2010–2017 Chevrolet Express/GMC Savana 2010–2013 Chevrolet Silverado 2010–2013 GMC Sierra 5.3 L The Generation IV 5.3L engines share all the improvements and refinements found in other Generation IV engines. 8 versions of the Gen IV 5.3L engine were produced: 3 iron blocks (LY5, LMG, and LMF) and 5 aluminum blocks (LH6, LH8, LH9, LC9, and LS4). All versions featured Active Fuel Management except for the LH8, LH9, and LMF. LH6 The Vortec 5300 LH6 (VIN code "M") 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. The LH6 produced and . It is the aluminum block counterpart to the LY5. 2005–2009 Chevrolet TrailBlazer including EXT (through 2006) 2005–2009 GMC Envoy Denali 2005–2006 GMC Envoy XL 2005 GMC Envoy XUV 2005–2007 Buick Rainier 2005–2009 Saab 9-7X 2005–2007 Isuzu Ascender 2007–2009 Chevrolet Silverado 1500 2007–2009 GMC Sierra 1500 LS4 LS4 can also refer to a Chevrolet Big-Block engine of the 1970s The LS4 is a version of the Generation IV block. Though it has the same displacement as the Vortec 5300 LY5, it features an aluminum block instead of iron, and uses the same cylinder head casting as the Generation III LS6 engine. The LS4 is adapted for transverse front-wheel drive applications, with a bell-housing bolt pattern that differs from the rear-wheel-drive blocks (so as to mate with the 4T65E). According to GM, "The crankshaft is shortened at the flywheel end and at the accessory drive end – to reduce the length of the engine compared to the 6.0 L. All accessories are driven by a single serpentine belt to save space. The water pump is mounted remotely with an elongated pump manifold that connects it to the coolant passages. Revised oil pan baffles, or windage trays, are incorporated into the LS4 to ensure that the oil sump stays loaded during high-g cornering." Active Fuel Management is also used. Output of this version is /300 hp on LaCrosse Super and . Applications: 2005–2008 Pontiac Grand Prix GXP 2006–2009 Chevrolet Impala SS 2006–2007 Chevrolet Monte Carlo SS 2008–2009 Buick LaCrosse Super LY5 Introduced in 2007, the Vortec 5300 LY5 (VIN code "J") is the replacement for the LM7 Generation III engine. For SUV applications, it is rated at and of torque; while for pickup truck applications, it is rated at at 5200 rpm and at 4000