GM High Feature engine


The GM High Feature engine is a family of modern General Motors DOHC V6 engines. The series was introduced in 2004 with the Cadillac CTS and the Holden 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.
Holden sells the HFV6 under the name Alloytec. The High Feature moniker on the Holden produced engine is reserved for the twin cam phasing high output version. The block was designed to be expandable from 2.8 L to 4.0 L. High Feature V6 engines were previously produced in Fishermans Bend, Port Melbourne, Australia and remain in production at the following four manufacturing locations: St. Catharines, Canada; Flint Engine South in Flint, Michigan, United States; Romulus Engine Plant in Romulus, MI and Ramos Arizpe, Coahuila, Mexico. The assembly lines for the St. Catharines and Flint facilities were manufactured by Hirata Corporation at their powertrain facility in Kumamoto, Japan. Most of the designs of this motor happened in Flint. They were first produced for the Cadillac range.

History

The HFV6 was first designed, tested and produced in a joint program by Cadillac and Holden. A majority of designs into the new alloy construction, transmission pairing and first use in production were all undertaken in Detroit. Holden had the job of developing smaller engines as well as their own Holden 3.6 HFV6 for local models.
Cadillac and Holden both tested variations of these engines in US 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:
YearModelPowerTorque
2007–2009Buick Park Avenue @ 6500 rpm @ 2600 rpm
2005–2007Cadillac CTS @ 6500 rpm @ 3300 rpm
2008-2010Cadillac CTS @ 6800 rpm @ 3600 rpm
2007–2009Cadillac SLS @ 6500 rpm @ 3300 rpm

LP9

This engine is also known as a A28NET, Z28NET, Z28NEL or B284.
The LP9 is a 2.8 L 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 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:
YearModelPowerTorque
2005-2008Opel Vectra / Vauxhall Vectra @ 5500 rpm @ 1900-4500 rpm
2005-2008Opel Signum @ 5500 rpm @ 1900-4500 rpm
2006–2008Opel Signum @ 5500 rpm @ 1900-4500 rpm
2005Opel Vectra OPC @ 5500 rpm @ 1900-4500 rpm
2006–2008Opel Vectra OPC @ 5500 rpm @ 1900-4500 rpm
2006–2009Cadillac BLS @ 5500 rpm @ 1900-4500 rpm
2006–2008Saab 9-3 Aero @ 5500 rpm @ 1900-4500 rpm
2009Saab 9-3 Aero @ 5500 rpm @ 1900-4500 rpm
2008Saab 9-3 Turbo X @ 5500 rpm @ 1900-4500 rpm
2008Saab 9-3 Aero Convertible @ 5500 rpm @ 1900-4500 rpm
2009Saab 9-3 Aero Convertible @ 5500 rpm @ 1900-4500 rpm
2009–2013Opel/Vauxhall Insignia @ 5500 rpm @ 1900-4500 rpm
2009–2013Opel/Vauxhall Insignia OPC/VXR @ 5250 rpm @ 1900-4500 rpm
2010–2012Saab 9-5 Turbo6 XWD /Aero @ 5500 rpm @ 2000 rpm
2010–2012Saab 9-5 Hirsch Performance @ 5500 rpm @ 2500 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:
YearModelPowerTorque
2010-2011Cadillac SRX at 5500 rpm at 2000 rpm
2011-2012Saab 9-4X at 5500 rpm at 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 and a 11.7:1 compression ratio.
Applications:
YearModelPowerTorque
2010Buick LaCrosse @ 6950 rpm @ 5600 rpm
2010–2012Buick Park Avenue @ 6700 rpm @ 2900 rpm
2010–2011Cadillac CTS @ 7000 rpm @ 5700 rpm
2011–2013Cadillac SLS @ 7000 rpm @ 5600 rpm
2010–2011Cadillac SRX @ 6950 rpm @ 5100 rpm
2010Chevrolet Equinox @ 6950 rpm @ 5100 rpm
2010GMC Terrain @ 6950 rpm @ 5100 rpm
2010Holden Commodore @ 6700 rpm @ 2900 rpm
2011Saab 9-4X @ 6950 rpm @ 5100 rpm
2011Chevrolet Captiva @ 6900 rpm @ 5800 rpm
2012Chevrolet Malibu @ 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:
YearModelPowerTorque
2011-2017Buick GL8 @ 6800 rpm @ 5200 rpm
2011–2012Chevrolet Equinox @ 6950 rpm @ 5100 rpm
2011–2012GMC Terrain @ 6950 rpm @ 5100 rpm
2012–2013Cadillac CTS @ 7000 rpm @ 5700 rpm
2012–2013Chevrolet Captiva Sport @ 6950 rpm @ 5100 rpm
2010-2017Holden Commodore @ 6800 rpm @ 5200 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 3.6 litre 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 3.2 L engines that were used by Alfa Romeo as the basis of its JTS V6 engine.
Applications:

