Used Subaru Engines

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Used Hummer Engines for Sale: Verified OEM Replacements

Hummer vehicles are engineered on robust General Motors truck platforms, designed for heavy-duty towing and utility. When your H2 or H3 requires an engine replacement, you need a solution that restores factory torque and reliability without the premium price of a crate engine.

At American Used Auto Parts LLC, we supply verified, expertly inspected used Hummer engines for sale across the United States. Because Hummers share their powertrains with the Chevy Silverado and Colorado lines, we maintain a deep inventory of Vortec V8 and Inline-5 assemblies.

We are committed to technical accuracy, ensuring you secure the precise VIN-matched assembly for your specific model, whether it is a 6.0L H2 or a 3.7L H3.

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Get a Free Quote or call us now for instant Support & Free Consultancy.

Our Quality Assurance Standard: The Hummer Protocol

At American Used Auto Parts LLC, we understand the specific engineering of the General Motors truck platforms that underpin the Hummer brand. Our sourcing and verification process is designed to ensure mechanical integrity for the heavy-duty Vortec V8 and Inline-5 powertrains.

1. Strategic Network Sourcing

We source used Hummer assemblies exclusively from verified insurance auctions and dismantling partners. We utilize the VIN (Vehicle Identification Number) to confirm the platform compatibility, as Hummer engines share architecture with the Chevy Silverado and Colorado lines.

H2 (Heavy Duty): We stock verified 6.0L (LQ4/LQ9) cast-iron block engines tailored for the 2500-series platform.
H3 (Mid-Size): Sourcing for the specific 3.5L (L52) and 3.7L (LLR) Inline-5 engines, as well as the 5.3L Alpha V8.

2. The "Long Block" Inspection Protocol

Our technicians focus on the known failure points of these specific GM truck engines.

Cylinder Head Check (H3 Specific): The Inline-5 engines are known for valve seat issues that cause rough idle. We perform a specific leak-down test to ensure the cylinder head valves are sealing correctly.
Manifold Bolt Inspection (H2 Specific): On 6.0L V8s, exhaust manifold bolts often snap. We check the cylinder head mounting points to ensure the threads are intact.
Compression Verification: We test cylinder pressure to ensure rings and pistons are within OEM tolerances for heavy towing applications.
Fluid Analysis: We check for coolant mixing in the oil ("milkshake"), which is critical for verifying head gasket integrity.

3. Accessory Policy (Critical)

To provide the best value, our engines are sold as Long Block Assemblies.

Included: Block, Cylinder Heads, Pistons, Crankshaft, Camshafts, Oil Pan.
Convenience Items: Accessories such as the Alternator, Starter, AC Compressor, and Power Steering Pump may be left attached for your convenience, but they are not covered under warranty. We highly recommend installing a new water pump and thermostat to guarantee reliability.

4. Professional Logistics & Safety

Once approved, every engine is fully drained of hazardous fluids to comply with shipping regulations.

- Secure Palletizing: The engine is strapped to a standard 4x4 pallet and shrink-wrapped.
- Sensor Protection: We take care to protect the variable valve timing solenoids (on 2008+ models) and plastic intake manifolds during transit.

Secure Your Hummer Engine: Request a Free Quote

Don't let a cylinder head failure keep your rig off the road. American Used Auto Parts LLC makes the sourcing process transparent and secure.

Your Quote Process

Request a Free Quote

Fill out our secure online form. Please have your VIN ready so we can identify if your H3 requires the 3.5L (2006) or 3.7L (2007+) engine.

Expert Matching

Our team uses GM data to ensure the replacement unit matches your specific reluctor wheel and connector type.

Fast, Reliable Delivery:

We ship directly to your repair shop or residence via insured LTL Commercial Freight. (Commercial address delivery is highly recommended).

Find Your Perfect Part at American Used Auto Parts

At American Used Auto Parts, we are all about getting your vehicle running great and saving you money. With our extensive inventory and commitment to quality, we are your go-to source for reliable used auto parts.

Used Engines: Verified OEM Replacements

Need a reliable replacement engine? Skip the high dealership costs. We stock a vast inventory of tested gas and diesel assemblies for all major domestic and import makes. Get your vehicle running smoothly again with a quality, low-mileage powertrain.

Turbochargers: Restore Factory Power

Replace worn induction units with our inspected used turbochargers and superchargers. Our verified components offer a precise, high-performance alternative to buying new, helping you restore original factory specifications and power for a fraction of the price.

Used Transmissions: Guaranteed Fitment

Drivetrain issues shouldn't keep you off the road. As a leading US supplier, we provide quality tested transmissions for cars, trucks, and SUVs. Whether you need an automatic, manual, or CVT, our nationwide network ensures the exact match for your vehicle.

Used Body Parts: Affordable Repairs

Fix collision damage without breaking the bank. At American Used Auto Parts LLC, we supply inspected OEM body panels—from bumpers and fenders to hoods and doors. Restore your vehicle’s exterior condition efficiently with genuine parts at significant savings.

Nationwide Inventory Network

6-Month Standard Parts Warranty

Fast Shipping

Quality Tested Auto Parts

The Smart Choice: Why Choose Recycled Auto Parts?

Genuine used auto parts are high-quality components reclaimed from vehicles to offer a cost-effective repair solution. We provide a wide array of inspected OEM items including engines, transmissions, alternators, rear axles, AC compressors, and other essential mechanical components, helping you restore your vehicle’s performance for less.

Smart Cost Savings

The most immediate benefit of choosing recycled auto parts is the substantial value compared to purchasing new dealer components. For vehicle owners managing maintenance costs, this translates into smart financial savings, allowing you to get your car back on the road efficiently without compromising on quality.

Genuine OEM Reliability

Unlike generic aftermarket copies, recycled auto components are Genuine OEM parts originally manufactured by your vehicle’s maker. This ensures precise fitment and established performance standards. To provide complete confidence, every part we sell is inspected and backed by our comprehensive warranty, offering you total peace of mind.

Eco-Friendly Automotive Solutions

Choosing recycled car parts is a win for the environment. By opting for reclaimed components, you are actively participating in the circular economy, keeping usable materials out of landfills. This practice significantly reduces manufacturing waste and contributes to the conservation of natural resources.

Nationwide Inventory Access

No matter what specific assembly you are searching for, our extensive network makes it simple to find. From replacement parts for domestic trucks to imported sedans like BMW or Honda, our vast selection ensures you can easily source the exact auto part you need, shipped directly from facilities in the USA.

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