# GM High Value engine

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Reciprocating internal combustion engine

GM High Value engine 2008 Chevrolet Impala 3.5L engine Overview Manufacturer General Motors Production 2004–2011 Layout Configuration Naturally aspirated 60° V6 Displacement 3.5 L; 213.5 cu in (3,498 cc) 3.5 L; 214.2 cu in (3,510 cc) 3.9 L; 236.8 cu in (3,880 cc) Cylinder bore 94 mm (3.7 in) 99 mm (3.9 in) Piston stroke 76 mm (2.99 in) 84 mm (3.31 in) Cylinder block material Cast iron Cylinder head material Aluminum Valvetrain OHV with VVT Compression ratio 9.8:1 Combustion Fuel system Sequential multi-port fuel injection Fuel type Gasoline, E85 Oil system Wet sump Cooling system Water-cooled Output Power output 196–242 hp (146–180 kW) Torque output 213–242 lb⋅ft (289–328 N⋅m) Emissions Emissions target standard California emission standards Emissions control systems Catalytic converter Chronology Predecessor GM 60° V6 engine Buick V6 engine Successor GM High Feature engine

The **High Value** engine family from [General Motors](/source/General_Motors_Corporation) is a group of [cam-in-block](/source/Cam-in-block) or [overhead valve](/source/Overhead_valve) [V6 engines](/source/V6_engine). These engines feature cast iron blocks and aluminum heads, and use the same 60° vee bank as the [60° V6 family](/source/GM_60-Degree_V6_engine) they are based on, but the new 99 mm (3.90 in) bore required offsetting the bores by 1.5 mm (0.059 in) away from the engine center line. These engines (aside from the LX9) are the first cam-in-block engines to implement [variable valve timing](/source/Variable_valve_timing), and won the 2006 Breakthrough Award from *[Popular Mechanics](/source/Popular_Mechanics)* for this innovation. For the 2007 [model year](/source/Model_year), the 3900 engine featured optional [displacement on demand](/source/Displacement_on_demand) or "Active Fuel Management" which deactivates a bank of cylinders under light load to increase highway fuel economy. It was rumored that 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](/source/Tonawanda_Engine), and at the [Ramos Arizpe engine plant](/source/Ramos_Arizpe_Assembly) in Mexico.[1] The assembly line for this engine was manufactured by Hirata Corporation at its powertrain facility in [Kumamoto, Japan](/source/Kumamoto%2C_Japan).

As of the 2012 model year, GM no longer sells these engines in any [U.S. market](/source/United_States_domestic_market) vehicles.

## 3.5

- *These engines should not be confused with the 3.5L [DOHC](/source/DOHC) [LX5 (Shortstar)](/source/Northstar_engine_series) V6 engine.*

### LX9

The **LX9 3500** is an OHV engine based on the [3400 V6](/source/GM_60-Degree_V6_engine#3.4/3400). Bore and stroke are 94 mm × 84 mm (3.70 in × 3.31 in), for a displacement of 3.5 L; 213.5 cu in (3,498 cc).

According to a GM press release from October 2002, the 3500 V6 offered improved performance and fuel efficiency, as well as reduced emissions and [NVH](/source/Noise%2C_vibration%2C_and_harshness) compared to the 3400 V6. The 3500 V6 featured an updated [powertrain control module](/source/Powertrain_control_module), electronic throttle control, fuel injection system, [exhaust manifold](/source/Exhaust_manifold), [catalytic converter](/source/Catalytic_converter), accessory drive system, and improved cooling and sealing systems.[2]

Power output ranges from 196 hp (146 kW) to 201 hp (150 kW) at 5600 rpm , and torque ranges from 213 lb⋅ft (289 N⋅m) to 221 lb⋅ft (300 N⋅m) at 4000 rpm.

