dealership for programming.
Case Study: The Uplander That Wouldn’t Shift
A customer brought in their 2008 Uplander, explaining it was stuck in what felt like 3rd gear (limp mode) and the check engine light was on. They were worried they needed a costly transmission rebuild. I pulled the codes and saw a P0700 (TCM Requesting MIL) and a few solenoid circuit codes. Instead of jumping to the worst-case scenario, I checked the TCM. After seeing no external damage, I knew from experience this was a classic internal failure. I swapped in a VIN-programmed module just like this one. The total time was about 25 minutes. After a quick battery disconnect and reconnect, I cleared the codes, and the van shifted perfectly. The customer saved thousands and was back on the road the same day. This is the power of a proper diagnosis and the right part.
Is Your Uplander Exhibiting These Telltale Signs?
A failing TCM will give you clear warnings. If you’re experiencing any of the following, it’s highly likely your 2006-2009 Uplander TCM is the root cause. Ignoring these can lead to further transmission damage.
- ✔ Harsh, jerky, or delayed gear shifts.
- ✔ Vehicle is stuck in “limp mode” and will not shift out of 2nd or 3rd gear.
- ✔ Check Engine Light or Transmission Warning Light is illuminated.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, P0753, P0758, or other solenoid-related faults.
- ✔ Poor acceleration and decreased fuel economy.
- ✔ Complete loss of communication with the transmission, resulting in a no-shift condition.
Get Your Uplander Shifting Smoothly in Under 30 Minutes
One of the best features of this module is its straightforward installation. You don’t need a vehicle lift or specialized transmission tools. For the Chevy Uplander, the process is simple for any DIYer with basic hand tools.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the system.
- Locate the TCM: On the 2006-2009 Uplander, the TCM is conveniently located in the engine bay, mounted to the left-hand (driver’s side) strut tower. It’s an accessible black box with electrical connectors.
- Disconnect and Remove: Carefully unplug the electrical harnesses. They have locking tabs, so be gentle. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed TCM into place and securely reconnect the electrical harnesses. You’ll hear a click as they lock in.
- Final Steps: Reconnect the battery terminal. While the system often resets itself, it’s best practice to use a basic OBD2 scanner to confirm all transmission-related codes are cleared. Start the vehicle and take it for a test drive to confirm smooth shifting.
Verified Fitment for Your Vehicle
This Transmission Control Module is a guaranteed fit for the following vehicles, specifically programmed for your VIN upon order. While it is compatible with a wide range of GM models, this listing is for the specified vehicle.
- Chevrolet Uplander: 2006, 2007, 2008, 2009 (Transmission Control Module located at LH strut tower)
This module, part number 24238856, also interchanges with a variety of other GM service numbers, ensuring broad compatibility and OEM-level function across models like the Pontiac Montana, Buick Terraza, and Saturn Relay that share the same platform.
What does ‘VIN Programmed’ actually mean?
What does ‘VIN Programmed’ actually mean?
It means we load your vehicle’s unique 17-digit Vehicle Identification Number (VIN) and the latest GM software onto the module before we ship it. This ensures it communicates perfectly with your vehicle’s engine computer and other systems right out of the box, just like a new part from the dealer, but without the programming fee.
Do I need any special tools for this installation?
No. Basic hand tools, such as a socket set to remove the mounting bolts and a small flathead screwdriver to help with the connector tabs (if needed), are all that’s required. The entire job can be done in your driveway in under 30 minutes.
Will this fix a P0700 diagnostic trouble code?
Yes, in most cases. A P0700 code is a general fault code, meaning the TCM has detected a problem and has asked the main engine computer to turn on the check engine light. This programmed TCM is designed to resolve the internal electronic faults that trigger the P0700 and other related transmission codes.
Is there a core charge for my old part?
No, there is absolutely no core charge. You can keep your old part or dispose of it without the hassle of shipping it back to us, saving you time and money.