2008 Silverado 6.0 LY6 Vortec Engine and 4×4 6L90 Transmission Liftout Swap – 45K Miles

2008 Chevy Silverado 6.0L LY6 Vortec Engine & 4×4 6L90 Transmission Complete Dropout Swap (45,000 Miles)

Looking for the ultimate Gen IV LS swap package for your truck, SUV, or custom project build? This premium, low-mileage 2008 Chevy Silverado 6.0L LY6 Vortec engine and 4×4 6L90 automatic transmission liftout swap is the perfect turn-key performance upgrade.

With only 45,000 original miles, this complete engine and transmission dropout configuration offers an unbeatable combination of heavy-duty reliability, high-torque output, and massive performance potential. The legendary cast-iron block LY6 platform is highly sought after by enthusiasts in both the American and Australian markets for its ability to reliably handle up to 440+ wheel horsepower (WHP) with basic performance bolt-ons and tuning.

Engine & Transmission Specifications

GM 6.0L LY6 Vortec V8 Engine

• Engine Family: Gen IV LS-Based Small Block (VIN Code “K”)

• Displacement: 6.0L / 364 c.i.d.

• Block Material: Heavy-Duty Cast Iron (Casting #12576181) for maximum structural integrity under load or boost

• Cylinder Heads: High-Flow Aluminum Rectangular Port (Casting #5364 / #823) – shares design architecture with the legendary LS3/L92 heads for exceptional airflow

• Camshaft: Hydraulic Roller with Variable Valve Timing (VVT) for optimized low-end grunt and a smooth, stable idle

• Reluctor Wheel: 58X

• Throttle Control: 87mm Electronic Drive-by-Wire (DBW)

6L90E 6-Speed Automatic Transmission

• Configuration: 4×4 / Four-Wheel Drive heavy-duty application

• Gear Ratio Spread: Wide 6-speed array featuring an ultra-low first gear for heavy towing/launching and two overdrive gears for efficient highway cruising

• Strength: Upgraded heavy-duty variant of the 6L80E, built with a strengthened output shaft and thicker case to handle massive torque

Why Choose the LY6 / 6L90 Swap Package?

• No AFM/DOD Weaknesses: Unlike other Gen IV engines, the LY6 does not come factory equipped with Active Fuel Management (AFM) or Displacement on Demand (DOD). You avoid the notorious lifter failure issues entirely.

• Perfect Swap Foundation: The combination of a bulletproof iron block and LS3-style rectangle port heads makes this the ultimate platform for mild street builds, heavy towing, or high-horsepower forced induction (turbo/supercharger) projects.

• Turn-Key Liftout Convenience: This package is pulled as a comprehensive assembly, minimizing the time and extra parts needed to get your swap project up, running, and down the road.

What’s Included & Condition Report

This engine and transmission combination has been strictly multi-point inspected, compression tested, and run-tested to guarantee seamless operation.

Package Includes: Complete engine assembly (intake to oil pan), all belt-driven front accessories (alternator, power steering pump, bracketry), engine wiring harness, factory E38 ECM (Engine Control Module), and the matching 4×4 6L90 automatic transmission.