Vehicle Segment:
Full-size sedan
Target Audience:
Domestic market sedan, family vehicle, fleet sales.
Key Competitors:
Ford Crown Victoria, Mercury Grand Marquis, Chrysler Concorde, Dodge Intrepid, Toyota Avalon, Buick LeSabre.
Design Philosophy:
Focus on spaciousness, comfort, V6 and V8 engine options, and traditional American sedan characteristics.
Manual Advantage:
Provides professional-grade repair and maintenance guidance, essential for DIY enthusiasts and independent repair shops, saving on dealership service costs.
Powertrain:
Engine mechanical, engine performance, cooling system, fuel system, exhaust system, lubrication system, ignition system
Drivetrain:
Transmission (automatic), driveline, axles, transfer case (if applicable), differential
Chassis:
Suspension (front and rear), steering system, brake system (front and rear, ABS), wheels and tires
Electrical:
Body electrical systems, lighting, instrumentation, power distribution, charging system, starting system, entertainment system, HVAC controls
Body:
Exterior body panels, interior trim, doors, windows, glass, sunroof, bumpers, structural components
Maintenance:
Routine checks, oil changes, filter replacements, fluid top-offs, lubrication, battery maintenance
Troubleshooting:
Diagnostic procedures, symptom analysis, fault code interpretation, wiring diagrams for electrical troubleshooting
Repair:
Component removal and installation, disassembly and assembly of major systems and sub-assemblies
Diagnostics:
On-Board Diagnostics (OBD-II) system, scan tool usage, live data interpretation
Specifications:
Torque specifications, alignment data, clearances, electrical schematics, component identification
Depth:
Comprehensive, covering basic maintenance to complete engine and transmission overhauls, including specialized procedures for HVAC, ABS, and SRS systems.
Compatibility:
Fully compatible with Windows and macOS operating systems.
Accessibility:
Downloadable for instant access on computers, tablets, and smartphones.
Print Capability:
Printable on a page-by-page or full manual basis.
Digital Binding:
Digital (PDF, no physical binding)
Digital Paper:
Digital (simulated paper for viewing)
Usage License:
Perpetual license, no expiry dates, usable on multiple devices.
Completeness:
Full, unrestricted version; not a trial or limited edition.
Engine 1 Code:
3.8L V6 (L36)
Engine 1 Displacement:
3791 cc (231 cu in)
Engine 1 Horsepower:
200 hp @ 5200 rpm
Engine 1 Torque:
230 lb-ft @ 4000 rpm
Engine 1 Fuel System:
Sequential Electronic Fuel Injection (SFI)
Engine 1 Block Material:
Cast iron
Engine 1 Cylinder Head Material:
Aluminum
Engine 2 Code:
5.3L V8 (LM4/LS4 - specific to 2005+ models, but V8 option existed for some variants prior)
Engine 2 Displacement:
5328 cc (325 cu in)
Engine 2 Horsepower:
280 hp @ 5200 rpm (estimated for base V8 of this era, specific output for 2003 Impala SS not explicitly listed in this product info, but this represents typical for GM V8s)
Engine 2 Torque:
320 lb-ft @ 4000 rpm (estimated)
Engine 2 Fuel System:
Sequential Electronic Fuel Injection (SFI)
ECU:
GM ECM (Engine Control Module)
Transmission Type:
4-speed Automatic (4T65-E)
Transmission Fluid Spec:
Dexron-III (or equivalent specified by GM)
Optional Transmission Type:
Not typically specified for this model year as optional in the standard Impala line, though performance variants might have differed.
Overdrive:
Yes (4th gear)
Electronic Controls:
Electronically controlled shifting for optimized performance and fuel economy.
Length:
Approximately 199.7 inches (5072 mm)
Width:
Approximately 72.7 inches (1847 mm)
Height:
Approximately 57.5 inches (1460 mm)
Wheelbase:
Approximately 110.5 inches (2807 mm)
Curb Weight:
Approximately 3500-3800 lbs (1588-1724 kg), varies by engine and trim.
NHTSA Frontal Impact Driver:
Good (for vehicles of this era)
NHTSA Frontal Impact Passenger:
Good (for vehicles of this era)
ABS:
Standard (Anti-lock Braking System)
Airbags Front:
Standard (Driver and Passenger front airbags)
Child Safety Anchors:
LATCH system (Lower Anchors and Tethers for Children)
Audio System:
AM/FM stereo with CD player, optional cassette player, and premium Monsoon sound system available on higher trims.
Climate Control:
Manual or optional dual-zone automatic climate control.
Cruise Control:
Standard on most trims.
Onboard Diagnostics:
OBD-II compliant for emissions and diagnostics.
Oil Change Interval:
Every 7,500 miles or 6 months (under normal driving conditions, refer to manual for severe conditions).
Engine Air Filter:
Inspect every 15,000 miles, replace as needed or every 30,000 miles.
Spark Plugs:
Replace every 100,000 miles (Long-life iridium plugs).
Engine Oil Type:
API Certified SAE 5W-30 Synthetic Blend
Coolant Type:
GM Gen IV Engine Coolant (Orange), 50/50 mixture with distilled water.
Engine Mounts:
Premature failure of engine mounts, leading to vibration and noise.
Intake Manifold Gasket:
Leaking intake manifold gaskets can cause coolant leaks and misfires on the 3.8L V6.
Power Steering Pump:
Occasional leaks or failure of the power steering pump and hoses.
Headlight Switches:
Dimming or failure of headlights due to faulty headlight switch.
Chevrolet Legacy:
Chevrolet, a division of General Motors, has a long history of producing popular and affordable American vehicles, often associated with practicality and value.
Impala Lineage:
The Impala nameplate has been used by Chevrolet since 1958, evolving through various body styles and market segments. The 2003 model represents the ninth generation of the modern Impala, which debuted in 2000.
Assembly Location:
Oshawa Car Assembly, Oshawa, Ontario, Canada.
Model Year Range:
2000-2005 (9th Generation Impala)
