Description
2008 Pontiac Montana 3.5L TCM Transmission Control Module – Programmed Plug & Play
This Transmission Control Module (TCM / TCU) is a genuine OEM replacement for all 2008 Pontiac Montana 3.5L models. Each unit is pre-programmed to your vehicle’s VIN and updated to the latest manufacturer calibration for a true plug-and-play installation with no dealer visit required.
Built to OEM standards for reliability, shift quality, and long-term performance.
Strict Testing & Quality Assurance
Each TCM is fully refurbished, bench-tested, and inspected by our certified in-house technicians.
We use professional off-board testing equipment to verify:
Proper CAN-bus communication
Shift-solenoid activation
Input/Output sensor signal validation
Temperature and load simulation
Live-data performance under simulated driving conditions
No module leaves our facility without passing a full quality control inspection. This ensures you receive a unit that performs better than new at an unbeatable value.
Common Symptoms of a Faulty TCM
Hard shifting / delayed shifting
Gear slipping
Stuck in Limp Mode
Transmission overheating
Erratic gear changes
Poor fuel economy
Trouble codes related to shift solenoids or communication
Important Note
This TCM is fully programmed and updated and does not require additional programming after installation.
Simply install the unit and the vehicle will recognize it automatically.
If your original TCM has unique calibration or custom parameters, we also offer a TCM Cloning Service, which transfers all data-including VIN, shift adaptations, and configuration settings-into the replacement unit.
Contact Us
Email: info@fixecm.com
Phone: Local: 647-247-8555 | Toll-Free: 1-800-915-5566
Chase Hall –
The programmed plug-and-play TCM fit my 2008 Montana perfectly, and the free shipping was a great bonus. Great communication throughout the process made this an easy purchase.
Mark Gray –
I was a bit nervous about replacing the transmission control module myself, but this unit for my 2008 Pontiac Montana made the whole process surprisingly easy. It arrived quickly and came pre-programmed, so all I had to do was plug it in and get going. My van shifted smoothly again right away, and I didn’t have to deal with any error codes or weird transmission behavior afterward. It saved me a ton on mechanic fees, and honestly, I’m impressed with the quality. If you’re on the fence about doing this repair yourself, this is definitely the way to go.
Aiden Taylor –
Arrived quickly and slipped right in—my Montana runs like new again! Highly recommend for a hassle-free fix.
Perfect fit and worked instantly, no extra programming needed. Saved me a ton on repair costs!
Super fast delivery and the install was a breeze. The truck shifts smoothly now, just like it should.
This TCM was ready to go out of the box and fixed my transmission issues immediately. Very happy with the purchase.
Great product and excellent customer support helped me get it up and running in no time. Definitely a five-star experience!
Kevin Bell –
This transmission control module was exactly what my 2008 Pontiac Montana needed. It came pre-programmed, which saved me a ton of time and hassle during installation—just plugged right in and worked perfectly. I was pleasantly surprised by the quick delivery, and the fit and function matched the original part flawlessly. Overall, a reliable replacement that restored my van’s smooth shifting without any extra trips to the mechanic.