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The Chevy Engines called the Vortec 5700 L31 series, is a V8 truck engine, with a displacement of 5.7 L. It is the last production Generation I small-block from Chevrolet. The cylinder heads feature combustion chambers very similar to those of the LT1 V8, but without the reverse-flow cooling.

It offers the performance of more expensive heads, at a much lower cost. It does, however, require a specific intake manifold (a Vortec head has four bolts attaching the intake manifold as opposed to the traditional six bolts per head).

The L31 was replaced by the 5.3 L 5300 LM7. The 2002 model year was the final year for the L31 5.7 L small block V-8 whose origins date back to 1955. The Vortec 5700 is good for 255 horsepower and 330 lb·ft of torque bone stock. It is currently being produced as a crate engine for marine applications and automotive hobbyists as the “ramjet 350″ with minor modifications.
L31 applications:

* 1996-2003 Chevrolet Express/GMC Savana full-size vans
* 1996-1998 General Motors C/K full-size trucks
* 1996-1999 Chevrolet Suburban/GMC Suburban full-size long-wheelbase SUVs
* 1996-1999 Chevrolet Tahoe/GMC Yukon full-size short-wheelbase SUVs
* 1999-2000 Cadillac Escalade

Generation III, The Vortec 6000, or LQ4, is a V8 truck engine. It is a bored out version of the Vortec 5300. Displacement is 6.0 L, it is an iron block/aluminum heads (note that 2000 model year engines had cast iron heads) design and produces 300-325 hp . LQ4s are built in Romulus, Michigan and Silao, Mexico.
LQ4 applications:

* Chevrolet Express/GMC Savana
* Chevrolet Silverado 2500 Pickup, 3500 Pickup, Crew Cab, and Chassis Cab/GMC Sierra 2500 HD Pickup and Crew Cab, C3, Denali, and 3500 Pickup and Chassis Cab, 1500HD Crew Cab
* Chevrolet Suburban/GMC Yukon XL Denali
* Hummer H2 SUT
* GMC Yukon Denali

The Vortec HO 6000 or VortecMAX, technically the LQ9, is a special high-output version of the Vortec 6000 V8 truck engine originally designed for Cadillac. This engine was introduced in other truck lines as VortecMAX for 2006. It features high-compression (10:1) flat-top pistons for an extra 10 hp and 10 ft·lb, bringing output to 345 hp (257 kW) and 380 ft·lb (515 N·m). LQ9s are built only in Romulus, Michigan.
LQ9 Applications:

* 2002-2006 Cadillac Escalade
* 2002-2006 Cadillac Escalade EXT
* 2003-2006 Cadillac Escalade ESV
* 2003-2007 Chevrolet Silverado SS
* 2004-2005 Chevrolet Silverado and GMC Sierra Vortec HO Edition Only [Badging on truck]
* 2006-2007 Chevrolet Silverado and GMC Sierra VortecMAX Option

Generation IV, The Vortec 6000 LY6 is a Generation IV small block V8 truck engine. It shares the same bore and stroke as its LQ4 predecessor, and also features variable valve timing.
LY6 applications:

* 2007-present Chevrolet Silverado HD
* 2007-present GMC Sierra HD
* 2007-present Chevrolet Suburban 3/4 ton
* 2007-present GMC Yukon XL 3/4 ton

The Vortec 6000 L76 is a Generation IV small block V8 truck engine and features variable cam phasing, along with Active Fuel Management. It can be considered the replacement for the Generation III LQ9 engine. It produces 367 hp (265 kW) at 5400 rpm. Production started in late 2006.
L76 applications:

* 2007-present Chevrolet Suburban
* 2007-present Chevrolet Avalanche
* 2007-present Chevrolet Silverado
* 2007-present GMC Sierra
* 2007-present GMC Yukon XL

The 2007 Cadillac Escalade has a 6.2 L Vortec 6200 (RPO L92) engine. It is an all-aluminum design which, while still a pushrod engine, boasts variable valve timing, a first in a mass-produced non-overhead cam V8 engine. The system adjusts both intake and exhaust timing between two settings. This engine produces 403 hp (301 kW) and 417 ft·lb (565 N·m) in the Cadillac and in the GMC Sierra Denali, and underated at 380 hp and 415 ft·lb in the Hummer and in the GMC Yukon Denali .
Applications:

* 2007+ Cadillac Escalade
* 2008+ Chevrolet Tahoe
* 2007+ GMC Yukon Denali/Denali XL
* 2007+ GMC Sierra Denali
* 2008+ Hummer H2

The Vortec 7400 (RPO L19) was a truck version of the Chevrolet Big-Block engine. Introduced in 1996, it was produced for five years until being replaced by the Vortec 8100. Even though it was introduced as the Vortec 7400 in 1996, it was basically a 454 big-block with parts more suitable for use in light-duty trucks and more advanced technology. The 7.4 L (454 ci) V8 features MPFI (multi-port fuel injection) and 2 valves per cylinder. Among the many improvements was more power for the gasoline engines. The Vortec 7400 big block V8 has a 107.95 mm bore, 101.6 mm stroke, produces 290 hp (216 kW) at 4000 rpm.

The Vortec 8100 (RPO L18) is a V8 truck engine. It is a redesigned Chevrolet Big-Block engine and was introduced with the 2001 full-size pickup trucks. It is an all-iron engine (block and heads) with two valves per cylinder. Power output ranges from 225 hp to 340 hp and torque of 350 ft·lb. Vortec 8100s are built in Tonawanda, New York. The Vortec 8100 is the engine used in the largest UHaul, their 26 foot truck.
L18 Applications:

* Chevrolet Silverado/GMC Sierra 2500HD & 3500 (option)
* Chevrolet Suburban/GMC Yukon XL (option)
* Chevrolet Express 3/4 or 1 ton
* Chevrolet Avalanche 2500 (option)

This guide should make it easier to determine which engine fits your vehicle. Let us help you decide what version of replacement engines you may need. Call GotEngines.com @ 1-87-268-0664.

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