General Motors' Chevrolet division produced the 2003 Impala equipped with a 3.4-liter V-6 engine. The 2003 model was part the eighth generation of 1999 to 2005 Impalas. The 3.4-liter engine was in the base version, while the upscale LS model received the 3.8-liter V-6. The Impala Super Sport had a supercharged V-6. The eighth-generation Impalas were part of Chevy's new Impala program after the seventh generation ceased production in 1996. The later Impalas replaced the Lumina.
Power
The base 2003 Impala's V-6 displaced 3.4 liters. It featured a 3.62-inch bore and 3.31-inch stroke. The compression ratio was 9.5-to-1 and a multi-point fuel injection system delivered the gasoline to the engine. Its horsepower rating was 180 and it could generate 205 foot-pounds of torque. In contrast, the 3.8-liter version developed 200 horsepower and 225 foot-pounds of torque. The supercharged 3.8 wielded 240 horsepower. A four-speed automatic transmission matched all engines.
Dimensions
The four-door sedan had a curbside weight rating of 3,389 lbs. Its wheelbase measured 110.5 inches and the body's length was 200 inches. It stood 57.3 inches tall and 73 inches wide. The front track width was 62 inches while the rear track measured 61.1 inches. Cabin room was fairly generous. The front and rear headroom was 39.2 and 36.8 inches respectively. The front legroom was 42.2 inches and rear legroom measured 38.4 inches. Front and rear shoulder room was 59 and 58.9 inches respectively. Cargo space was 18.6 cubic feet. The fuel tank held 17 gallons and the car rode on 16-inch steel wheels.
Chassis
The front-wheel-drive 2003 model had all-wheel vented disc brakes. The front and rear suspensions featured independent MacPherson struts, stabilizer bars and coil springs. Its curb-to-curb turning radius was 38 feet.
Features
The 2003 Impala featured as standard equipment front and rear color-keyed bumpers, tinted heat-reflective glass, air conditioning, six-speaker AM/FM anti-theft stereo, clock, split front bench seat, power door locks, mirrors and windows, remote locking system, power steering, tachometer and cloth upholstery. Safety equipment included three-point seatbelts, driver and passenger front airbags, child seat anchors, rear door child safety locks, engine immobilizer, front and rear headrests, electronic brakeforce distribution and emergency interior trunk release.
Performance
The 2003 models achieved 19 mpg in the city and 29 mpg on the highway. A full tank of gas allowed the Imapala a maximum range of 493 miles. However, the automotive press was less than enthusiastic about the eighth generation Impalas. Edmunds.com, for example, complained the interior and exterior styling was lackluster, the steering "vague" and the suspension "soggy." Edmunds.com praised the Impalas roominess and the 3.4-liter V-6's power.
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