GM Vortec engine

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Family Type RPO Name Displacement
L cu in cc
122 I4 L43 2200 2.2 134 2189[1]
LN2 2200 2.2 134 2189[2]
Atlas LK5 2800 2.8 169 2770[3]
LLV 2900 2.9 178 2921[4]
I5 L52 3500 3.5 211 3460[5]
LLR 3700 3.7 223 3651[6]
I6 LL8 4200 4.2 254 4160[7]
Gen. I-E V6 LB4 4300 4.3 262 4300
L35 4300 4.3 262 4300[8]
LF6 4300 4.3 262 4300
LU3 4300 4.3 262 4300[9]
LG3 4300 4.3 262 4300
V8 L30 5000 5.0 305 5012[10]
L31 5700 5.7 350 5733[10]
Gen. III LR4 4800 4.8 293 4807[11]
L33 5300 5.3 325 5328[12]
LM7 5300 5.3 325 5328[13]
LM4 5300 5.3 325 5328
L59 5300 5.3 325 5328[13]
LQ4 6000 6.0 364 5964[14]
LQ9 HO 6000 6.0 364 5964[15]
Gen. IV LY2 4800 4.8 293 4807[16]
LH6 5300 5.3 325 5328
LY5 5300 5.3 325 5328
LMG 5300 5.3 325 5328[17]
LC9 5300 5.3 325 5328
LH8 5300 5.3 325 5328
L76 6000 6.0 364 5967[18]
LY6 6000 6.0 364 5967[19]
LFA 6000 6.0 364 5967
L92 6200 6.2 376 6162[20]
Big-Block L21 7400 7.4 454 7439
L29 7400 7.4 454 7439[10]
L18 8100 8.1 496 8128[21]

Vortec is a trademarked name for a line of piston engines for General Motors trucks. The name first appeared in 1986 on a 4.3 L V6 but is now used on a wide range of different engines. Modern Vortec engines are named for their approximate displacement in cubic centimeters.



The Vortec 2200 (RPO codes L43 and LN2) is a OHV straight-4 truck engine. It is entirely different from the Iron Duke. The 2200 uses an iron block and aluminum 2-valve pushrod cylinder head. Output is 120 hp (89 kW) and 140 ft·lb (190 N·m). Displacement is 2.2 L (2189 cc, 134 cu in) with an 89 mm (3.5 in) bore and 88.00 mm (3.465 in) stroke. 2200s were built in Tonawanda, New York.

LN2 applications:


The Vortec 2800, or LK5, is a DOHC 2.8 L straight-4 in the GM Atlas engine family. It produces 175 hp (130 kW) and 185 ft·lb (251 N·m) of torque. The Vortec 2800 is standard equipment on the Chevrolet Colorado and GMC Canyon. It is mated to either a 5-speed manual transmission built by Aisin, or a GM 4-speed Hydra-matic automatic transmission.


The Vortec 2900, or LLV, is a DOHC 2.9 L straight-4 in the GM Atlas engine family. Displacement is increased from the Vortec 2800 it replaces to produce 185 hp (138 kW) and 195 ft·lbf (263 N·m) of torque. First used in the 2007 Chevy Colorado, 2007 GMC Canyon, and 2007 Isuzu i-290.



The Vortec 3500, or L52, is a DOHC 3.5 L straight-5 in the GM Atlas engine family. It produces 220 hp (164 kW) and 225 ft·lb (305 N·m) of torque. The Vortec 3500 is optional on Chevy Colorado / GMC Canyon regular and extended cab trucks. It is standard on the Crew Cab Colorado/Canyon, and the Hummer H3.


The Vortec 3700, or LLR, is a DOHC 3.7 L straight-5 in the GM Atlas engine family. Introduced in 2007, the engine has increased in displacement from 3.5 L (211 cu in) in the Vortec 3500 to 3.7 L (223 cu in), producing 242 hp (180 kW) and 242 ft·lbf (327 N·m) of torque. This engine is only offered with the HydraMatic 4L60e automatic trannsmission in the Chevrolet Colorado, GMC Canyon, Hummer H3, and Isuzu i-370 trucks.



The Vortec 4200, or Atlas LL8, is a 4.2 L straight-6 in the GM Atlas engine family. It has four valves per cylinder and is a double-overhead cam (DOHC) design. Introduced in 2002 for the Chevrolet TrailBlazer, GMC Envoy, and Oldsmobile Bravada, the engine is also in use in the Buick Rainier, Saab 9-7, and the Isuzu Ascender. The engine was rated at 275 hp (205 kW) and 275 ft·lbf (373 N·m) until the 2007 model year when the GMT360 platform received an increase to 291 hp (217 kW) and 277 ft·lbf (376 N·m). The Vortec I6 engine was on the Ward's 10 Best Engines list every year since its introduction in 2002 through 2005.



