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LH6 5.3L engine: specs, donor vehicles & swap notes

SpecValue
RPOLH6
FamilyGeneration IV
Years2005–2009
Displacement5.3 L / 325 ci
Horsepower300–315 hp
Torque330–338 lb-ft
Bore × stroke3.78 × 3.622 in
Compression9.95:1
Blockaluminum
AFM/DODYes
VIN 8th digitM

Aluminum, AFM, VVT*

Specs from secondary sources; GM ratings varied by year and vehicle.

Donor vehicles with the LH6

Where to find one at the junkyard. Confirm with the RPO sticker in the glovebox or the 8th VIN digit.

VehicleYears
Buick Rainier2005–2007
Chevrolet Silverado 15002007–2009
Chevrolet TrailBlazer including EXT (through 2006)2005–2009
GMC Envoy Denali2005–2009
GMC Envoy XL2005–2006
GMC Envoy XUV2005
GMC Sierra 15002007–2009
Isuzu Ascender2005–2007
Saab 9-7X2005–2009

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