# General Motors Atlas engine > Mediated Wiki article. Canonical URL: https://mediated.wiki/source/General_Motors_Atlas_engine > Markdown URL: https://mediated.wiki/source/General_Motors_Atlas_engine.md > Source: https://en.wikipedia.org/wiki/General_Motors_Atlas_engine > Source revision: 1349707131 > License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) Reciprocating internal combustion engine General Motors Atlas Overview Manufacturer General Motors Corporation Also called Vortec Production 2002–2012 Layout Configuration Straight-4, Straight-5, and Straight-6 Displacement 2.8 L (2,770 cc; 169.0 cu in) 2.9 L (2,921 cc; 178.3 cu in) 3.5 L (3,460 cc; 211.1 cu in) 3.7 L (3,653 cc; 222.9 cu in) 4.2 L (4,160 cc; 253.9 cu in) Cylinder bore 93 mm (3.66 in) 95.5 mm (3.76 in) Piston stroke 102 mm (4.02 in) Cylinder block material Aluminum Cylinder head material Aluminum Valvetrain DOHC 4 valves x cyl. with VVT (Exhaust Cam) Compression ratio 10.0:1 RPM range Max. engine speed 6,300 rpm Combustion Fuel system Multi-point fuel injection Fuel type Gasoline Oil system Wet sump Cooling system Water-cooled Output Power output 175–291 hp (130–217 kW) Torque output 185–277 lb⋅ft (251–376 N⋅m) Chronology Predecessor Chevrolet Turbo-Thrift engine General Motors 122 engine **Atlas** is a name for a family of [inline](/source/Straight_engine) [piston engines](/source/Piston_engine) for [trucks](/source/Truck) from [General Motors](/source/General_Motors), used in the [GMT355](/source/GMT355) and [GMT360](/source/GMT360) platforms. The series debuted in 2002 with the [Oldsmobile Bravada](/source/Oldsmobile_Bravada), and is used in the [Buick Rainier](/source/Buick_Rainier), the [Chevrolet TrailBlazer](/source/Chevrolet_TrailBlazer) and [Colorado](/source/Chevrolet_Colorado), the [GMC Envoy](/source/GMC_Envoy) and [Canyon](/source/GMC_Canyon), the [Hummer H3](/source/Hummer_H3), [Isuzu Ascender](/source/Isuzu_Ascender) and [i-370](/source/Isuzu_i-370), and the [Saab 9-7X](/source/Saab_9-7X). The engines use GM's Vortec name, with [straight-4](/source/Straight-4), [straight-5](/source/Straight-5), and [straight-6](/source/Straight-6) engines all part of the same family, sharing the same manufacturing equipment, rods, pistons, valves, and other parts. They feature [coil-on-plug ignition](/source/Coil-on-plug_ignition) systems,[1] [variable valve timing](/source/Variable_valve_timing) on the [exhaust](/source/Exhaust_manifold) side, [electronic throttle control](/source/Electronic_throttle_control), and a special oil pan with a pass-through for the [half shafts](/source/Half_shaft) in [four-wheel drive](/source/Four-wheel_drive) vehicles. The inclusion of VVT on the exhaust camshaft side allows the Atlas series to meet emissions standards without the use of [EGR](/source/Exhaust_gas_recirculation), simplifying the engine design and increasing power for a broad power curve. The LL8 shares 75% of its components with the LK5 and L52; while the LK5 and L52 share 89% of their components.[2] The Atlas engines feature aluminum cylinder blocks and heads, with the cylinder bores featuring replaceable steel [cylinder liners](/source/Cylinder_liner).