COMPARE LS OPTIONS
LS replacement engines & rebuilds
Compare stock remanufactured exchange engines, customer-core rebuilds, Stage 1/2 packages and named builds with their distinct warranty terms.
Explore LS enginesChevrolet · GMC · GM engine families
Find the right GM engine.
Start with your engine family. Compare replacement options, performance builds and short blocks, then go to the actual product for current pricing and purchase or request options.
Choose your starting point
Each path leads to existing engine information or catalog products. Prices, availability, included parts and warranty terms are specific to the engine you choose.
REPLACEMENT & UPGRADE OPTIONS
Gen V LT engines
Explore the LT engine family, compare build options, and open the matching catalog listing. Choose by engine code and vehicle configuration—not displacement alone.
Explore LT enginesPERFORMANCE BUILDS
LS performance engines
Browse LS performance options and named builds. Match the engine combination to your intended use, fuel and power goal before selecting a product.
Explore LS performanceLOWER ENGINE ASSEMBLIES
Chevrolet LS short blocks
Compare LM7 5.3L, LQ4 6.0L and LS 408 foundations, with direct links to current products. Confirm the exact included components before ordering.
Shop LS short blocksMORE GM APPLICATIONS
Full engine & parts catalog
Looking for another GM engine, a stock replacement, or supporting parts? Search the catalog by engine code or part number and confirm the application with Big 3.
Search the catalogKnow your LT engine code?
Go directly to the relevant engine page. L83 and L84 are 5.3L options; L86 and L87 are 6.2L options. LT1 is also a 6.2L engine—not a 5.3L.
Match the engine to the vehicle—and the job.
A replacement for a daily-driven truck, a customer-engine rebuild and a purpose-built performance engine are different purchases. Share your year, make, model, VIN, engine code and intended use so we can help identify the appropriate option.
Confirm the exact assembly, any parts you will reuse, warranty coverage, shipping or pickup arrangement and applicable core requirements before ordering. A matching displacement does not by itself establish interchangeability.
Talk through your build
Find your engine family or vehicle
Start with the original engine code and VIN. These guides cover different years and configurations; confirm fitment before selecting a product.