The world-class EcoTec3 5.3L V8 engine offers better fuel economy than any competitor – an estimated 23 MPG highway for 2WD models – without sacrificing performance. The strong, efficient EcoTec3 V8 generates 355 horsepower and 383 lb.-ft. of torque, so you have ample towing capability and power. E85 is not compatible with this engine.
Direct Injection determines the precise measure of highly pressurized fuel to inject into each cylinder to boost power and fuel efficiency while reducing emissions.
At cruising speeds when full engine power isn't needed, Active Fuel Management™ (AFM) deactivates cylinders, effectively turning the EcoTec3 V8 engine into a 4-cylinder. When it senses the need for full power, AFM instantly reengages all cylinders.
Variable Valve Timing helps ensure Suburban performs at optimum power and efficiency. It continuously adjusts valve timing to keep the EcoTec3 engine operating near peak output, while minimizing emissions.