[1] The 4- and 5-cylinder versions feature dual balance shafts,[3][4] which are unnecessary in the 6-cylinder.[5] The Atlas program began in 1995 along with the planning for GM's next-generation mid-size [SUVs](/source/Sport_utility_vehicle) and [pickup trucks](/source/Pickup_truck). These vehicles were designed around the I6 engine. The I6 version was used in a [Baja 1000](/source/Baja_1000) racing truck, winning its first race in a class that also included [V8 engines](/source/V8_engine). Another I6-powered truck won the truck class at the [Pikes Peak International Hillclimb](/source/Pikes_Peak_International_Hillclimb). The Atlas engines were produced at the [Flint Engine South](/source/Flint_Engine_South) plant in [Flint, Michigan](/source/Flint%2C_Michigan), while the I4 and I5 versions were produced at the [Tonawanda Engine plant](/source/Tonawanda_Engine) in [Tonawanda, New York](/source/Tonawanda_(town)%2C_New_York), near [Buffalo](/source/Buffalo%2C_New_York). ## LL8 (Vortec 4200) 2006 LL8 (Vortec 4200) engine in 2006 Chevrolet TrailBlazer The **LL8** (or **Vortec 4200**), is a [straight-6](/source/Straight-6) gasoline engine produced from 2002 to 2009. It was the first Atlas engine, and was introduced in 2002 for the [Chevrolet TrailBlazer](/source/Chevrolet_TrailBlazer), [GMC Envoy](/source/GMC_Envoy), and [Oldsmobile Bravada](/source/Oldsmobile_Bravada). The engine was also used in the [Buick Rainier](/source/Buick_Rainier), [Saab 9-7X](/source/Saab_9-7X), and [Isuzu Ascender](/source/Isuzu_Ascender). It displaces 4.2 L (4,160 cc; 253.9 cu in), with a 93 mm × 102 mm (3.66 in × 4.02 in) bore and stroke. It has four valves per cylinder, dual-overhead cams ([DOHC](/source/DOHC)), and [variable valve timing](/source/Variable_valve_timing) on the exhaust cam, a first for GM inline engines. When introduced, this engine's power was 270 hp (201 kW) at 6,000 [rpm](/source/Revolutions_per_minute) and torque was 275 lb⋅ft (373 N⋅m) at 3,600 rpm. 2003 saw a slight bump in power to 275 hp (205 kW), while torque was unchanged. For 2006, power was increased to 291 hp (217 kW) at 6,000 rpm and torque to 277 lb⋅ft (376 N⋅m)) at 4800 rpm with the addition of a [MAF](/source/Mass_flow_sensor#Hot_wire_sensor_(MAF)) and a complete internal redesign of the engine; however, due to the new [SAE](/source/SAE_viscosity_number) rating procedures, ratings can vary slightly between years. The engine redline is 6,300 rpm. The **LL8** was on the [Ward's 10 Best Engines](/source/Ward's_10_Best_Engines) list for 2002 through 2005 and was the basis for all the other **Atlas** engines. With the closure of the [Moraine, Ohio](/source/Moraine%2C_Ohio), plant and the discontinuation of the [GMT360](/source/GMT360) platform (Chevrolet TrailBlazer, GMC Envoy, etc.), production of the **LL8** also ended.