LY7

The LY7 engine was introduced in the 2004 Cadillac CTS sedan. It has a 10.2:1 compression ratio, a bore and a stroke of. Lower powered versions only have variable cam phasing on the inlet cam. Selected models also include variable exhaust. The engine weighs as installed.
This engine is produced in several locations: St. Catharines, Flint Engine South, Melbourne, Ramos Arizpe, and Sagara by Suzuki.
Suzuki's engine designation is N36A.
A dual fuel version able to run on petrol and autogas has also been produced by Holden in Australia.
Applications:
YearModelPowerTorque
2004–2007Buick Rendezvous CXL/Ultra @ 6000 rpm @ 3500 rpm
2004–2007Cadillac CTS @ 6200 rpm @ 2800 rpm
2008–2009Cadillac CTS @ 6200 rpm @ 3100 rpm
2004–2009Cadillac SRX @ 6500 rpm @ 2800 rpm
2004–2005Holden VZ Commodore @ 6000 rpm @ 2800 rpm
2006–2007Holden VZ Commodore @ 6000 rpm @ 2800 rpm
2004–2006Holden VZ Commodore Holden WL Statesman Holden VZ Calais SV6 @ 6500 rpm @ 3200 rpm
2006–2007Holden VZ Commodore Holden WL Statesman Holden VZ Calais SV6 @ 6500 rpm @ 3200 rpm
2005–2008Buick LaCrosse CXS @ 6000 rpm @ 2000 rpm
2005–2007Cadillac STS @ 6500 rpm @ 3200 rpm
2006–2007Holden VE Commodore Omega @ 6000 rpm @ 2600 rpm
2008–2009Holden VE Commodore Omega @ 6500 rpm @ 2400 rpm
2006–2009Holden WM Statesman/Caprice @ 6500 rpm @ 2600 rpm
2007–2009Buick Park Avenue @ 6600 rpm @ 2800 rpm
2007–2009Cadillac SLS @ 6500 rpm @ 3200 rpm
2006–2011Holden Rodeo/Colorado @ 6500 rpm @ 2600 rpm
2007–2008GMC Acadia @ 6600 rpm @ 3200 rpm
2007Pontiac G6 GTP @ 6300 rpm @ 3200 rpm
2007–2009Saturn Aura XR @ 6300 rpm @ 3200 rpm
2007–2008Saturn Outlook XE single exhaust @ 6600 rpm @ 3200 rpm
2007–2008Saturn Outlook XR dual exhaust @ 6600 rpm @ 3200 rpm
2008Buick Enclave @ 6600 rpm @ 3200 rpm
2008–2012Chevrolet Malibu @ 6300 rpm @ 3200 rpm
2008–2009Chevrolet Equinox Sport @ 6500 rpm @ 2300 rpm
2008–2009Pontiac G6 GXP @ 6300 rpm @ 3200 rpm
2008–2009Pontiac G8 @ 6300 rpm @ 2100 rpm
2008–2009Pontiac Torrent GXP @ 6500 rpm @ 2300 rpm
2008–2009Saturn Vue XR / Red Line @ 6500 rpm @ 2100 rpm
2007-2009Suzuki XL7 at 6500 rpm at 2300 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 percent greater power, 8 percent greater torque, and 3 percent 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 gasoline. This engine debuted on the 2008 Cadillac STS and CTS. GM used a LLT in all 2009 Lambda-derived crossover SUVs to allow class-leading fuel economy in light of the new Corporate Average Fuel Economy standards. In the Lambdas, LLT engine produces and of torque.
Applications:
YearModelPowerTorqueDyno chart
2008–2011Cadillac CTS @ 6400 rpm @ 5200 rpm
2008–2011Cadillac STS @ 6300 rpm @ 5200 rpm
2009–2017Buick Enclave @ 6300 rpm @ 3400 rpm
2009–2017Chevrolet Traverse single exhaust @ 6300 rpm @ 3400 rpm
2009–2017Chevrolet Traverse dual exhaust @ 6300 rpm @ 3400 rpm
2009–2016GMC Acadia
2009Saturn Outlook single exhaust @ 6300 rpm @ 3400 rpm
2009Saturn Outlook dual exhaust @ 6300 rpm @ 3400 rpm
2009–2011Daewoo Veritas
2009–2011Holden VE Commodore SV6 @ 6400 rpm @ 2900 rpm
2009–2011Holden WM Statesman/Caprice @ 6400 rpm @ 2900 rpm
2010–2011Buick LaCrosse CXS @ 6400 rpm @ 5200 rpm
2010-2011Chevrolet Camaro @ 6400 rpm @ 5200 rpm
2010–2011Cadillac SLS @ 6400 rpm @ 5200 rpm

