The GM High Feature engine (also known as the HFV6, and including the 3600 LY7 and derivative LP1) is a family of modern DOHC V6 engines produced by General Motors. The series was introduced in 2004 with the Cadillac CTS and the Holden VZ Commodore.
It is a 60° 24-valve design with aluminum block and heads and sequential multi-port fuel injection. Most versions feature continuously variable cam phasing on both intake and exhaust valves and electronic throttle control. Other features include piston oil-jet capability, forged and fillet rolled crankshaft, sinter forged connecting rods, a variable-length intake manifold, twin knock control sensors and coil-on-plug ignition. It was developed by the same international team responsible for the Ecotec, including the Opel engineers responsible for the 54° V6, with involvement with design and development engineering from Ricardo plc.
GM's Australian auto division Holden produced a HFV6 engine under the name "Alloytec."
History The HFV6 was designed, tested, and produced in a joint program by Holden and Cadillac. A majority of designs into the new alloy construction, transmission pairing, and first use in production were all undertaken in Detroit (and manufactured in St. Catharines, Ontario). Holden was charged with developing smaller engines (Holden 3.2 LP1 and Saab 2.8 Turbo LP9) as well as their own Holden 3.6 and 3.0 HFV6 (called the Alloytec V6) for local models.
Cadillac and Holden both tested variations of these engines in the United States and Australia.
2.8 LP1 A LP1 variant was introduced in the 2005 Cadillac CTS. It was also used on the Chinese 2008 CTS. It has a bore and stroke, sequential multi-port fuel injection and a 10.0:1 compression ratio. The LP1 was built in St. Catharines, Ontario.
Applications: Year(s) Model Power Torque 2004–2006 Buick Royaum (China) @ 6500 rpm @ 3200 rpm 2007–2009 Buick Park Avenue (China) @ 6500 rpm @ 2600 rpm 2005–2007 Cadillac CTS @ 6500 rpm @ 3300 rpm2008-2010 Cadillac CTS @ 6800 rpm @ 3600 rpm 2007–2009 Cadillac SLS (China) @ 6500 rpm @ 3300 rpm
LP9
This engine is also known as a A28NET, Z28NET, Z28NEL or B284.
The LP9 is a 2.8L turbocharged version used for the Saab 9-3, Saab 9-5, and other GM vehicles. It has the same bore and stroke as the naturally aspirated LP1, however the compression ratio is reduced to 9.5:1. The engine is manufactured at Holden's Fishermans Bend engine factory in Port Melbourne, Australia, while GM Powertrain Sweden (formerly Saab Automobile Powertrain) is responsible for turbocharging the engine. Global versions of this engine use the same horsepower rating for both metric and imperial markets – mechanical horsepower – while the Europe-only versions are rated in metric horsepower.
Applications: Year(s) Model Power Torque 2005–2008 Opel/Vauxhall Vectra @ 5500 rpm @ 1900-4500 rpm 2005–2008 Opel/Vauxhall Signum 2006–2008 @ 5500 rpm @ 1900-4500 rpm 2005 Opel/Vauxhall Vectra OPC/VXR 2006–2008 @ 5500 rpm 2006–2009 Cadillac BLS @ 5500 rpm 2006–2008 Saab 9-3 Aero 2009 @ 5500 rpm @ 1900-4500 rpm 2008 Saab 9-3 Turbo X 2008 Saab 9-3 Aero Convertible @ 5500 rpm @ 1900-4500 rpm 2009 @ 5500 rpm @ 1900-4500 rpm
LAU The LAU is GM's new code for the LP9 Turbo engine, its usage starting with the 2010 Cadillac SRX. In 2011, production of the Cadillac SRX with the LAU engine ceased, but the engine remained in use in the Saab 9-4X until 2012, when production of that model came to an end.
Applications: Year(s) Model Power Torque 2010–2011 Cadillac SRX at 5500 rpm at 2000 rpm 2011–2012 Saab 9-4X 2009–2013 Opel/Vauxhall Insignia V6 4x4 @ 5500 rpm @ 1900–4500 rpm 2009–2013 Opel/Vauxhall Insignia OPC/VXR @ 5250 rpm @ 1900–4500 rpm 2010–2012 Saab 9-5 Turbo6 XWD /Aero @ 5500 rpm @ 2000 rpm
3.0 LF1 The LF1 is a version with a bore and stroke of produced between 2010 and 2014, equipped with spark ignition direct injection (SIDI) and a 11.7:1 compression ratio.
