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.

[citation needed] GM's Australian auto division Holden produced a HFV6 engine under the name "Alloytec."

[citation needed] 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).

Applications: The LAU is GM's new code for the LP9 Turbo engine, its usage starting with the 2010 Cadillac SRX.

Applications: The LFW is a flexible fuel version of the LF1, capable of running on E85, gasoline, or any mixture of the two.

[10][11][12] Applications: The LFX is an enhanced version of the LLT engine developed jointly by Holden and Cadillac.

They also updated the cam phasing and variable valve timing system compared to the LLT.

Introduced in the MY2012 Holden Commodore, Based on the 3.6-litre LY7 engine, the LWR had a vapour injection system.

Although liquid LPG injection generally produces more power, Holden justified vapour injection on the grounds of lower fuel consumption, lower CO2 emissions, reduced pumping and parasitic losses, and start-up reliability in hot weather.

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 11.8 L/100 km (24 mpg‑imp; 19.9 mpg‑US) – an improvement of 1.6 L/100 km compared to its dual-fuel LW2 predecessor.

Applications: The 3.6 L (3,564 cc) LCS was derived from the direct-injected LLT for use in hybrids, using the two-mode system.

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: The LF4 is a higher-performance variant of the LF3 for use in the Cadillac ATS-V. Changes to the LF3 include: Applications: 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: The LFY is similar to the LFX, but adds stop-start technology and has improved airflow.

[19] These new engines have redesigned block architectures with bore centers increased from 103 mm (4.055 in) on prior HFV6 engines to 106 mm (4.173 in) and a redesigned cooling system to target the hottest areas while also facilitating faster warm-up.

Compared to GM's LFX/LFY 3.6 L engine, the LGX features active fuel management, NVH enhancements and slightly more torque.

[24] Applications: The LGZ is a variant of the LGX designed for use in the Chevrolet Colorado and GMC Canyon.

[25][26] Applications: 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.

If this engine were developed, it would have displaced 7.2 liters, and produced approximately 600 hp (447 kW; 608 PS) and 540 lb⋅ft (732 N⋅m) of torque.

Development of the engine was reportedly being conducted in Australia by Holden, with a potential HSV or Statesman application.