[6] Applications: - 2002–2009 [GMC Envoy](/source/GMC_Envoy), *Envoy XL*, and *Envoy XUV* - 2002–2009 [Chevrolet TrailBlazer](/source/Chevrolet_TrailBlazer) and *TrailBlazer EXT* - 2002–2004 [Oldsmobile Bravada](/source/Oldsmobile_Bravada) - 2004–2007 [Buick Rainier](/source/Buick_Rainier) - 2003–2008 [Isuzu Ascender](/source/Isuzu_Ascender) - 2005–2009 [Saab 9-7X](/source/Saab_9-7X) 4.2i ## LLR (Vortec 3700) The **LLR** (also called **Vortec 3700**), is a [straight-5](/source/Straight-5) [DOHC](/source/DOHC) engine produced from 2007 through 2012. It displaces 3.7 L (3,653 cc; 222.9 cu in), courtesy of a larger 95.5 mm (3.76 in) bore while keeping the 102 mm (4.02 in) stroke. The **LLR** also corrected the head issue found in the *L52*. It produces 242 hp (180 kW) at 5,600 [rpm](/source/Revolutions_per_minute) and 242 lb⋅ft (328 N⋅m) at 4,600 rpm. The engine redline is 6,300 rpm.[6] Applications: - 2007–2012 [Chevrolet Colorado](/source/Chevrolet_Colorado) and [GMC Canyon](/source/GMC_Canyon) - 2007–2010 [Hummer H3](/source/Hummer_H3) - 2007–2008 [Isuzu i-370](/source/Isuzu_i-370) ## L52 (Vortec 3500) GMC Canyon Vortec 3500 engine The **L52** (also called **Vortec 3500**), is a [straight-5](/source/Straight-5) [DOHC](/source/DOHC) engine produced from 2004 through 2006. It displaces 3.5 L (3,460 cc; 211.1 cu in), with a 93 mm × 102 mm (3.66 in × 4.02 in) bore and stroke. [Dynoed](/source/Dynamometer) at the [flywheel](/source/Flywheel) it produces 220 hp (164 kW) at 5,600 [rpm](/source/Revolutions_per_minute) and 225 lb⋅ft (305 N⋅m) at 2,800 rpm. The engine redline is 6,300 rpm.[4] Applications: - 2002 [Bel Air](/source/Chevrolet_Bel_Air#2002_concept) concept - 2004–2006 [Chevrolet Colorado](/source/Chevrolet_Colorado) and GMC Canyon - 2006 [Isuzu i-350](/source/Chevrolet_Colorado#Isuzu_i-series) - 2006 [Hummer H3](/source/Hummer_H3) ## LLV (Vortec 2900) The **LLV** (also called **Vortec 2900**) is a 2.9 L; 178.3 cu in (2,921 cc) [straight-4](/source/Straight-4) [DOHC](/source/DOHC) engine produced between 2007 and 2012, with a 95.5 mm × 102 mm (3.76 in × 4.02 in) bore and a stroke. It replaced the **LK5** and produced 185 hp (138 kW) at 5,600 [rpm](/source/Revolutions_per_minute) and 190 lb⋅ft (258 N⋅m) of torque at 2,800 rpm. The engine redline is 6,300 rpm.[7] Applications: - 2007–2012 [Chevrolet Colorado](/source/Chevrolet_Colorado) and [GMC Canyon](/source/GMC_Canyon) - 2007–2008 [Isuzu i-290](/source/Isuzu_i-290) ## LK5 (Vortec 2800) The **LK5** (also called the **Vortec 2800**) is a 2.8 L; 169.0 cu in (2,770 cc) [straight-4](/source/Straight-4) [DOHC](/source/DOHC) engine produced between 2004 and 2006, with a 93 mm × 102 mm (3.66 in × 4.02 in) bore and stroke. It produces 175 hp (130 kW) at 5,600 [rpm](/source/Revolutions_per_minute) and 185 lb⋅ft (251 N⋅m) of torque at 2,800 rpm. The engine redline is 6,300 rpm.[3] Applications: - 2004–2006 [Chevrolet Colorado](/source/Chevrolet_Colorado) and [GMC Canyon](/source/GMC_Canyon) - 2006 [Isuzu i-280](/source/Isuzu_i-280) ## References 1. ^ [***a***](#cite_ref-counterman_1-0) [***b***](#cite_ref-counterman_1-1) ["5 Cylinder Engine - Vortec 3500"](https://www.counterman.com/tech-feature-straight-look-vortec-3500-straight-five-engine/). Retrieved 2011-10-13. 