The 2003 Chevrolet Impala is a well-regarded American sedan, part of the seventh generation of the Impala nameplate. Built on the W-body platform, this model offers a blend of comfort and performance, available in trims like the LS and the sportier SS, which features a supercharged 3.8L V6 engine. The Impala is recognized for its robust safety features, earning 5-star frontal crash test ratings and a 'Good' rating for frontal offset impact. With its spacious interior, substantial trunk volume, and a legacy of engineering, the 2003 Impala continues to be a practical choice for daily commuting and family transport.
This comprehensive service manual provides detailed information for the 2003 Chevrolet Impala, covering all trim levels. It encompasses a wide range of essential topics, including engine service for the 3.4L V6 and 3.8L Supercharged V6, transmission repair, brake systems, suspension, steering, and electrical systems. Additionally, the manual offers in-depth guidance on maintenance schedules, troubleshooting common issues, diagnostic procedures, and access to technical data and wiring diagrams. This resource is designed to assist automotive technicians, mechanics, and DIY enthusiasts in effectively maintaining, diagnosing, and repairing the vehicle, ensuring its optimal performance and longevity.
Trim Levels Covered:
All (e.g., LS, SS)
Platform:
W-body (GMT115)
Target Audience:
Automotive technicians, mechanics, DIY enthusiasts, and anyone interested in repairing or maintaining the 2003 Chevrolet Impala.
Value Proposition:
Low price, great quality, instant access, comprehensive coverage, and dedicated customer support.
Features:
Official factory information, detailed diagrams, troubleshooting guides, repair procedures, and technical specifications.
Access Method:
Instant download, eliminating the need for physical searching and shipping delays.
Primary Coverage:
Comprehensive service and repair for the 2003 Chevrolet Impala
Additional Coverage:
Troubleshooting, diagnostics, maintenance, technical data, diagrams, and equipment information.
Estimated Pages:
Hundreds to Thousands (printable quality)
Type:
Official Factory Service Repair Manual
Compatibility:
All Versions of Windows & Mac
Delivery:
Instant Download
Powertrain:
Engine Service/Repair, Transmission Service/Repair, Fuel Injection, Fuel System, Cooling System, Exhaust System.
Chassis:
Brake System, Suspension, Steering, Axle, Differential/Drive.
Electrical:
Electrical System, Wiring Diagram, Engine Control System.
Body And Comfort:
Chassis/Body, Restraint System, Interior, Heater/Air Conditioning.
Emissions:
Emission System.
Maintenance:
General Maintenance, Periodic Lubrication, Maintenance Check List, Maintenance Chart, Service Instructions.
Repair:
Complete repair procedures for all covered systems.
Diagnostics:
Troubleshooting guides and diagnostic procedures.
Depth:
Detailed technical data, circuits, diagrams, and equipment specifications, suitable for technicians and mechanics.
Readability:
Searchable text within PDF files for quick information retrieval.
Quality:
Great Quality Printable Pages
Binding:
Digital (downloadable), not applicable for physical binding.
Paper:
Digital, not applicable for physical paper type.
Software Requirements:
Adobe PDF Reader & WinZip
Engine Options:
3.4L V6 (L32) and 3.8L V6 (L36) Supercharged (for SS trim)
3.4L V6 Horsepower:
180 hp @ 4800 rpm
3.4L V6 Torque:
205 lb-ft @ 3200 rpm
3.8L Supercharged V6 Horsepower:
240 hp @ 5200 rpm
3.8L Supercharged V6 Torque:
280 lb-ft @ 3600 rpm
Fuel Delivery:
Sequential Fuel Injection (SFI)
Fuel Type:
Unleaded gasoline (87 octane recommended)
Transmission Type:
4-speed automatic (4T65-E)
Transmission Options:
None for 2003 model year
Transmission Features:
Electronically controlled, overdrive.
Length:
Approximately 199.7 inches
Width:
Approximately 72.4 inches
Height:
Approximately 57.4 inches
Wheelbase:
Approximately 110.5 inches
Passenger Volume:
Approximately 105.0 cubic feet
Trunk Volume:
Approximately 17.0 cubic feet
Curb Weight 3.4L:
Approximately 3500-3600 lbs
Curb Weight 3.8L Sc:
Approximately 3700-3800 lbs
NHTSA Front Impact Driver:
5 Stars
NHTSA Front Impact Passenger:
5 Stars
IIHS Moderate Overlap Frontal Offset:
Good
Brakes:
Front vented discs, rear solid discs (ABS optional/standard depending on trim).
Traction Control:
Optional on some models.
Airbags:
Frontal airbags for driver and front passenger.
Seatbelts:
Three-point seatbelts for all outboard seating positions, front seatbelt pretensioners.
Audio System:
Optional premium audio systems with CD player and cassette player, steering wheel audio controls available on higher trims.
Cruise Control:
Standard on all models.
Phone Integration:
Not available in this era of vehicle.
Oil Change Interval:
Every 7,500 miles or 6 months, whichever comes first (synthetic blend recommended).
Tire Rotation:
Every 7,500 miles.
Transmission Fluid Change:
Consult manual for specific intervals, typically around 100,000 miles or as needed.
Engine Oil:
SAE 5W-30 (API certified)
Coolant:
Dex-Cool® Extended Life Antifreeze/Coolant (orange color)
Transmission Fluid:
Dexron® III (or equivalent)
Common Problems:
Intake manifold gasket leaks, power steering leaks, door lock actuator failures, and dashboard crack issues are commonly reported.
Chevrolet Legacy:
Chevrolet has a long history of producing popular and reliable American sedans.
Impala Lineage:
The 2003 Impala is part of the seventh generation of the Impala nameplate, introduced for the 2000 model year, marking a return to a front-wheel-drive platform and a distinctively modern styling.
Manufacturing Location:
General Motors Oshawa Car Assembly in Oshawa, Ontario, Canada.
Model Year Range:
2000-2005 for this generation of Impala.
Safety Awards:
Earned 5-star frontal crash test ratings from NHTSA.
IIHS Ratings:
Rated 'Good' for moderate overlap frontal offset crashworthiness by IIHS.
Compliance:
Meets all US Federal Motor Vehicle Safety Standards (FMVSS).