The Vortec 4300 is a 90° V6 truck engine, replacing the Chevrolet 250 in light trucks and 200 cu in (3.3 L) and 229 cu in (3.8 L) 90-degree V6s in passenger cars. The 4300 is based on the 350 cu in (5.7 L) Chevrolet small-block V8, and first appeared in 1985 with the throttle-body injected LB4 in passenger cars; light trucks and vans used Quadrajet carburetors for 1985. In 1991, the limited-edition GMC Syclone featured a 280 hp (210 kW) and 350 lb·ft (475 N·m) turbocharged and intercooled LB4 with the first use of multi-point fuel injection on a Vortec V6. The central-port injected L35 (Vin 'W') debuted in 1992; the cylinder block was slightly changed, a balance shaft was added to remove minor vibrations, and better breathing yielded 200 horsepower (150 kW). Another CPI engine, the LF6, joined in 1996 with the introduction of Vortec cylinder heads, while the LB4 was retired after 1998. In 2002, GM introduced a new multi-point injected LU3 engine, and a LG3 variant appeared soon after. This engine's origins date back to 1955, when the original Chevy small-block V-8 was introduced.

All Vortec 4300s use a cast iron block and heads and 4 in (101.60 mm) bore and 3.48 in (88.39 mm) stroke, both of which are the same as a 350, which gives them a displacement of 262.39 cubic inches (4,299.8 cc). Connecting rods still measure 5.7 in (144.78 mm) although the rod journal diameter is 2.25 in (57.15 mm). 1992 and later cylinder blocks used a different timing cover since these engines used a balance shaft (some 1992 production cylinder blocks for the LB4 with TBI induction used the 'traditional' front timing chain cover from the small block Chevrolet). They are OHV engines with two valves per cylinder and are produced in Tonawanda, New York and Romulus, Michigan. Power output of the new LU3/LG3 engines is 180 hp (130 kW) to 200 hp (150 kW) and 245 lb·ft (332 N·m) to 260 lb·ft (353 N·m).

4300 applications:

LU3 applications:

LB4 applications:

  • 1991 GMC Syclone
  • 1992–1993 GMC Typhoon




The Vortec 4800 LR4 is a Generation III small block V8 truck engine. Displacement is 4.8 L (≈293 cu in) with a 96.01 mm bore and 83 mm stroke. It is the smallest of the Generation III Vortec truck engines and was the replacement for the 5.0 L 5000 L30. The LR4 produces 270 horsepower (200 kW) to 295 horsepower (220 kW) and 285 lb·ft (386 N·m) to 305 lb·ft (414 N·m), depending on the model year and application. LR4s are manufactured at St. Catharines, Ontario and Romulus, Michigan.

LR4 applications:


The Vortec 4800 LY2 is a Generation IV small block V8 truck engine. Like its LR4 predecessor, it gets its displacement from a 96.01 mm bore and 83 mm stroke. The smallest member of the Generation IV Vortec engine family, it is unique in that it is the only member of that family that does not feature either variable valve timing or Active Fuel Management. It is rated at 295 hp (220 kW) and 305 ft·lbf (414 N·m) of torque for all applications.

LY2 applications:


The Vortec 5000 L30 is a V8 truck engine. Displacement is 5.0 L. It is a based on the Generation I small-block from Chevrolet. It was replaced by the 4.8 L 4800 LR4 for the 2003 full-size vans. In Van configuration it produces 230 horsepower (170 kW) Net Flywheel at 4,600 rpm and 290 Net Flywheel Torque at 2,800 rpm. The engine uses a hydraulic roller cam and high flowing, fast burn style vortec heads. Differences include bore and stroke, intake valve size, and smaller combustion chambers. L30 applications:


Generation III

The Vortec 5300, or LM7/LM4/L59/L33, is a V8 truck engine. It is a stroked (by 9 mm) version of the Vortec 4800 and replaced the 5700 L31. L59 denoted a flexible fuel version, while the LM7 was the standard version of the engine.

Power output is 285-295 hp (213-220 kW) and torque is 325 lb·ft (441 N·m) to 335 lb·ft (454 N·m). Displacement is 5.3 L (5328 cc (325 cu in)) from 96.01 mm bore and 92.00 mm stroke. Vortec 5300s are built in St. Catharines, Ontario, Romulus, Michigan, and Silao, Mexico.


The LM7 Vortec 5300 was introduced in 1999, and can be considered the "garden variety" version of the Generation III 5.3 liter V8's.

LM7 applications:


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:


The L33 was an aluminum block version of the LM7, and was referred to as the Vortec 5300 HO in marketing materials. Power increased by 15 hp (11 kW), to 310 hp (230 kW), over the LM7, and torque was unchanged. It was only available on extended cab 4WD pickup trucks.

L33 applications:


The L59 Vortec 5300 was introduced in 2002, and was a flexible fuel version of the LM7. Power and torque ratings matched that of the LM7.

L59 applications:

Generation IV

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.


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:


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 (239 kW) and 340 ft·lbf (461 N·m) of torque; for pickup truck applications, it is rated at 315 hp (235 kW) and 338 ft·lbf (458 N·m) of torque.

LY5 applications:


The LMG Vortec 5300 is the flexible-fuel version of the LY5. Power and torque ratings for SUV and pickup truck applications are the same as each application's LY5 rating.