Applications: Year(s) Model Power Torque 2010 Buick LaCrosse @ 6950 rpm @ 5600 rpm 2010–2012 Buick Park Avenue (China) @ 6700 rpm @ 2900 rpm 2010–2011 Cadillac CTS @ 7000 rpm @ 5700 rpm 2011–2013 Cadillac SLS (China) @ 7000 rpm @ 5600 rpm 2010–2011 Cadillac SRX @ 6950 rpm @ 5100 rpm 2011 Saab 9-4X 2010–2012 Chevrolet Equinox @ 6950 rpm @ 5100 rpm 2010–2012 GMC Terrain 2010 Holden VE Commodore @ 6700 rpm @ 2900 rpm2011-2012 Opel Antara @ 6900 rpm- 2011 Chevrolet Captiva @ 6900 rpm @ 5800 rpm 2012 Chevrolet Malibu (Middle East) @ 6900 rpm @ 5600 rpm
LFW The LFW is a flexible fuel version of the LF1, capable of running on E85, gasoline, or any mixture of the two. Output is identical to the LF1.
Applications: Year(s) Model Power Torque 2010–2017 Holden VE Commodore and Holden VF Commodore @ 6800 rpm @ 5200 rpm 2010-2016 Buick GL8 (China only) 2011–2012 Chevrolet Equinox @ 6950 rpm @ 5100 rpm 2011–2012 GMC Terrain 2012–2013 Chevrolet Captiva Sport 2012–2013 Cadillac CTS @ 7000 rpm @ 5700 rpm
3.2
Holden has built its own version of the High Feature engine in Australia produced between 2005 and 2010 with a bore and stroke of . Branded with the Alloytec name like the 3.6L version, this version produces at 6600 rpm and at 3200 rpm. It has a 10.3:1 compression ratio. Its fuel economy is in city, and on highway.. Holden also produced the 3.2L engines that were used by Alfa Romeo as the basis of its JTS V6 engine.
Applications: 2006-2010 Daewoo Winstorm / Chevrolet Captiva / Holden Captiva 2006-2010 Opel Antara / Daewoo Winstorm MaXX / Holden Captiva MaXX 2008-2012 Suzuki Grand Vitara
3.6
LY7 The LY7 engine was developed primarily by Holden and introduced in the 2004 Holden VZ Commodore and 2004 Cadillac CTS sedan. It has a 10.2:1 compression ratio, sequential multi-port fuel injection, and a bore and stroke of . Lower-powered versions only have variable cam phasing on the inlet cam (LE0). Selected models also include variable exhaust. The engine weighs as installed.
This engine was produced in several locations: St. Catharines (Ontario), Flint Engine South (Michigan), Melbourne (Australia), Ramos Arizpe (Mexico), and Sagara (Japan) by Suzuki.
Suzuki's engine designation is N36A.
The dual-fuel LW2 version was able to run on petrol and autogas. The LW2 engine was based on the low-output LE0 V6. It featured a factory-fitted dual-fuel system developed by IMPCO, different valves, and hardened titanium valve seats. This motor was available exclusively in Holden vehicles from 2005–2012.
Applications: Year(s) Model Power Torque 2004–2007 Buick Rendezvous CXL/Ultra @ 6000 rpm @ 3500 rpm 2004–2007 Cadillac CTS @ 6200 rpm @ 2800 rpm 2008–2009 @ 6200 rpm @ 3100 rpm 2004–2005 Holden VZ Commodore @ 6000 rpm @ 2800 rpm 2006–2007 @ 6000 rpm2004–2009Cadillac SRX @ 6500 rpm @ 2800 rpm 2004–2006 Holden VZ Commodore Holden WL Statesman, VZ Calais, VZ SV6 @ 3200 rpm 2006–2007 @ 3200 rpm 2005–2007 Cadillac STS @ 3200 rpm 2005–2008 Buick LaCrosse CXS @ 6000 rpm @ 2000 rpm 2006–2007 Holden VE Commodore Omega @ 2600 rpm 2008–2009 @ 6500 rpm @ 2400 rpm 2006–2011 Holden Rodeo/Colorado @ 6500 rpm @ 2600 rpm 2006–2009 Holden WM Statesman/Caprice @ 6500 rpm @ 2600 rpm 2007–2009 Buick Park Avenue (China) @ 6600 rpm @ 2800 rpm 2007–2009 Cadillac SLS (China) @ 6500 rpm @ 3200 rpm 2007 Pontiac G6 GTP @ 6300 rpm @ 3200 rpm 2007–2009 Saturn Aura XR 2008–2012 Chevrolet Malibu 2008–2009 Pontiac G6 GXP 2007–2008 Saturn Outlook XE single exhaust @ 6600 rpm @ 3200 rpm 2007–2008 Saturn Outlook XR dual exhaust @ 6600 rpm @ 3200 rpm2007–2008GMC Acadia 2008 Buick Enclave 2007–2013 Chevrolet Caprice @ 6500 rpm @ 2600 rpm2007–2009Suzuki XL-7 @ 6500 rpm @ 2300 rpm 2008–2009 Chevrolet Equinox Sport @ 6500 rpm @ 2300 rpm 2008–2009 Pontiac Torrent GXP 2008–2009 Pontiac G8 @ 6300 rpm @ 2100 rpm 2008–2009 Saturn Vue XR / Red Line @ 6500 rpm
LLT The LLT is a direct injected version based on the earlier LY7 engine. It was first unveiled in May 2006, and the DI version was claimed to have 15% greater power, 8% greater torque, and 3% better fuel economy than its port-injected counterpart. The LLT engine has a compression ratio of 11.3:1, and has been certified by the SAE to produce at 6300 rpm and of torque at 5200 rpm on regular unleaded (87 octane) gasoline. This engine debuted on the 2008 Cadillac STS and CTS. GM used an LLT in all 2009–2017 Lambda-derived crossover SUVs to allow class-leading fuel economy in light of the new Corporate Average Fuel Economy (CAFE) standards. In these crossovers, the LLT engine produced up to and of torque.
