GMC Yukon GMC Range Technology / Deactivates 4 and Activates only 8 cylinders From 2021 to 2026. Deactivates the 4 cylinders and runs on 8 cylinders all the time. You can watch Bahdalti's videos on YouTube under the name (Range Technology RA007 DFM Module Compatible with GM Refresh V8 Trucks and SUV) Price: 1100 SAR Last piece available