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Buick

2003 BUICK Regal Owners Manual

2003 BUICK Regal Owners Manual

$17.99
$17.99
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Vehicle data plateRef 24871
Brand
Buick
Vehicle
Cars
Models covered
Regal
Years
2003
Format
PDF, searchable, print-ready
Delivery
Instant download after checkout
Language
English

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  • The same link is emailed to you — re-download any time
  • Open on phone, tablet or PC; print only the pages you need
  • Not sure it covers your model year? Ask us before you buy
🏷️ Basic Information
Identification
Make:
Buick
Model:
Regal
Model Year:
2003
Generation
Platform:
GM W-body platform
Codes
Chassis Code:
L36 (3.8L naturally aspirated), L67 (3.8L supercharged)
👋 Introduction
Market Position
Segment:
Mid-size sedan
Brand Perception:
Buick aimed for a balance of comfort, quietness, and a touch of luxury within the mainstream market.
Competitive Analysis
Key Competitors:
Ford Taurus, Chevrolet Impala, Dodge Intrepid, Toyota Camry, Honda Accord.
Key Features
Focus:
Comfort-oriented ride, spacious interior, availability of a potent supercharged V6 engine option.
📋 Manual Details
Coverage Areas
Systems Covered:
Introduction, Instrument Cluster, Entertainment Systems, Climate Controls, Lights, Driver Controls, Locks and Security, Seating and Safety Restraints, Driving, Customer Assistance, Reporting Safety Defects (U.S. only), Cleaning, Maintenance and Specifications, Engine Compartment, Engine Oil, Battery, Fuel Information, Air Filter(s), Part Numbers, Refill Capacities, Lubricant Specifications, Accessories.
Page Count
Estimated Page Count:
200-300 (typical for this era's owner's manuals)
Manual Type
Type:
Owner's Manual
Language
Language:
English
Format
Format:
Digital PDF Download
📖 Manual Coverage
Systems Covered
Powertrain:
Engine operation, fluid types, capacities, basic maintenance procedures for engine oil, coolant, and fuel.
Chassis And Suspension:
Limited coverage on basic checks, tire pressure, and wheel torque specifications.
Electrical And Lighting:
Instrument cluster operation, lighting controls, fuse locations (basic), battery maintenance.
Comfort And Convenience:
Climate control system operation, power locks, security features, seating adjustments, infotainment system basics (radio, CD player).
Procedures Included
Routine Maintenance:
Checking and topping off engine oil, coolant, windshield washer fluid; tire pressure checks; air filter inspection; battery care.
Troubleshooting:
Basic troubleshooting for warning lights and common vehicle issues, guidance on when to seek professional service.
Safety Features:
Operation of airbags, seatbelts, child seat installation recommendations, and basic safety advice for driving.
Technical Depth
Depth:
Owner-level information for routine operation, basic maintenance, and understanding vehicle features. Does not cover in-depth diagnostics or component-level repair procedures.
📊 Manual Specifications
File Format
File Type:
PDF
Searchability:
Likely text-searchable if scanned optically with OCR, or fully searchable if originally digital.
Print Quality
Quality:
Digital reproduction of original factory manual, quality dependent on original scan or creation.
Binding Type
Binding:
Not Applicable (Digital Download)
Paper Type
Paper Quality:
Not Applicable (Digital Download)
⚙️ Engine Specifications
Primary Engine
Engine Type 1:
3.8L V6 (L36) naturally aspirated
Displacement 1:
3.8 Liters (231 cu in)
Horsepower 1:
200 hp @ 5200 rpm
Torque 1:
230 lb-ft @ 4000 rpm
Optional Engine
Engine Type 2:
3.8L V6 (L67) Supercharged
Displacement 2:
3.8 Liters (231 cu in)
Horsepower 2:
240 hp @ 5200 rpm
Torque 2:
280 lb-ft @ 3600 rpm
Fuel System
Fuel Delivery:
Sequential Fuel Injection (SFI)
Recommended Fuel:
87 Octane (for L36), 91 Octane (recommended for L67 Supercharged)
🔧 Transmission
Standard
Transmission Type:
4-speed automatic (4T65-E)
Optional
Transmission Type:
4-speed automatic with manual mode (4T65-E HD for supercharged models)