LFX

The LFX is an enhanced version of the LLT engine. Introduced in the MY2012 Chevrolet Camaro LS, it is lighter than the LLT, due to a redesigned cylinder head and integrated exhaust manifold, and composite intake manifold. Other components like the fuel injectors, intake valves, and fuel pump have also been updated. 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:
YearModelPowerTorqueDyno chart
2012–2016Buick LaCrosse @ 6800 rpm @ 5300 rpm
2013–2015Cadillac ATS @ 6800 rpm @ 4800 rpm
2012–2014Cadillac CTS
@ 6800 rpm @ 4900 rpm
2014–2015Cadillac CTS
@ 6800 rpm @ 4900 rpm
2012–2016Cadillac SRX @ 6800 rpm @ 2400 rpm
2013–2019Cadillac XTS @ 6800 rpm @ 5200 rpm
2012–2015Chevrolet Camaro @ 6800 rpm @ 4800 rpm
2012–2017Chevrolet Caprice PPV @ 6700 rpm @ 4800 rpm
2015–2016Chevrolet Colorado @ 6800 rpm @ 4000 rpm
2015–2016GMC Canyon @ 6800 rpm @ 4000 rpm
2013–2017Chevrolet Equinox @ 6500 rpm @ 4800 rpm
2012–2013Chevrolet Impala @ 6500 rpm @ 5300 rpm
2014–presentChevrolet Impala @ 6500 rpm @ 5300 rpm
2013–2017GMC Terrain @ 6500 rpm @ 4800 rpm
2011–2015Holden Caprice @ 6700 rpm @ 2800 rpm
2011–2013Holden Commodore VE II @ 6700 rpm @ 2800 rpm
2013–2017Holden Commodore VF @ 6700 rpm @ 2800 rpm

LWR

The LWR is dedicated LPG 3.6-liter engine. Introduced in the MY2012 Holden 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 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 compared to its dual fuel LW2 predecessor. Furthermore, the LWR engine exceeded Euro 6 emissions standards.
Applications:
YearModelPowerTorqueDyno chart
2012–2013Holden Commodore VE II @ 6000 rpm @ 2000 rpm
2013–2015Holden Commodore VF @ 6000 rpm @ 2000 rpm
2012–2015Holden Caprice @ 6000 rpm @ 2000 rpm

LCS

The LCS is derived from the direct-injected LLT for use in hybrids, using the two-mode system. Differences from the LLT include a slightly lower compression ratio, 11.3:1, and lower power and torque peaks. It was to debut in the 2009 Saturn Vue Hybrid, where it would make at 6100 rpm and of torque at 4800 rpm.
Fuel economy in city, on highway
Applications:
The 3.6 L twin-turbocharged version for the 2014 Cadillac CTS and 2014 Cadillac XTS was announced at the 2013 NYAS.
The engine is rated at of power at 5750 rpm and of torque at 3500-4500 rpm and helps the CTS achieve 0 to 60 mph| time of 4.6 seconds with an 8-speed automatic transmission.
In essence, the twin-turbo 3.6L V6 is the forced-induction variant of the popular LFX V6 found in the Cadillac ATS, XTS, and SRX, among many other GM models, with several important upgrades, including:
Applications:
YearModelPowerTorqueDyno chart
2014–2019Cadillac XTS @ 6000 rpm @ 1900-5600 rpm
2014–2019Cadillac CTS @ 5750 rpm @ 3500-4500 rpm

