The Chevrolet Impala IX 3.5 V6 Automatic, produced between 2006 and 2009, represented a significant iteration of Chevrolet’s long-running Impala nameplate. Falling within the ninth generation (2006-2020) of the Impala, this variant occupied a mid-range position in the lineup, offering a balance between performance and affordability. It was primarily marketed towards American families and commuters seeking a spacious and comfortable full-size sedan. The Impala IX aimed to revitalize the Impala’s image, moving away from its earlier reputation as a fleet vehicle and towards a more mainstream consumer appeal. This model was built on the GM W-body platform, shared with other GM vehicles like the Buick LaCrosse and Pontiac Grand Prix.
Technical Specifications
| Brand | Chevrolet |
| Model | Impala |
| Generation | Impala IX |
| Type (Engine) | 3.5 V6 (212 Hp) Automatic |
| Start of production | 2006 |
| End of production | 2009 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 11.2 l/100 km (21 US mpg) |
| Fuel consumption (extra urban) | 7.6 l/100 km (30.9 US mpg) |
| Fuel consumption (combined) | 9.8 l/100 km (24 US mpg) |
| Fuel Type | Petrol (Gasoline) |
| Maximum speed | 180 km/h (111.85 mph) |
| Weight-to-power ratio | 7.8 kg/Hp |
| Weight-to-torque ratio | 5.7 kg/Nm |
| Power | 212 Hp @ 5800 rpm |
| Power per litre | 60.4 Hp/l |
| Torque | 290 Nm @ 4000 rpm (213.89 lb.-ft. @ 4000 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | LZ4 |
| Engine displacement | 3510 cm3 (214.19 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 99 mm (3.9 in.) |
| Piston Stroke | 76 mm (2.99 in.) |
| Compression ratio | 9.8:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Engine oil capacity | 3.8 l (4.02 US qt | 3.34 UK qt) |
| Coolant | 9.6 l (10.14 US qt | 8.45 UK qt) |
| Kerb Weight | 1645 kg (3626.6 lbs.) |
| Trunk (boot) space (minimum) | 527 l (18.61 cu. ft.) |
| Fuel tank capacity | 66 l (17.44 US gal | 14.52 UK gal) |
| Length | 5091 mm (200.43 in.) |
| Width | 1851 mm (72.87 in.) |
| Height | 1487 mm (58.54 in.) |
| Wheelbase | 2807 mm (110.51 in.) |
| Front track | 1586 mm (62.44 in.) |
| Rear track | 1562 mm (61.5 in.) |
| Drivetrain Architecture | Front wheel drive |
| Drive wheel | Front wheel drive |
| Number of gears and type of gearbox | 4 gears, automatic transmission |
| Front suspension | Spring Strut |
| Rear suspension | Coil spring |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 225/60 R16 |
Powertrain & Engine Architecture
The heart of the Impala IX 3.5 V6 Automatic is the LZ4 engine, a 3.5-liter (3510 cc) naturally aspirated V6. This engine utilizes a 60-degree V-angle configuration, contributing to a relatively smooth power delivery. The LZ4 features a cast iron block with aluminum cylinder heads, a common construction for balancing durability and weight. Fuel delivery is managed by a multi-port fuel injection system, providing precise fuel metering for optimal combustion. The engine employs a single overhead camshaft (SOHC) design with two valves per cylinder. Paired with the engine is a four-speed automatic transmission (4T65E), chosen for its smooth shifting characteristics and suitability for everyday driving. This transmission was a mainstay in many GM vehicles of the era.
Driving Characteristics
The 212 horsepower and 290 lb-ft of torque produced by the 3.5L V6 and 4-speed automatic combination provided adequate, though not exhilarating, performance. Acceleration from 0 to 60 mph typically took around 8-9 seconds. The automatic transmission was tuned for comfort rather than aggressive shifting, prioritizing smooth transitions between gears. Compared to the later, more powerful 3.9L V6 offered in subsequent Impala models, the 3.5L felt less responsive, particularly during overtaking maneuvers. However, it offered a more relaxed driving experience than the base 3.8L V6, and was generally considered a good match for the Impala’s size and weight. The gear ratios were optimized for highway cruising, making it a comfortable long-distance vehicle.
Equipment & Trim Levels
The Impala IX 3.5 V6 Automatic typically came standard with features such as air conditioning, power windows and locks, a CD player with an auxiliary input jack, and cruise control. Higher trim levels, like the LT and LTZ, added features like leather upholstery, heated front seats, a premium sound system, and alloy wheels. Optional extras included a sunroof, remote start, and a navigation system. Interior upholstery was typically cloth on the base models, with leather available on the higher trims. The dashboard layout was relatively straightforward, prioritizing ease of use and functionality.
Chassis & Braking
The Impala IX utilized a front-wheel-drive layout with an independent front suspension featuring coil springs and a multi-link rear suspension. This suspension setup aimed to provide a comfortable ride while maintaining reasonable handling characteristics. The front brakes were ventilated discs, while the rear brakes were solid discs. Anti-lock Braking System (ABS) was standard, enhancing safety during emergency braking situations. Steering was rack-and-pinion, providing responsive and predictable handling. The standard tire size was 225/60R16, offering a balance between ride comfort and grip.
Market Reception & Comparison
The 2006-2009 Impala IX 3.5 V6 Automatic received generally positive reviews, particularly for its spacious interior, comfortable ride, and value for money. Critics noted that the engine, while adequate, wasn’t particularly exciting. Fuel economy was considered average for its class, with combined MPG figures around 24. Compared to the base 3.8L V6 Impala, the 3.5L offered a noticeable performance improvement. However, the 3.9L V6, introduced in later years, provided a more substantial power boost. Reliability was generally good, although some owners reported minor issues with the transmission and electrical components.
Legacy
The Impala IX 3.5 V6 Automatic remains a relatively affordable and practical used car option. The LZ4 engine is generally considered reliable, although regular maintenance is crucial. The four-speed automatic transmission, while not the most modern, has proven to be durable. Common issues include oil leaks and occasional sensor failures. Today, these Impalas are often sought after by those looking for a comfortable and spacious full-size sedan without breaking the bank. While not a performance icon, the Impala IX 3.5 V6 Automatic represents a solid and dependable choice in the used car market, offering a blend of comfort, space, and affordability.
