Stage 3 AI OBD2 Performance Chip for GMC | Plug-and-Play Engine Tuning Module +40 HP / +45 TQElevate Your "Professional Grade" Machine Your GMC was built to get the job done. Now, lets make it do it faster. GMC vehicles are the definition of capability. Whether you are hauling heavy equipment with a Sierra Denali, transporting the family in a Yukon XL, or navigating the job site in a Canyon, you demand power and reliability. However, factory tuning often strangles the engine to meet economy standards, resulting in sluggish acceleration and