Silverado Sierra 8.1l V8 Vortec Engine

Are you searching for a reliable, heavy-duty powerhouse to bring your Silverado Sierra 8.1l V8 Vortec Engine back to life? Look no further. We are offering a professionally inspected and performance-tested Silverado Sierra 8.1l V8 Vortec Engine—the same big block engine that powered GM’s most capable trucks in the early 2000s. Designed for raw strength, towing confidence, and unmatched durability, this engine is a rare gem in today’s market of smaller-displacement, turbocharged motors.

Whether you’re restoring a classic Silverado 3500, building a workhorse for your business, or need a powerful replacement for your Sierra 3500, this engine is the perfect fit. Don’t miss this opportunity to own one of GM’s last big block V8s—the legendary Silverado Sierra 8.1l V8 Vortec Engine (L18).

 Engine Overview:

• Make: General Motors (GM)

• Engine Type: Silverado Sierra 8.1l V8 Vortec Engine(Vortec 8100 / L18)

• Compatibility: 2001–2006 Silverado 3500 / Sierra 3500, Suburban 2500, Avalanche 2500, some HD chassis and medium-duty commercial trucks.

• Fuel Type: Gasoline

• Displacement: 8.1 Liters / 496 Cubic Inches

• Horsepower: Approx. 340–345 hp @ 4200 rpm (factory spec)

• Torque: 455–460 lb-ft @ 3200 rpm

• Valvetrain: OHV, 2 valves per cylinder (16 total)

• Block Material: Cast Iron

• Heads: Cast Iron

• Fuel System: Sequential Fuel Injection (SFI)

 Built for Heavy Duty Performance

The Silverado Sierra 8.1l V8 Vortec Engine was built from the ground up to handle the demands of towing, hauling, and commercial-grade workloads. Derived from the famous 7.4L (454ci) big block, the Vortec 8100 was the final evolution in GM’s big block gas engines.

It’s the ideal choice for:

• Heavy-duty pickups (Silverado/Sierra 3500)

• Motorhomes and RV conversions

• Off-road rigs or custom 4×4 builds

• Classic truck restorations

• Work trucks that require exceptional torque and endurance

 Why Buy This Engine?

1. Proven Reliability:
The Silverado Sierra 8.1l V8 Vortec Engine was known for its long service life, often exceeding 200,000 miles with proper maintenance. Built with thick iron castings, a forged steel crankshaft, and heavy-duty internals, this engine is no stranger to hard work.

2. Exceptional Torque Curve:
With nearly 460 lb-ft of torque on tap, this engine delivers low-end grunt perfect for towing trailers, hauling equipment, or powering larger vehicles like box trucks or RVs.

3. Simpler Than Modern Alternatives:
Unlike modern small displacement engines with complex turbochargers, this big block is old-school tough. That means easier repairs, fewer components to fail, and reduced maintenance costs over time.

4. Rare and In Demand:
GM discontinued the 8.1L in 2009, and good-condition engines are increasingly rare. This makes it a sought-after swap candidate for enthusiasts and professionals alike.

Engine Condition & Details

• Mileage: [Insert mileage here – e.g., “Approx. 89,000 miles on original engine”]

• Compression Tested: Yes, results available upon request

• Oil Pan to Intake: Complete long block (accessories negotiable)

• Manifolds Included: Yes – factory cast iron exhaust manifolds

• Intake System: Factory intake manifold and throttle body included

• ECU/PCM Available: Optional (additional cost if needed)

• Starter/Alternator/Accessories: Available separately or with bundle

Note: Engine is sold as a complete long block. Accessories such as wiring harnesses, sensors, and PCM/ECU may be included depending on your needs. We’ll work with you to ensure compatibility and help with any installation questions.

 Applications & Swaps

The Silverado Sierra 8.1l V8 Vortec Engine is a direct fit for Silverado and Sierra 2500/3500 HD trucks from the early 2000s. It’s also a popular swap choice for:

• Custom 4x4s and overland rigs

• RVs and bus conversions

• Marine applications (with appropriate upgrades)

• Restomods of classic GM trucks

• Replacing tired 454ci big blocks in older trucks

We can help advise on motor mounts, transmission compatibility (works with Allison 1000), ECU requirements, and emissions considerations depending on your state.

 Shipping & Pickup Options

We offer nationwide freight shipping at competitive rates. Local pickup is also available by appointment. The engine will be securely palletized and can be shipped to residential or commercial addresses with a loading dock or forklift.

• Shipping available in the U.S. and Canada

• Average freight cost: $250–$500 (depending on location)

• Liftgate service available

 Questions? Let’s Talk

Whether you’re a DIY enthusiast or a professional installer, we’re happy to answer any questions you have about compatibility, installation, or logistics. Photos, compression test results, and VIN verification are available upon request.

We’re committed to offering high-quality used engines that you can trust. This Silverado Sierra 8.1l V8 Vortec Engine has been in Summary – What You’re Getting:

• Genuine GM 8.1L Vortec V8 (L18) long block

• Compatible with Silverado/Sierra 3500 HD

• Ready to install, tested and inspected

• Torque monster built for hauling, towing, and performance

• Rare and becoming increasingly hard to find in this condition

 Contact Us Today

Interested? Want to reserve it before it’s gone? Reach out now via [sales@budsautoparts.com], or send a message through the platform. First come, first served. Serious buyers only.

This is your chance to own a piece of GM’s legendary big block heritage. Whether you need to get back on the road or build something custom, the Silverado Sierra 8.1l V8 Vortec Engine is the answer.