In general, the General Motors Vortec 5.3-liter V8 is a powerful, dependable engine. If you're not familiar with General Motors' Vortec engines, they are a family of small-block V8s that GM put ...

Vortec 4.8L V8 SFI engine or (GU5) 3.23 ratio rear axle or (GU6) 3.42 ratio rear axle. Required on 2WD models with (LY5) Vortec 5.3L V8 SFI engine with Active Fuel Management or (LMG) Vortec 5.3L ...

(Requires (LMG) Vortec 5.3L V8 SFI FlexFuel engine with Active Fuel Management or (LY5) Vortec 5.3L V8 SFI with Active Fuel Management and (GU6) 3.42 ratio rear axle.) Trailering Package Heavy ...

VORTEC 5.3L V8 SFI WITH ACTIVE FUEL MANAGEMENT (315 HP [234.9 KW] @ 5200 RPM, 338 LB-FT OF TORQUE [456.3 N-M] @ 4400 RPM), ALUMINUM BLOCK ...

VORTEC 5.3L V8 SFI WITH ACTIVE FUEL MANAGEMENT (315 HP [234.9 KW] @ 5200 RPM, 338 LB-FT OF TORQUE [456.3 NM] @ 4400 RPM), IRON BLOCK ...