Is Your Chevrolet Uplander Shifting Erratically or Stuck in Gear?
If you’re experiencing sudden harsh shifts, a transmission that refuses to shift, or a check engine light on your 2006-2009 Uplander, the problem is often not the transmission itself, but its electronic brain: the Transmission Control Module (TCM). I’ve seen it countless times in the shop—a customer comes in fearing a multi-thousand dollar transmission rebuild, only to find out the fix is a simple, straightforward module replacement. This T42 TCM, part number 24235340, is the definitive solution to restore your van’s smooth, reliable performance.
Real-World Diagnosis: A Customer’s Story
“A customer’s 2007 Uplander came in last week with the classic symptoms: it was stuck in 3rd gear (limp mode) and had a P0700 code stored. They were convinced the transmission was shot. After a quick scan and verifying power and ground at the TCM connector, we identified the module as the culprit. We installed one of our pre-programmed units, cleared the codes, and had them back on the road in under an hour with their van shifting perfectly. This is a common failure, and this module is the reliable fix.”
Symptoms of a Failing Uplander TCM
A faulty TCM can manifest in various ways, often intermittently at first. If you’re noticing any of the following, it’s time to inspect your module:
- ✔ Harsh Shifting & Banging into Gear: Abrupt, jerky gear changes during acceleration or deceleration.
- ✔ Limp Mode Activation: The vehicle gets stuck in a single gear (usually 2nd or 3rd) to prevent further damage.
- ✔ Check Engine & Transmission Lights: Often triggered by codes like P0700 (Transmission Control System Malfunction), P0750, or other solenoid-specific faults.
- ✔ Delayed or No Shifting: The engine revs high, but the transmission hesitates or fails to shift into the next gear.
- ✔ Poor Fuel Economy: Inefficient shifting and torque converter lock-up issues can cause a noticeable drop in MPG.
The Plug-and-Play Solution: Your 2006-2009 Uplander Transmission Module
Forget about expensive dealership visits and programming fees. This module is delivered to you fully programmed to your vehicle’s specific VIN. This crucial step ensures that the TCM communicates flawlessly with your Uplander’s engine computer and other systems right out of the box, restoring the original factory shift points and performance characteristics.
Plug-and-Play Installation: No Dealer Visit Required
Replacing the TCM on your Uplander is a job most DIYers can handle in their own driveway. The module is conveniently located, making for a quick swap.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and to help reset the vehicle’s computer systems.
- Locate the TCM: On the 2006-2009 Uplander, the Transmission Control Module is typically found mounted to the driver’s side (LH) strut tower in the engine bay.
- Disconnect and Remove: Carefully unplug the electrical connectors. Press the release tabs firmly. 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 should hear a ‘click’ as they lock in.
- Reconnect and Verify: Reconnect the negative battery terminal. Start the vehicle and allow it to idle for a few minutes. Use a basic OBD2 scanner to clear any lingering fault codes from the previous module. Test drive to confirm smooth shifting.
Guaranteed Compatibility and Reliability
This module is a direct replacement for a wide range of GM vehicles and is interchangeable with multiple part numbers, ensuring you get the right part the first time. It is built to meet or exceed OEM specifications for durability and performance.
- Part Number Interchange: 24235340, 24252114, 24234503, 24230461, 24234274, 24235754, 24238856, 24239224, 24239926, 24240400, 24241806, 24243901, 24243921, 24255280, 24256960, and more.
- No Core Charge: Keep your old part. There’s no need to worry about the hassle and expense of returning a core.
- One-Year Warranty: Drive with confidence knowing your purchase is protected by a one-year warranty.