Applications:

- 2005–2006 [Buick Terraza](/source/Buick_Terraza)/[Chevrolet Uplander](/source/Chevrolet_Uplander)/[Pontiac Montana SV6](/source/Pontiac_Montana_SV6)/[Saturn Relay](/source/Saturn_Relay)

- 2004–2006 [Chevrolet Malibu](/source/Chevrolet_Malibu)/[Chevrolet Malibu Maxx](/source/Chevrolet_Malibu_Maxx)

- 2005–2006 [Pontiac G6 Sedan / Coupe](/source/Pontiac_G6)

- 2006–2007 [Buick Rendezvous](/source/Buick_Rendezvous)

- 2006 [Pontiac G6 GT Convertible](/source/Pontiac_G6)

### LZ4

 LZ4 engine without plastic cover

The **LZ4 3500** is an OHV engine that uses a block similar to the 3.9L *[LZ9](#LZ9)* V6. It was introduced for the 2006 model year Impala and Monte Carlo.

Bore is the same 99 mm (3.90 in), but the stroke is reduced to 76 mm (2.99 in) for a displacement of 3.5 L; 214.2 cu in (3,510 cc).

It includes continuously variable cam timing (fixed overlap).

Output is 211 hp (157 kW) at 5800 rpm and 214 lb⋅ft (290 N⋅m) at 4000 rpm.

Horsepower rating changed for the 2007 model year to 224 hp (167 kW) at 5800 rpm and 220 lb⋅ft (298 N⋅m) torque at 4000 rpm.

The Chevrolet Malibu, Pontiac G6, and Saturn Aura came equipped with this engine for 2007 (previously, the Malibu and G6 had the non-VVT 201 hp (150 kW) 3.5 L *[LX9](#LX9)*).

In 2008, the SAE horsepower rating was dropped to 219 hp (163 kW), keeping torque as is. On Pontiac G6 convertible models, horsepower was rated at 217 hp (162 kW).

Applications:

- 2006–2009 [Chevrolet Impala](/source/Chevrolet_Impala)

- 2006–2007 [Chevrolet Monte Carlo](/source/Chevrolet_Monte_Carlo)

- 2008–2010 [Chevrolet Malibu](/source/Chevrolet_Malibu) Fleet

- 2007 [Chevrolet Malibu](/source/Chevrolet_Malibu) Sedan/ Maxx

- 2007–2009 [Saturn Aura](/source/Saturn_Aura)

- 2007–2010 [Pontiac G6](/source/Pontiac_G6)

- 2008–2010 [Saturn Vue](/source/Saturn_Vue) XE AWD LZ4 (Note: Only vehicle to have used the GM METRIC bellhousing for 6T70)

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](/source/Flexible_fuel) engine based on the 3.5L *[LZ4](#LZ4)* V6 (it can use either plain gasoline or [E85](/source/E85)) and includes continuously [variable cam timing](/source/Variable_cam_timing) (fixed overlap). Bore and stroke are 99 mm × 76 mm (3.90 in × 2.99 in), for a displacement of 3.5 L; 214.2 cu in (3,510 cc). Output is 211 hp (157 kW) at 5800 rpm and 216 lb⋅ft (293 N⋅m) at 4000 rpm.

Applications:

- 2006–2011 [Chevrolet Impala](/source/Chevrolet_Impala)

- 2006–2007 [Chevrolet Monte Carlo](/source/Chevrolet_Monte_Carlo)

- 2009–2010 [Pontiac G6](/source/Pontiac_G6)

## 3.9

Bore and stroke are 99 mm × 84 mm (3.90 in × 3.31 in) for a displacement of 3.9 L; 236.8 cu in (3,880 cc).

### LZ9

The **LZ9 3900** has roller rocker arms, a [variable length intake manifold](/source/Variable_length_intake_manifold), and [Variable Cam Timing](/source/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 up to 240 hp (179 kW) and 240 lb⋅ft (325 N⋅m) of torque, with a wide [torque curve](/source/Torque_curve). At least 90% of the maximum torque output is available from 1500 rpm to 5500 rpm.

