The Generation III Vortec Chevy Engines with 5300cc, or more commonly called the LM7/LM4/L59/L33, is a V8 truck engine. It is a longer stroke version of the Vortec 4800 and replaced the 5700 L31. The L59 denotes a flexible fuel version, while the LM7 was the standard version of the engine.
The LM7 Vortec 5300 was introduced in 1999, and can be considered the “General Motors Corporation” version of the Generation III 5.3 liter V8’s.
LM7 applications:
* 2002-2005 Cadillac Escalade 2WD
* 2002-2006 Chevrolet Avalanche
* 2003-2007 Chevrolet Express/GMC Savana
* 1999-2007 Chevrolet Silverado 1500
* 1999-2007 GMC Sierra 1500
* 1999-2006 Chevrolet Suburban/GMC Yukon XL
* 1999-2006 Chevrolet Tahoe/GMC Yukon
The LM4 was an aluminum block version of the LM7, and had a short production life. It should not be confused with the L33.
LM4 applications:
* 2004 Chevrolet TrailBlazer EXT
* 2004 GMC Envoy XL
* 2004 Chevrolet SSR
The L33 was an aluminum block version of the LM7, and was referred to as the Vortec 5300 HO in marketing materials. Horsepower increased by 15, to 310, over the LM7, and torque was unchanged. It was only available on extended cab 4WD pickup trucks.
L33 applications:
* 2005-2007 Chevrolet Silverado 1500 4WD
* 2005-2007 GMC Sierra 1500 4WD
The L59 Vortec 5300 was introduced in 2002, and was a flexible fuel version of the LM7. Horsepower and torque ratings matched that of the LM7.
L59 applications:
* 2002-2007 Chevrolet Silverado 1500
* 2002-2006 Chevrolet Tahoe/GMC Yukon
* 2002-2006 Chevrolet Suburban/GMC Yukon XL
* 2002-2007 GMC Sierra 1500
First introduced in 2005, the Generation IV Vortec 5300 engines share all the improvements and refinements found in other Generation IV engines. At present, four versions of the 5300 are in production: 2 iron block versions (LY5 and LMG) and 2 aluminum block versions (LH6 and LC9). All versions feature the Active Fuel Management system.
LH6
The LH6 with Active Fuel Management replaced the LM4 for 2005, and was the first of the Generation IV small block V8 truck engines to go into production. It is the aluminum block counterpart to the LY5.
LH6 applications:
* 2005-2007 Chevrolet TrailBlazer including EXT
* 2005 GMC Envoy XL
* 2005 GMC Envoy XUV
* 2005-2007 Buick Rainier
* 2005-present Saab 9-7X
* 2007 Chevrolet Silverado 1500
* 2007 GMC Sierra 1500
Introduced in 2007, the LY5 Vortec 5300 is the replacement for the LM7 Generation III engine. For SUV applications, it is rated at 320 hp for pickup truck applications, it is rated at 315 hp.
LY5 applications:
* 2007-present Chevrolet Avalanche
* 2007-present Chevrolet Silverado 1500
* 2007-present Chevrolet Suburban 1/2 ton
* 2007-present Chevrolet Tahoe
* 2007-present GMC Sierra 1500
* 2007-present GMC Yukon
* 2007-present GMC Yukon XL 1/2 ton
The LMG Vortec 5300 is the FlexFuel version of the LY5. Horsepower and torque ratings for SUV and pickup truck applications are the same as each application’s LY5 rating.
LMG applications:
* 2007-present Chevrolet Avalanche
* 2007-present Chevrolet Silverado 1500
* 2007-present Chevrolet Suburban 1/2 ton
* 2007-present Chevrolet Tahoe
* 2007-present GMC Sierra 1500
* 2007-present GMC Yukon
* 2007-present GMC Yukon XL 1/2 ton
The LC9 Vortec 5300 is the FlexFuel version of the LH6, and is found in 4WD models. SUV applications are rated at 310 hp (231 kW) and 335 ft·lb (454 N·m) of torque.
LC9 applications:
* 2007-present Chevrolet Avalanche
* 2007-present Chevrolet Silverado 1500
* 2007-present Chevrolet Suburban 1/2 ton
* 2007-present GMC Sierra 1500
* 2007-present GMC Yukon XL 1/2 ton
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