Description

The Chevy 6.0L LS V8 Remanufactured Engine 1999–2000 is based on GM’s LS engine architecture, one of the most influential modern V8 engine families. Introduced in the late 1990s, the LS engine platform quickly became popular because of its compact design, durability, and strong performance capabilities.

The 6.0-liter version of the LS engine was developed primarily for heavy-duty truck applications where additional torque and durability were required. Early variants of the 6.0L engine were known by engine codes such as LQ4, which were commonly used in Chevrolet and GMC trucks.

This engine features a 6.0-liter displacement (364 cubic inches) and a traditional overhead valve pushrod design with two valves per cylinder. The engine uses a cast-iron engine block combined with aluminum cylinder heads to provide strength and efficient heat dissipation.

Remanufactured versions of this engine undergo a complete rebuilding process designed to restore factory tolerances and long-term reliability.

Where This Engine Is Used

The Chevy 6.0L LS V8 Remanufactured Engine 1999–2000 was commonly installed in GM trucks and utility vehicles produced around the turn of the millennium.

Typical applications include:

• Chevrolet Silverado 2500

• Chevrolet Silverado 3500

• GMC Sierra 2500

• GMC Sierra 3500

• Chevrolet Suburban 2500

• GMC Yukon XL

Because these trucks were designed for towing and heavy-duty use, the 6.0-liter LS engine became a widely trusted powertrain option.

Today, many of these vehicles remain in service, making 6.0L LS replacement engines an important solution when high-mileage engines require replacement.

Engine Performance and Reliability

The Chevy 6.0L LS V8 Remanufactured Engine 1999–2000 is rebuilt using a professional remanufacturing process that restores the engine to reliable operating condition.

Typical rebuilding procedures include:

• complete engine disassembly and inspection

• thorough cleaning of all components

• machining of engine block and cylinder heads

• replacement of pistons, rings, bearings, seals, and gaskets

• inspection of crankshaft and camshaft components

Factory versions of the 6.0-liter LS engine typically produced approximately 300 horsepower and about 360 lb-ft of torque, providing strong pulling power for trucks and heavy vehicles.

The LS platform is also known for its strong internal design, which allows the engine to handle significant mileage when properly maintained.

Why This Engine Is a Reliable Choice

Replacing a worn engine with the Chevy 6.0L LS V8 Remanufactured Engine 1999–2000 offers several advantages.

Key benefits include:

• restored factory engine tolerances

• compatibility with GM LS drivetrain systems

• strong torque output for truck applications

• durable cast-iron engine block

• extended service life for older vehicles

Because the LS engine platform is widely used in performance and truck applications, replacement engines are often chosen to extend the lifespan of existing vehicles.

Who This Engine Is Best For

The Chevy 6.0L LS V8 Remanufactured Engine 1999–2000 is designed for buyers who need a reliable replacement engine for GM trucks equipped with the 6.0-liter LS engine.

Typical buyers include:

• Chevrolet or GMC truck owners

• automotive repair technicians

• independent repair shops

• fleet maintenance operators

• mechanics performing engine replacements

For high-mileage trucks, installing a GM 6.0 LS remanufactured engine can restore reliable vehicle performance.

Key Specifications

The Chevy 6.0L LS V8 Remanufactured Engine 1999–2000 is built on the GM LS engine platform.

Key characteristics include:

• engine type: V8 gasoline engine

• displacement: 6.0 liters (364 cubic inches)

• valvetrain: OHV pushrod design

• cylinder heads: aluminum

• engine block: cast iron

• fuel system: sequential fuel injection

• horsepower: approximately 300 hp

• torque: approximately 360 lb-ft

These specifications make the engine suitable for heavy-duty truck applications and performance builds.

Frequently Asked Questions

What vehicles used the 6.0L LS engine?

The 6.0L LS engine was used in several Chevrolet and GMC trucks, including Silverado 2500/3500 and Sierra 2500/3500 models.

How powerful is the Chevy 6.0L LS engine?

Early versions of the engine typically produced around 300 horsepower and approximately 360 lb-ft of torque.

What is a remanufactured engine?

A remanufactured engine is completely disassembled, inspected, cleaned, and rebuilt using new or refurbished internal components to restore reliable performance.

Is the LS engine platform reliable?

Yes. The GM LS engine family is widely known for durability, strong performance, and long service life.

Who installs replacement engines?

Replacement engines are usually installed by professional mechanics or automotive repair shops specializing in engine replacement services.

1999-2000 Chevrolet GMC 6.0L V8. Block Cast #1364. VIN Code U.

This engine engine comes as a long block as pictured

We have improved this engine with the following components

• Hypereutectic side skirt coated pistons to reduce
• Improved flow oil pump due to higher output volume
• newly improved valve seals to promote longevity and overall reduction in oil consumption
• utilize M.L.S. multi layer steel head gaskets to strengthen head to block sealing
•  New TTY torque to yield head bolts installed on every build to improve head clamp load and prevent gasket failure
• multi angle valve seat resurfacing on CNC equipment to improve valve sealing
• Improved rod and main bearing design
• improved piston wrist pin design to eliminate the dreaded LS tap or knock

Engine fitment can be verified with the notes and ‘Vehicle Fitment’ tab above, or with the casting numbers under ‘Additional Information’

Every engine we sell is fully remanufactured to meet or exceed OEM specifications:

• Deep Clean – To start the remanufacturing process, every engine is fully disassembled and hot tanked (cast iron) or thermally cleaned (aluminum)
• Inspection – Magnaflux testing uses magnetic particles to inspect metal, checking for microscopic cracks and fissures that will cause long-term failure. All parts are visually inspected as well.
• Machining and New Parts – Deck surfaces are CNC machined and new parts are added. New parts inlcude bearings, pistons, rings, lifters, oil pump, gaskets, Viton™ valve seals, freeze plugs, galley plugs and either a new timing chain (with new tensioners) or a new timing belt (with new tensioner). If an engine has a timing-driven water pump, a new pump is installed.
• SIM Testing – Each engine is SIM tested after reassembly, with the cooling and oil systems being fully pressurized and the crank being spun at high RPM to verify compression and build quality.

Because of our rigorous remanufacturing process, we can offer the industry’s best warranties. Each engine comes with up to 7 years and 1 million miles of warranty, which can be upgraded to include Pure Care™ no-fault protection. No other engine manufacturer comes close.