This used OEM 2011–2013 GMC Sierra 1500 4.3L LU3 engine for sale has 57,987 miles and was sourced from a compatible 2012 GMC Sierra 1500 LU3 V6 engine before being inspected and prepared for inventory. This VIN X engine gives buyers searching for a GMC Sierra 1500 V6 replacement an original used OEM assembly rather than an unverified remanufactured or aftermarket motor.

Removed from a compatible GMC donor vehicle
Stored indoors under protected conditions after removal
Exterior block, cylinder-head areas, and mounting points visually inspected
Verified as a used OEM 4.3L LU3 V6 for the listed Sierra application

This engine fits select 2011, 2012, and 2013 GMC Sierra 1500 models equipped with the 4.3L LU3 V6 engine and VIN X in the 8th position. Because Sierra engine compatibility can depend on the complete VIN, drivetrain, transmission, emissions equipment, wiring, sensors, accessories, and original vehicle configuration, these details should be verified before installation. Interchange number 300-05149 should also be compared with the original engine before purchase.

Before listing, this used GMC engine was inspected and tested to assess its general mechanical and visible condition.

Compression checked for consistency across all six cylinders
Oil-leak inspection completed around major seals and gasket areas
General operating condition reviewed before inventory listing
Exterior block and mounting points checked for visible damage
Individual oil-pressure readings were not supplied

This VIN X LU3 engine includes a 6-month standard warranty, with extended warranty options available up to 1 year on eligible parts. Confirm the complete VIN, LU3 engine identification, drivetrain, transmission, emissions configuration, and interchange number before ordering so the engine can be matched correctly to your GMC Sierra 1500.

Key Specifications

Brand: GMC
Model: Sierra 1500
Years: 2011–2013
Engine Size: 4.3L
Engine Type: Naturally Aspirated V6 Gasoline
Engine Name: LU3 4.3L Vortec V6
VIN Code: X, 8th Digit
Mileage: 57,987 miles
Interchange Part Number: 300-05149
Part Grade: A
Part Category: U = Used
Condition: Used OEM engine assembly
Testing: Compression, oil-leak inspection, general operating condition, and exterior condition reviewed
Storage: Indoor protected-pallet storage
Warranty: 6-month standard warranty included, with extended warranty options available up to 1 year on eligible parts
Shipping: Fast freight shipping available to commercial addresses

2011 2012 2013 GMC Sierra 1500 4.3L LU3 Engine For Sale

Name: 2011 2012 2013 GMC Sierra 1500 4.3L LU3 Engine For Sale
Brand: GMC
SKU: BPA-USD-G8A
Price: 2538 USD
Availability: InStock

SKU: BPA-USD-G8A

$2,700.00

$2,538.00

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Engine Components:

Block

Camshafts

Crankshaft

Cylinder Heads

Head Gaskets

Pistons

Rods

Engine Accessories:

Exhaust Manifold

Intake Manifold

Oil Pans

Timing Belt

Timing cover

Note: Included accessories may differ based on donor vehicle and engine condition. Please verify component options prior to purchasing.
Shipping can be arranged to either a business or residential address. If you’re having the engine shipped to a residential location, just note that there may be an extra charge. Once it arrives, we recommend inspecting the shipment thoroughly before signing off, especially if there's visible damage. If anything looks out of place, make sure it’s documented.
When it comes to installation, you may need to transfer over some of your existing accessories like the manifolds.

This is standard with most engine swaps, so your mechanic will know what to do.

Shipping & Delivery Freight carriers prefer commercial addresses. Additional Fees: Residential delivery + liftgate service $100

⚠ Important: Inspect the shipment before signing. Report any damage immediately.
For any questions regarding compatibility or shipping details, please feel free to reach out! Ensure this engine fits your vehicle by verifying the VIN and specific requirements before purchase

This image is provided solely for reference to indicate the applicable engine type and compatibility. The engine supplied may not be the exact unit shown and may exhibit variations in external appearance; however, it will be equivalent in specification, functionality, and fitment, in accordance with the agreed technical standards

Fast and secure freight delivery available. Residential and commercial delivery options with liftgate service

Before You Buy: Use your VIN to verify fitment If necessary confirm components included In most cases professional installation is recommended