LMG applications:


The LC9 Vortec 5300 is the Flex-Fuel version of the LH6, and is found in 4WD models. SUV applications are rated at 310 hp (231 kW) and 335 ft·lbf (454 N·m) of torque.

LC9 applications:


The LH8 Vortec 5300 is a variant of the 5.3 L Gen IV small block V8 modified to fit in the engine bay of the GMT 345 SUV and GMT 355 trucks. It produces 300 hp (220 kW) at 5200 rpm and 320 lb·ft (434 N·m) at 4000 rpm. It has a displacement of 5328 cc (325 cu in). [22]

LH8 applications:


The Vortec 5700 L31 is a V8 truck engine. Displacement is 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. As such, the L31 head is compatible with all older small-blocks, and is a very popular upgrade. 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 produces 255 horsepower (190 kW) and 330 ft·lbf (450 N·m) of torque. 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
  • 1996-1999 Chevrolet/GMC 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

TBI L31 applications

  • 1996 G-Series vans over 8,500 GVW w/ 4L80E transmission

Special applications

  • Oscar Mayer Wienermobile
  • Isuzu Box Trucks


HO 6000 engine in a 2003 Cadillac Escalade EXT

Generation III


The Vortec 6000, or LQ4, is a V8 truck engine. It is a bored version of the Vortec 5300. Displacement is 6.0 L (≈366 cu in) from 101.6 mm bore and 92 mm stroke. It is an iron/aluminum (2000 model year engines had cast iron heads) design and produces 300 horsepower (220 kW) to 325 horsepower (242 kW) and 360 lb·ft (488 N·m) to 370 lb·ft (502 N·m). 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 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 (7.5 kW) and 10 ft·lbf (14 N·m), bringing output to 345 hp (257 kW) and 380 ft·lb (515 N·m). LQ9s are built only in Romulus, Michigan. GM also listed it as based on LS architecture.[1]

LQ9 Applications:

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:

See also the automotive L76

The Vortec 6000 L76 is a Generation IV aluminum 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 and 375 ft·lb (495 N·m) at 4400 rpm. Production started in late 2006.

L76 applications:


The Vortec 6000 LFA is a Generation IV small block V8 truck engine. The LFA variant is used in the GM's hybrid GMT900 trucks and SUVs. Major features include Active Fuel Management, a late-intake valve timing system, and a higher 10.8:1 compression ratio. It produces 332 hp at 5100 rpm and 367 lb·ft (498 N·m) at 4100 rpm.

LFA applications:


The 2007 Cadillac Escalade has a 6.2 L Vortec 6200 (RPO L92) (≈378 cu in) 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 380 hp (301 kW) and 417 ft·lb (565 N·m) in the GMC Yukon Denali/XL Denali and in the GMC Sierra Denali, and rated at 403 hp (301 kW) and 415 ft·lbf (563 N·m) (441hp with 95 octane export version) in the Hummer and in the Cadillac Escalade.



The Vortec 7400 (RPO L29)(≈452 cu in) 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.

L29 Applications:

  • 1996-2000 Chevrolet Silverado/GMC Sierra GMC Sierra Classic 2500HD & 3500 (option)
  • 1996-1999 Chevrolet Suburban 2500/GMC Suburban 2500 (option)
  • 1996-2000 Chevrolet Express 3/4 or 1 ton

The 7.4 L (454 cu in) 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 horsepower (220 kW) at 4000 rpm and 410 lb·ft (556 N·m) at 3200 rpm.

The Vortec 7400 (RPO L21) was a Commercial version of the Chevrolet Big-Block engine used in the Medium Duty truck platform and Workhorse Custom Chassis. It shares the much from the L29 454, with the addition of forged pistons and crankshaft. It has slightly reduced hp/torque than the L29 454 and uses a different PCM than the light duty trucks did. And was used with the early 4 speed Allison automatic transmission or manual transmission depending on application.

L21 Applications:

  • 1998-2001 GMC Kodiac 4500 5500
  • 1998-1999 Chevrolet Suburban 2500/GMC Suburban 2500 (option)
  • 1998-2000 Chevrolet Express 3/4 or 1 ton

1998-2001 Kodiak/Topkick 1998-2001 P21 Workhorse Chassis


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 retains the same bore centers as the old 7.4 L big-blocks, but stroke was upped by 9.4 mm to reach 8.1L (496cuin) for a total of 107.95 mm bore and 111 mm stroke. It is an all-iron engine (block and heads) with two valves per cylinder. Power output ranges from 225 hp (168 kW) to 340 horsepower (250 kW) and torque from 350 lb·ft (475 N·m) to 455 lb·ft (617 N·m). Vortec 8100s are built in Tonawanda, New York. The Vortec 8100 is the engine used in the largest Uhaul, their 26-foot (7.9 m) truck. GM stopped installing big block V-8's in the Silverado HD trucks, when the GMT-800 series was discontinued in 2007.

L18 Applications:

See also


  10. 10.0 10.1 10.2
  13. 13.0 13.1