GM High Value Engine

The High Value engine family from General Motors is a group of cam-in-block or "overhead valve" V6 engines. They use the same 60° vee bank as the 60° V6 family they are based on, but the new bore required offsetting the bores by away from the engine centerline. These engines (aside from the LX9) are the first cam in block engines to implement variable valve timing, and won the 2006 Breakthrough Award from ''Popular Mechanics'' for this innovation. For the 2007 model year, the 3900 engine features optional displacement on demand or "Active Fuel Management" which deactivates a bank of cylinders under light load to increase highway fuel economy. It was rumored GM would produce a 3-valve design, but that never came to be. These engines were produced primarily at the GM factory in Tonawanda, New York and at the Ramos Arizpe engine plant in Mexico. The assembly line for this engine was manufactured b
Hirata Corporation
at their powertrain facility in Kumamoto, Japan.

As of the 2012 model year, GM no longer sells these motors in any US market vehicles.

3.5

:''These engines should not be confused with the 3.5L DOHC LX5 (Shortstar) V6 engine.''

LX9

The LX9 3500 is an OHV engine based on the 3400 V6. It incorporates electronic throttle control. Bore and stroke is , for a displacement of . A GM Press Release for the 2004 Malibu described the 3500 thus: "3.5L V6, will debut in the 2004 Chevrolet Malibu. The engine offers improved performance and fuel efficiency, and runs smoother and quieter than earlier generation V6 engines. The 3500 V6 features an advanced powertrain control module, improved fuel injection system, a redesigned exhaust manifold and a new catalytic converter contribute to reduced emissions, as well as improved efficiency and performance characteristics. Improvements in cooling, sealing and the accessory drive system add to the engine's overall quality, reliability and durability." Power output ranges from to , torque ranges from to .

It was used in the following vehicles and model years:
* 2005–2006 Buick Terraza/Chevrolet Uplander/ Pontiac Montana SV6/ Saturn Relay
* 2004–2006 Chevrolet Malibu/ Chevrolet Malibu Maxx
* 2005–2006 Pontiac G6 Sedan / Coupe
* 2006–2007 Buick Rendezvous
* 2006 Pontiac G6 GT Convertible

LZ4

The LZ4 3500 is an OHV engine that uses a similar block as the 3.9L '' LZ9'' V6 . It was introduced for the 2006 model year and Monte Carlo. Bore is the same , but the stroke is reduced to for a displacement of . It includes continuously variable cam timing (fixed overlap). It has a cast iron block and aluminum heads. Output is at 5800 rpm and at 4000 rpm. Horsepower rating changed for the 2007 model year to at 5800 rpm and torque at 4000 rpm. The Chevrolet Malibu, Pontiac G6, and Saturn Aura became equipped with this engine for 2007 (previously the Malibu and G6 had the non-VVT 3.5 L '' LX9''). In 2008 SAE ratings dropped the horsepower ratings to , keeping torque as is. On Pontiac G6 convertible models, horsepower was rated at .

Applications:
* 2006–2009 Chevrolet Impala
* 2006–2007 Chevrolet Monte Carlo
* 2007–2010 Chevrolet Malibu/ Chevrolet Malibu Maxx
* 2007–2009 Saturn Aura
* 2007–2009 Pontiac G6
* 2008–2009 Saturn Vue XE AWD (/)

Note: GM often refers to this engine in its literature as a "3.5L V6 with Variable Valve Timing".

LZE

The LZE 3500 is an OHV flexible fuel engine based on the 3.5L '' LZ4'' V6 (it can use either plain gasoline or 15% Gasoline and 85% Ethanol, E85) and includes continuously variable cam timing (fixed overlap). It has a cast iron block and aluminum heads. Bore and stroke is , for a displacement of . Output is at 5800 rpm and at 4000 rpm.

Applications:
* 2006–2011 Chevrolet Impala
* 2006–2007 Chevrolet Monte Carlo
* 2009-2010 Chevrolet Malibu
* 2009-2010 Pontiac G6

3.9

Bore and stroke is for a displacement of .

LZ9

The LZ9 3900 has roller rocker arms, a variable length intake manifold, and Variable Cam Timing, a novelty on a pushrod engine. A computer-controlled plenum divider, along with the VVT cam function, improves efficiency across a broader RPM range.

It produces and torque, with a wide torque curve. 90% of the torque is available from 1500 rpm to 5500 rpm.

Applications:
* 2006 Pontiac G6 GTP Sedan / Coupe / Convertible
* 2007 Pontiac G6 GT Sport Package Sedan / Coupe
* 2007–2009 Pontiac G6 GT Sport Package Convertible
* 2006–2007 Chevrolet Malibu SS
* 2006–2011 Chevrolet Impala/Monte Carlo (/ 06 only)
* 2006–2009 Buick Terraza/Chevrolet Uplander/ Pontiac Montana SV6/ Saturn Relay
* 2009–2011 Buick Lucerne ( ( in California-emissions states))

LZ8

The LZ8 3900 has the same Variable Cam Timing technology as the LZ9. The 2007 model year introduces the Active Fuel Management system (formerly known as Displacement on Demand), which can turn off a bank of cylinders under a light load for increased fuel economy. Output is slightly lower than the LZ9 at and .

This engine is used in the following vehicles:

* 2007–2008 Chevrolet Impala

LGD

The LGD 3900 is a flexible fuel version of the 3.9L, and like its 3.5 L LZE counterpart, it can run on E85, pure gasoline, or any mixture of the two. This is the last ever version of the 3900 V6. The LGD is not available with Active Fuel Management. Output is slightly reduced at 230 horsepower at 5,700 rpm and 235 ft/lbs of torque at 3,200 rpm.

* 2007–2009 Buick Terraza/Chevrolet Uplander/ Pontiac Montana SV6
* 2009–2011 Buick Lucerne/Chevrolet Impala
* 2007 Saturn Relay ''(fleet only)''

LZG

The LZG 3900 is a flexible fuel version of the LZ8 that replaces the LZ8 in the Chevrolet Impala. It keeps the Active Fuel Management system introduced on that engine and produces a nearly identical and .
* 2008 Chevrolet Impala

See also

* GM 60-Degree V6 engine Technological ancestor of the GM High Value V6.
* List of GM engines
* GM High Feature engine

References

{{reflist

External links

GM Powertrain website

High Value
V6 engines
Gasoline engines by model