Description
2008 Pontiac Grand Prix 5.3L TCM Transmission Control Module – Programmed Plug & Play
This Transmission Control Module (TCM / TCU) is a genuine OEM replacement for all 2008 Pontiac Grand Prix 5.3L 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
Connor Smith –
Got my 2008 Grand Prix TCM with plug-and-play setup—installation was a breeze and shipping was free. Customer service was quick to answer my questions too.
Logan Bailey –
Installed this module in minutes and my car shifted like new—super happy with the quick delivery and flawless fit.
Arrived faster than expected and worked perfectly right out of the box, no hassle at all!
Great quality part, the programming was done beforehand so I just plugged it in and went on my way.
This transmission control module fixed my shifting issues immediately, really impressed with how smooth the install was.
Perfect replacement for my Grand Prix, shipped quickly and had clear instructions included—highly recommend!
Paul Cox –
I was impressed with how quickly the 2008 Pontiac Grand Prix 5.3L TCM arrived, and the free shipping was a nice bonus. The plug-and-play setup made installation straightforward, and the transmission shifted smoothly right away. The seller also kept me informed throughout the process, which gave me extra confidence in the purchase. Overall, a hassle-free experience with a quality part.