†Sierra 1500 based on EPA estimates of XFE 2WD models with an available 4 speed automatic Vortec 5.3L V8 engine; Sierra Denali based on EPA estimates of 2WD models with an available 6-speed automatic Vortec 6.2L high-output V8 engine; Sierra Hybrid based on EPA estimates of 2WD model; Canyon based on EPA estimates of 4WD models with an available Vortec 2.9 L inline 6-cylinder engine; Acadia based on EPA estimates of FWD models with an available 3.6L V6 engine; Yukon based on EPA estimates of XFE 2WD models with an available Vortec 5.3L V8 engine; Yukon XL based on EPA estimates of 2WD models with an available Vortec 5.3L V8 engine; Yukon Denali based on EPA estimates of models with an available Vortec 6.2L V8 engine; Yukon Hybrid based on EPA estimates of 2WD models with an available Vortec 6.0L V8 SFI, LIVC engine; Yukon Denali Hybrid based on EPA estimates of 2WD models with an available Vortec 6.0L V8 SFI, LIVC engine; Envoy based on EPA estimates of 4WD models with an available Vortec 4.2 L inline 6-cylinder engine; Envoy Denali based on EPA estimates of 2WD models with an available Vortec 5.3 L V8 engine with Active Fuel Management. Savana passenger based on EPA estimates of RWD models with an available Vortec 5.3L V8 engine; Savana cargo based on EPA estimates of RWD 15000 models with an available Vortec 4.3L V6 engine; Terrain FWD EPA-estimated MPG: 22 city/32 hwy with 2.4L 4-cylinder engine.