1. **[^](#cite_ref-2005_GM_2-0)** ["Improved Performance and Efficiency Highlight a Robust Powertrain Lineup for '05"](https://web.archive.org/web/20100108030402/http://archives.media.gm.com/division/2005_prodinfo/powertrain/index.html). Archived from [the original](http://archives.media.gm.com/division/2005_prodinfo/powertrain/index.html) on 2010-01-08. 1. ^ [***a***](#cite_ref-2006_LK5_3-0) [***b***](#cite_ref-2006_LK5_3-1) ["2006 Vortec 2800 2.8L I-4 (LK5)"](https://web.archive.org/web/20160109064824/http://archives.media.gm.com/us/powertrain/en/product_services/2006/Spec%20Sheets/Line%20456/2006%20Line%20I4%20Truck%20(LK5).pdf) (PDF). Archived from [the original](http://archives.media.gm.com/us/powertrain/en/product_services/2006/Spec%20Sheets/Line%20456/2006%20Line%20I4%20Truck%20(LK5).pdf) (PDF) on 2016-01-09. 1. ^ [***a***](#cite_ref-2006_L52_4-0) [***b***](#cite_ref-2006_L52_4-1) ["2006 Vortec 3500 3.5L I-5 (L52) Spec Sheet"](https://web.archive.org/web/20160109064824/http://archives.media.gm.com/us/powertrain/en/product_services/2006/Spec%20Sheets/Line%20456/2006%20Line%20I5%20Truck%20(L52).pdf) (PDF). Archived from [the original](http://archives.media.gm.com/us/powertrain/en/product_services/2006/Spec%20Sheets/Line%20456/2006%20Line%20I5%20Truck%20(L52).pdf) (PDF) on 2016-01-09. 1. **[^](#cite_ref-5)** [*6 Cylinder Engine - Straight Six - Explained*](https://www.youtube.com/watch?v=w5NZsc1oQpU), 21 May 2014, retrieved 2023-06-17 1. ^ [***a***](#cite_ref-2007_LL8_6-0) [***b***](#cite_ref-2007_LL8_6-1) [2007 LLR Spec Sheet](https://web.archive.org/web/20111027073341/http://archives.media.gm.com/us/powertrain/en/product_services/2007/Spec%20Sheet/Line%20456/2007_LL8.xls) 1. **[^](#cite_ref-2007_LLV_7-0)** [2007 LLV Spec Sheet](https://web.archive.org/web/20160109064824/https://archives.media.gm.com/us/powertrain/en/product_services/2007/Spec%20Sheet/Line%20456/2007_LLV.xls) Wikimedia Commons has media related to [General Motors Atlas engine](https://commons.wikimedia.org/wiki/Category:General_Motors_Atlas_engine). v t e « previous — GM engine timeline, 1980–present Type 1980s 1990s 2000s 2010s 2020s 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 Gasoline Flat 4 EJ Inline 3 G S-TEC Family 0 SGE E-Turbo 4 Opel OHV engine GM Ecotec Iron Duke Family 0 Opel CIH Saab H AZ G Quad 4 ZZ ZR Vauxhall Slant-4 A S-TEC Holden Starfire Saturn Atlas MGE Family II SGE Family 1 122 GM L3B X G J 5 Atlas 6 Chevrolet Turbo-Thrift Red Blue Black RB30 Atlas Opel CIH E-TEC V Buick/3800 Chevrolet 90° GM 60° Gen V 90° Shortstar High Value Opel 54° High Feature H J 8 Buick Cadillac OHV Northstar Blackwing High Technology Big Block Small Block Gemini LS/LT Holden Oldsmobile Pontiac Diesel Detroit Oldsmobile Duramax 6 Oldsmobile DMAX Inline M51 Duramax Detroit 60 6H 4 JTD RA Family Z E Circle L Family II Family B A MDE Type 1980s 1990s 2000s 2010s 2020s Legend Italicized engines manufactured by Subaru Toyota Isuzu Suzuki Nissan Honda BMW VM Motori --- Adapted from the Wikipedia article [General Motors Atlas engine](https://en.wikipedia.org/wiki/General_Motors_Atlas_engine) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/General_Motors_Atlas_engine?action=history)). 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