The GM LQ4 is the iron-block 6.0L LS-family V8 built for heavy-duty truck and van applications — a proven, torque-forward powerplant that served in the Silverado HD, Sierra HD, Express van, Savana van, and H2 Hummer across the Gen III and Gen IV production run. This used GM LQ4 engine is a genuine OEM unit sourced from low-mileage donor vehicles and inspected before shipment. When your heavy-duty GM truck or van needs an engine replacement, the LQ4 is the factory-spec V8 it was built around.
Features
Tested Engine with Warranty
Hassle-Free Returns Available
Live Customer Support
Direct Fit for Your Vehicle
Description
This used LQ4 engine is a 6.0-liter V8 from GM’s LS family designed for reliable replacement in Chevy and GMC trucks and SUVs originally equipped with the LQ4 powerplant. Known for its cast-iron block strength and consistent torque delivery, the LQ4 engine is well suited for work trucks, towing applications, and performance-based replacements where durability is essential.
The LQ4 engine delivers approximately 300 to 325 horsepower and 360 to 370 lb-ft of torque depending on model year and configuration. It has been widely used in vehicles such as the Chevrolet Silverado, GMC Sierra, Chevrolet Suburban, GMC Yukon, Cadillac Escalade, and Hummer H2. Exact compatibility may vary by year and drivetrain, so VIN verification is recommended prior to purchase. If you are comparing options, you can also explore our inventory of used GM engines, all tested and shipped nationwide for dependable performance.
Every used LQ4 engine offered for sale is thoroughly tested and inspected before shipping. The inspection process includes checks for compression, leaks, and overall mechanical condition to ensure dependable operation. Only engines that meet quality standards are approved for sale. This engine is ideal for replacing a failed or high-mileage factory unit while maintaining OEM performance. Professional installation is recommended for best results. Nationwide shipping is available throughout the United States, and warranty options are included to provide confidence after installation. For manufacturer-level engine specifications, you may review GM’s official engine resources.
LQ4 fitment requires matching your specific application and model year. The HD truck application differs from the Express/Savana van application in oil pan design and accessory configuration. The H2 Hummer application has its own specific mounting and output shaft requirements. Our VIN verification process confirms the exact LQ4 for your vehicle before it ships.
GM HD truck and commercial van operators comparing a used engine, a remanufactured engine, and an OEM engine for the LQ4 find the used OEM route offers the most direct path to factory capability restoration. A used GM LQ4 engine from a verified low-mileage donor gives you the factory iron-block 6.0L assembly as an OEM engine — the factory torque rating, the factory iron block durability, the factory emissions calibration — at a price that gets your vehicle back to work without rebuild delays. No remanufactured engine offers the original factory assembly that a used OEM LQ4 delivers.
Every used GM LQ4 engine ships with up to a 90-day warranty and arrives within 2 to 5 business days. Installation is not included. These are genuine GM OEM engines, and we stand behind every unit.
Specifications
Product Type
Engine
Displacement (Engine Size)
6.0L V8 (5967 cc)
Fuel Type
Gasoline
Availability
In Stock
Shipping
Nationwide Available
Use Case
Ideal for upgrades or replacements
Frequently Asked Questions
What vehicles had an LQ4?
The LQ4 comprises of various vehicles including the Chevrolet Silverado, GMC Sierra, Chevrolet Suburban, GMC Yukon, and Hummer H2.
Is a LQ4 a good engine?
Yes, the LQ4 is widely considered a great engine, especially for its intended purpose as a durable workhorse and for aftermarket performance builds.
How much horsepower does a LQ4 engine have?
A stock LQ4 engine produces horsepower of up to 300 to 330 hp, depending on the model year and trim level.
How much does a LQ4 engine rebuild cost?
An LQ4 engine rebuild can cost $2,500 to $10,000 or more, depending on the extent of the rebuild.
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Shipping Policy
Our shipping policy is flexible, as the shipping charges depend on the location. A few certain remote regions like CO, UT, NY, OR, & CA may have additional shipping charges or delivery fees. However, some circumstances may cause delays, but we always strive to deliver your order as quickly as possible.
Please note that all shipping times are estimates and not guaranteed. We examine all rebuilt and used engines before shipment and aim to provide high-quality used engines and transmissions. Shipping details and fees will be disclosed to consumers before any transactions are made. Our team is operational 24/7, and you can call us at +1-888-799-0188 to place an order.
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