Features
Overdrive:
Yes
Traction Control:
Available (Traction Control System - TCS)
📐 Dimensions
Exterior
Length:
198.7 inches
Width:
71.4 inches
Height:
57.0 inches
Wheelbase:
110.5 inches
Interior
Passenger Volume:
Approximately 103.7 cu ft
Cargo
Trunk Volume:
Approximately 15.1 cu ft
Weights
Curb Weight Approx Base:
3500-3700 lbs
Curb Weight Approx Supercharged:
3700-3900 lbs
🛡️ Safety Features
Ratings
NHTSA Frontal Driver Impact:
Good (as per IIHS, NHTSA ratings varied)
NHTSA Frontal Passenger Impact:
Good (as per IIHS, NHTSA ratings varied)
Active Features
ABS:
Standard (Anti-lock Braking System)
Traction Control:
Available (TCS)
Passive Features
Airbags:
Driver and front passenger airbags, available side-impact airbags.
Seatbelts:
3-point active front seatbelts with pretensioners, rear shoulder belts.
💡 Technology Features
Infotainment
Audio System:
AM/FM stereo with CD player, optional cassette player, optional premium audio systems (e.g., Monsoon).
Climate Controls:
Manual or automatic climate control systems with single or dual-zone capabilities.
Driver Assistance
Cruise Control:
Standard
Parking Sensors:
Not available for this model year.
Connectivity
Auxiliary Input:
Not typically equipped; aftermarket solutions available.
Bluetooth:
Not available for this model year.
🔧 Maintenance
Service Intervals
Oil Change Interval:
Every 3,000-5,000 miles or 3-6 months (depending on driving conditions and oil type, consult manual for specifics).
Tire Rotation:
Every 7,500 miles
Air Filter Replacement:
Every 15,000-30,000 miles (inspect annually)
Fluid Specifications
Engine Oil Viscosity:
SAE 5W-30 (for both L36 and L67 engines)
Engine Oil Type:
API Certified, SG or higher, synthetic or conventional
Coolant Type:
GM Dex-Cool (Orange)
Transmission Fluid Type:
Dexron III or Dexron VI Automatic Transmission Fluid
Power Steering Fluid Type:
GM Power Steering Fluid or Dexron III/VI ATF
Brake Fluid Type:
DOT 3
Known Issues
Common Problems:
Upper strut mount bearings, intake manifold gaskets (leaks), power steering pump issues, window regulator failures, spark plug wire degradation.
Supercharger Specific:
Supercharger clutch bearing wear, intercooler leaks (less common).
Part Numbers Example
Air Filter Part No Approx:
AC-Delco A3134C or equivalent (verify with VIN)
Refill Capacities
Engine Oil Capacity:
4.5 quarts (with filter)
Coolant Capacity:
Approx. 10.0 quarts (with heater)
Transmission Fluid Capacity:
Approx. 3.0 quarts (dry fill), 9.5 quarts (total capacity)
📚 Vehicle History
Brand Heritage
Buick Legacy:
Buick has a long-standing reputation for comfortable, quiet, and well-built vehicles, often positioned as a premium offering within GM.
Model Evolution
Regal Lineage:
The Regal nameplate has been used for various Buick models, including coupes and sedans, evolving through different platforms and styles.
Production
Manufacturing Location:
Oshawa, Ontario, Canada; Fairfax, Kansas, USA (W-body platform)
Model Generation:
This generation of the Regal was part of the fourth generation of the W-body platform, produced from 1997 to 2005.
🏆 Awards & Recognition
Recognitions
IIHS Safety Pick:
The Regal often received good ratings from the IIHS for frontal impact protection in its era.
Ratings
Car And Driver Best 10:
While not a consistent annual awardee, the Regal GS (supercharged model) was recognized for its performance in its class.

Delivery & file format

This is a digital PDF download, not a printed book. After payment the download link appears on your order confirmation page and is emailed to the address you entered. Files open in any PDF reader on phone, tablet or computer and can be printed.

Check the model year and engine before you buy

Manufacturers change procedures, wiring and part numbers between model years and engine options. If your VIN plate shows a year or engine code that is not listed on the data plate above, contact us with the model, year and VIN and we will confirm coverage before you order.

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