Applications: Year(s) Model Power Torque 2008–2011 Cadillac CTS @ 6400 rpm @ 5200 rpm 2008–2011 Cadillac STS @ 6300 rpm @ 5200 rpm 2009–2017 Chevrolet Traverse single exhaust @ 6300 rpm @ 3400 rpm 2009 Saturn Outlook single exhaust 2009–2017 Chevrolet Traverse dual exhaust @ 6300 rpm @ 3400 rpm 2009 Saturn Outlook dual exhaust 2009–2017 Buick Enclave 2009–2016 GMC Acadia 2009–2011 Daewoo Veritas @ 6600 rpm @ 2800 rpm 2009–2011 Holden VE Commodore SV6 @ 6400 rpm @ 2900 rpm 2009–2011 Holden WM Statesman/Caprice 2010–2011 Buick LaCrosse CXS @ 6400 rpm @ 5200 rpm 2010–2011 Chevrolet Camaro @ 6400 rpm @ 5200 rpm 2010–2011 Cadillac SLS (China) @ 6400 rpm @ 5200 rpm
LFX The LFX is an enhanced version of the LLT engine developed jointly by Holden and Cadillac. Introduced in the 2012 Holden VE Commodore SV6 and the 2012 Chevrolet Camaro LS/LT, it is lighter than the LLT, thanks to a redesigned cylinder head, integrated exhaust manifold, and composite intake manifold. Other components like the timing chains, fuel injectors, intake valves, and fuel pump have also been updated. They also updated the cam phasing and variable valve timing system compared to the LLT. Power and torque are up slightly from the LLT. The compression ratio is 11.5:1. The LFX also features E85 flex-fuel capability.
Applications: Year(s) Model Power Torque Dyno chart2011–2015Holden WM II/WN Caprice @ 6700 rpm @ 2800 rpm2011–2013Holden VE II Commodore (MY 2012)2013–2017Holden VF Commodore 2012–2016 Buick LaCrosse @ 6800 rpm @ 5300 rpm link 2012–2014 Cadillac CTS (2014 Wagon & Coupe only) @ 6800 rpm @ 4900 rpm link 2012–2015 Cadillac CTS (2012 - 2013 Sedan Performance Trim only) @ 6800 rpm @ 4900 rpm link 2013–2015 Cadillac ATS @ 4800 rpm link 2012–2016 Cadillac SRX @ 6800 rpm @ 2400 rpm link 2012–2015 Chevrolet Camaro @ 6800 rpm @ 4800 rpm link 2012–2017 Chevrolet Caprice PPV @ 6700 rpm @ 4800 rpm link2012–2016Chevrolet Impala/Impala Limited @ 6500 rpm @ 5300 rpm 2013–2019 Cadillac XTS @ 6800 rpm @ 5200 rpm link 2013–2017 Chevrolet Equinox @ 6500 rpm @ 4800 rpm link 2013–2017 GMC Terrain link 2014–2020 Chevrolet Impala @ 6500 rpm @ 5300 rpm link2015–2016Chevrolet Colorado @ 6800 rpm @ 4000 rpmlinkGMC Canyonlink
LWR The LWR is dedicated LPG 3.6-liter engine. Introduced in the MY 2012 Holden VE Commodore, Based on the 3.6-litre LY7 engine, the LWR had a vapour injection system. The vapour injection system injected gas directly into the air intake runner, thereby preventing excess gas from circulating through the air intake system. Although liquid LPG injection generally produces more power, Holden justified vapour injection on the grounds of lower fuel consumption, lower emissions, reduced pumping and parasitic losses, and start-up reliability in hot weather.
The dedicated LPG LWR engine produced peak power and torque of at 6000 rpm and at 2000 rpm. The LWR engine was mated to GM's six-speed 6L45 automatic transmission and, over the combined ADR 81/02 test cycle, the Commodore Omega achieved fuel consumption of – an improvement of 1.6 L/100 km compared to its dual-fuel LW2 predecessor. Furthermore, the LWR engine exceeded Euro 6 emissions standards. Specially hardened valves and valve seats. A redesigned cylinder head and manifold for improved air flow. Variable exhaust valve timing (the LW2 engine only had variable intake valve timing) Specially-developed fuel injectors.