Applications:

- 2006 [Pontiac G6 GTP Sedan / Coupe / Convertible](/source/Pontiac_G6)

- 2007 [Pontiac G6 GT Sport Package Sedan / Coupe](/source/Pontiac_G6)

- 2007–2009 [Pontiac G6 GT Sport Package Convertible](/source/Pontiac_G6)

- 2006–2007 [Chevrolet Malibu SS](/source/Chevrolet_Malibu)

- 2006 [Chevrolet Impala](/source/Chevrolet_Impala)/[Monte Carlo](/source/Chevrolet_Monte_Carlo) (242 hp (180 kW)/242 lb⋅ft (328 N⋅m))

- 2006–2009 [Buick Terraza](/source/Buick_Terraza)/[Chevrolet Uplander](/source/Chevrolet_Uplander)/[Pontiac Montana SV6](/source/Pontiac_Montana_SV6)/[Saturn Relay](/source/Saturn_Relay)

- 2009–2011 [Buick Lucerne](/source/Buick_Lucerne) (227 hp (169 kW) (219 hp (163 kW) in [California-emissions](/source/California_emission_standards) states))

### LGD

The **LGD 3900** is a [flexible-fuel](/source/Flexible-fuel_vehicle) version of the LZ9, and like its 3.5L [LZE](#LZE) counterpart, it can run on [E85](/source/E85), pure gasoline, or any mixture of the two. This is the last version of the 3900 V6. The LGD was not available with Active Fuel Management. Output is slightly reduced at 230 horsepower at 5700 rpm and 235 lb-ft of torque at 3200 rpm.

Applications:

- 2007–2009 [Buick Terraza](/source/Buick_Terraza)/[Chevrolet Uplander](/source/Chevrolet_Uplander)/[Pontiac Montana SV6](/source/Pontiac_Montana_SV6)

- 2009–2011 [Buick Lucerne](/source/Buick_Lucerne)/[Chevrolet Impala](/source/Chevrolet_Impala)

- 2007 [Saturn Relay](/source/Saturn_Relay) *(fleet only)*[3]

### LZ8 and LZG

The **LZ8 3900** has the same [Variable Cam Timing](/source/Variable_Cam_Timing) technology as the LZ9. The 2007 model year introduces the [Active Fuel Management](/source/Active_Fuel_Management) system (formerly known as [Displacement on Demand](/source/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 233 hp (174 kW) and 240 lb⋅ft (325 N⋅m). For 2008, it was replaced by the **LZG 3900**, a [flexible-fuel](/source/Flexible-fuel_vehicle) version of the LZ8.

Applications:

- 2007 [Chevrolet Impala](/source/Chevrolet_Impala) (LZ8)

- 2008 Chevrolet Impala (LZG)

The LZ8 was replaced by the LGD for 2009.

## References

1. **[^](#cite_ref-1)** [List of GM facilities](http://gmauthority.com/blog/gm/gm-manufacturing/)

1. **[^](#cite_ref-2)** ["GM Introduces New V-6, V-12 Engines, 6-Speed Automatic Transmission"](https://www.autoserviceworld.com/jobbernews/gm-introduces-new-v-6-v-12-engines-6-speed-automatic-transmission/). 2002-10-04.

1. **[^](#cite_ref-3)** ["2007 Saturn Relay"](http://archives.media.gm.com/ca/gm/en/products/saturn/archives/2007Relay.html). [General Motors](/source/General_Motors). Retrieved 30 September 2013.

## External links

- [GM Powertrain website](http://media.gm.com/content/media/us/en/news.brand_gm.html/GM/EN/News/PowertrainDetails)

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Adapted from the Wikipedia article [GM High Value engine](https://en.wikipedia.org/wiki/GM_High_Value_engine) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/GM_High_Value_engine?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.