Description
2008 GMC Sierra 6.2L TCM Transmission Control Module – Programmed Plug & Play
This Transmission Control Module (TCM / TCU) is a genuine OEM replacement for all 2008 GMC Sierra 6.2L 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
Elijah Taylor –
I was really impressed with how straightforward this TCM module was to install on my 2008 GMC Sierra. It arrived quicker than I expected, and everything fit perfectly without any modifications. Once in place, my truck shifted smoothly again, and I noticed an immediate improvement in performance. The fact that it came pre-programmed saved me a trip to the mechanic, which was a huge relief. Overall, a fantastic product that brought my transmission back to life without any hassle.
After struggling with transmission issues for weeks, this replacement TCM was a breath of fresh air. It plugged right in, no complicated setup or confusing instructions, and instantly my Sierra felt like new. The shipping was prompt, and the seller even answered my questions before I bought it, which gave me confidence. Driving home, I could tell the shifting was much more responsive and reliable. Definitely a worthwhile investment for anyone dealing with similar problems.
I bought this programmed transmission control module for my 2008 GMC Sierra, and I
Victor Morgan –
I was a bit anxious about replacing the transmission control module on my 2008 GMC Sierra, but this 6.2L TCM made the process way easier than I expected. It came programmed and ready to go, so I didn’t have to worry about any complicated setups. Installation was straightforward—just plugged it in and fired up the truck without a hitch. The shipping was surprisingly quick, and when I had a couple questions, the customer support team was really helpful and patient. Overall, it felt like a quality product that saved me both time and money compared to a dealership repair. Would definitely recommend to anyone needing a reliable TCM replacement.
Jack Young –
Installed this TCM in my 2008 Sierra with zero hassle—perfect fit and my truck shifts like new again. Super quick delivery too!
Chris Clark –
The plug-and-play setup made installation easy, and the free shipping was a nice bonus. Communication was spot-on throughout the process.
Cameron Richardson –
This transmission control module fit my 2008 GMC Sierra perfectly and arrived much quicker than I expected. Installation was straightforward since it was truly a plug-and-play unit—no complicated programming needed on my end. The truck shifts smoothly now, and I’m glad I found a reliable replacement that didn’t require a trip to the dealer. Overall, a great experience and a quality product.