(Image/Summit Racing)

So, you’re heading to the junkyard to see what LS engines are available for your next project?

Here’s a handy guide that links specific GM vehicles to the LS-series engine found under each one’s hood.

The GM LS family is quite large, broken into Generation III/IV, so don’t be surprised when you see overlap and unfamiliar RPO codes.

If you’ve already got a specific LS engine in mind, use our LS Engine Spotter’s Guide, Part 2: Matching the Engine to the Vehicle post to find the vehicles it came in.

We’ve also got a post on how to Identify Your LS Engine.

Confused about the LS family tree? Don’t be, check out this 101-style primer.

Chevy LS Engines

GMC LS Engines

Cadillac LS Engines

Pontiac LS Engines

Hummer LS Engines

Isuzu LS Engines

Saab LS Engines

Buick LS Engines

ModelYearEngine RPO
Rainier2004 5.3L Vortec LM4
Rainier2005-07 5.3L LH6
Lacrosse Super2008-095.3L LS4

NOTE: You can find engine specs and detailed engine upgrade advice for every LS and LS-based Vortec truck engine in one place: The Definitive Guide to LS Engine Specs and LS Engine Upgrades.

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