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GM Engine Codes

Explore General Motors brands, engine families and commonly requested replacement part types. Current and discontinued marques appear together for reference.

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ENGINE CODE • OEM NUMBER • VIN
Fitment, stock, condition and price are checked individually.
12Current & former GM marques
428Curated GM code / family entries
122Popular parts types
16Automotive parts systems
GM ENGINE LOOKUP

All GM engine codes

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All engine familiesClassic small-block V8Gen III LS / Vortec V8Gen IV LS / Vortec V8Gen V EcoTec3 / LT V8Classic big-block V8Duramax dieselEcotec I4 / turboV6 / 3800 / High FeatureTruck / SUV gas V8Duramax light / heavy-duty dieselV6 / turbo / inlineNorthstar / historic V8LS / LT / Vortec V8Cadillac V6 and turbo3800 / V6Turbo and Ecotec four-cylinderClassic Buick V8LS / Pontiac performanceQuad 4 / Ecotec / four cylinderClassic Pontiac enginesV6 / utilityOldsmobile Rocket / V8V6 / shared GMQuad 4 / AuroraEcotec / four-cylinderH1 / H2 / H3 enginesCommodore / HSV V8Holden / GM V6Four-cylinder / turboGM-era Opel petrolGM-era Opel dieselGM-era Vauxhall petrolGM-era Vauxhall dieselGM-era Saab four / six cylinder
POPULAR GM CODES: LS Series ↗ LT Series ↗ LQ Truck Engines ↗

Showing 0 of 0 engine references. All pages can be browsed; choose LS, LT or LQ to narrow the list. These are reference codes, not engines verified in stock.

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Important identification note

General Motors engine codes can cover multiple variations. GM-era Opel, Vauxhall, Saab and Holden are historical ownership associations; not every engine was engineered by GM. A directory entry does not guarantee fitment, interchange, OEM sourcing, available stock, or a quoted price. Verify OEM numbers and VIN before ordering.

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