Vortec® 5.3L V8 SFI FlexFuel engine with Active Fuel Management® and E85 FlexFuel capability

This engine gives you a great balance of power and efficiency. The advanced Active Fuel Management® delivers additional power when needed, and automatically deactivates four of the eight cylinders when cruising on level ground. The E851 capability allows the engine to run on unleaded gasoline or up to 85% ethanol. The aluminum block construction provides lightweight strength. This engine is available on 4WD 1/2-ton models only.

When running on regular gasoline, the engine provides 320 hp @ 5400 rpm and 335 lb-ft of torque @ 4000 rpm; the EPA-estimated city/highway MPG is 15/21.2 When running on E85 ethanol, the engine offers 326 hp @ 5300 rpm and 348 lb-ft of torque @ 4400 rpm; the EPA-estimated city/highway MPG is 11/163.

1 E85 is a combination of 85% ethanol and 15% gasoline. Go to chevy.com/biofuels to see if there is an E85 fuel station near you.