LF4

The LF4 is a higher-performance variant of the LF3 for use in the Cadillac ATS-V. Changes to the LF3 include:
Applications:
YearModelPowerTorqueDyno chart
2016–2019Cadillac ATS-V, Cadillac ATS-V Coupe @ 5850 RPM @ 3500 RPM

LFR

The LFR is a bi-fuel variant of the LFX, although multi-point fuel injection is used for both the gasoline and CNG instead of direct-injection.
Applications:
YearModelPowerTorqueDyno chart
2015–2017Chevrolet Impala Bi-FuelCNG @ 6000 RPMCNG @ 5200 RPM
2015–2017Chevrolet Impala Bi-FuelGasoline @ 5900 RPMGasoline @ 4800 RPM

LFY

The LFY is similar to the LFX, but adds stop-start technology and has improved airflow.
Applications:
YearModelPowerTorqueDyno chart
2018–Buick Enclave @ 6800 rpm @ 2800 rpm
2018–Chevrolet Traverse @ 6800 rpm @ 2800 rpm

Fourth generation

Starting with 2016 Cadillac models a new generation of High Feature V6s were developed. These new engines have redesigned block architectures with bore centers increased from on prior HFV6 engines to and a redesigned cooling system to target the hottest areas while also facilitating faster warm-up. They also incorporate engine start-stop technology, cylinder-deactivation, 2-stage oil pumps, and updated variable valve timing featuring intermediate park technology for late-intake valve closure. Both engines debuted in the 2016 Cadillac CT6.

3.0 L

LGW

Bore and stroke of are used, along with a 9.8:1 compression ratio and twin turbos with titanium-aluminide turbine wheels. Maximum engine speed is 6500 RPM. Premium unleaded fuel is required.
Applications:
YearModelPowerTorqueDyno chart
2016–2019Cadillac CT6 @ 5700 RPM @ 2500-5100 RPM

LGY

Bore and stroke of are used, along with a 9.8:1 compression ratio and twin turbos with titanium-aluminide turbine wheels. Maximum engine speed is 6500 RPM. Premium unleaded fuel is required.
Applications:
YearModelPowerTorqueDyno chart
2020-presentCadillac CT5 @ 5600 RPM @ 2400-4400 RPM
2020-presentCadillac CT5V: @ 5600 RPMV: @ 2400-4400 RPM

3.6 L

LGX

Along with the increased bore spacing, the new 3.6 L DI V6 has larger bores than before, growing from to with the same stroke as the 3.0L LGW, for a displacement of. Intake and exhaust valves are also increased in size along with other changes to the cylinder head. Compression ratio is 11.5:1 and maximum engine speed is 7200 RPM.
Applications:
YearModelPowerTorqueDyno chart
2016–2019Cadillac ATS @ 6800 RPM @ 5300 RPM
2016–2019Cadillac CT6 @ 6800 RPM @ 5300 RPM
2016–2019Cadillac CTS @ 6800 RPM @ 5300 RPM
2016–present @ 6800 RPM @ 5300 RPM
2017–presentBuick Lacrosse @ 6800 RPM @ 5200 RPM
2018–presentBuick Regal GS @ 6800 RPM @ 5200 RPM
2018–presentHolden Commodore @ 6800 RPM @ 5200 RPM
2017–presentCadillac XT5 @ 6600 RPM @ 5000 RPM
2017–presentGMC Acadia @ 6600 RPM @ 5000 RPM
2018–presentHolden Commodore @ 6800 RPM @ 5200 RPM
2019–presentChevrolet Blazer @ 6600 RPM @ 5000 RPM
2020–presentCadillac XT6 @ 6600 RPM @ 5000 RPM

LGZ

The LGZ is a variant of the LGX designed for pickup truck use.
Applications:
YearModelPowerTorqueDyno chart
2017–presentGMC Canyon @ 6800 RPM @ 4000 RPM
2017–presentChevrolet Colorado @ 6800 RPM @ 4000 RPM

V12

On March 21, 2007 AutoWeek reported that GM was planning to develop a 60-degree V12 based on this engine family to power the top version of Cadillac's upcoming flagship sedan. This Cadillac would essentially have had two 3.6 L High Feature V6s attached crankshaft-to-crankshaft and would have featured high-end technologies including direct injection and cylinder deactivation. If this engine would have been developed, it would have displaced 7.2 liters, and produced approximately and of torque. Development of the engine was reportedly being conducted in Australia by Holden.
In August, 2008, GM announced that development of the V12 had been cancelled.