🏷️ Basic Information Identification Make: Jeep Model: Grand Cherokee Year: 2003 Generation Platform: WJ/WG Codes Chassis Code: WJ Chassis Code Diesel: WG 👋 Introduction Market Position Vehicle Segment: Mid-size Luxury SUV Target Audience: Families, off-road enthusiasts, those seeking comfort and capability Competitive Analysis Primary Competitors 2003: Ford Explorer, Toyota 4Runner, Chevrolet TrailBlazer, Nissan Pathfinder, Land Rover Discovery Key Features Key Selling Points: Robust chassis, available powerful engines (including the Mercedes-Benz-derived diesel), legendary Jeep off-road capability (Quadra-Drive II system), comfortable interior, towing capacity 📋 Manual Details Coverage Areas Manual Type: Service, Diagnostic, and Parts Lists Language: English Format: PDF (11 files) Page Count Estimated Total Pages: Likely exceeds 2000 pages across 11 files (specific page count per file not provided) 📖 Manual Coverage Systems Covered Powertrain: Engine (both gasoline and diesel variants), Transmission (automatic and manual where applicable), Drivetrain (4x4 systems, differentials) Chassis: Suspension (front and rear), Steering, Brakes (hydraulic, ABS), Wheels and Tires Electrical: Engine Control Module (ECM), Body Control Module (BCM), Lighting, Instruments, Audio System, HVAC Controls, Power Accessories (windows, locks, mirrors), Diagnostic Trouble Codes (DTCs) Body And Interior: Body structure, Exterior panels, Doors, Glass, Seats, Trim, Climate control system Procedures Included Maintenance: Scheduled maintenance intervals, Fluid changes (oil, coolant, brake, transmission, differential), Filter replacements, Lubrication Diagnostics: Symptom-based troubleshooting, Diagnostic Trouble Code (DTC) diagnosis and clearing, Component testing, Electrical circuit analysis, Scan tool usage Repair: Engine component repair and overhaul, Transmission service and repair, Brake system repair, Suspension and steering component replacement, Electrical component repair, Body panel repair and replacement Parts Information: Parts identification, Exploded views, Part numbers, Component location Technical Depth Depth: Comprehensive, covering routine maintenance, troubleshooting, diagnosis, and complete component-level repairs. Includes detailed wiring diagrams and diagnostic flowcharts. 📊 Manual Specifications File Format Format: PDF Searchability: Fully bookmarked and searchable text Compatibility: All Windows, Linux, and Mac operating systems Print Quality Printability: Printable Binding Type Binding: Digital (PDF format) Paper Type Media Type: Digital ⚙️ Engine Specifications Primary Engine Gasoline Engine Type: 4.7L V8 (PowerTech) Displacement: 4.7 Liters (285 cu in) Horsepower: Approximately 235-260 hp (depending on specific sub-model/tune) Torque: Approximately 300-325 lb-ft (depending on specific sub-model/tune) Fuel System: Multi-point Fuel Injection (MPI) Valvetrain: Overhead Valve (OHV), 16 valves Block Material: Cast Iron Cylinder Head Material: Aluminum Secondary Engine Gasoline Engine Type: 4.0L Inline 6 (PowerTech) Displacement: 4.0 Liters (242 cu in) Horsepower: Approximately 190 hp Torque: Approximately 235 lb-ft Valvetrain: Overhead Valve (OHV), 12 valves Block Material: Cast Iron Cylinder Head Material: Cast Iron Diesel Engine Engine Type: 2.7L CRD (Common Rail Diesel) - Mercedes-Benz OM664 Displacement: 2.7 Liters (165 cu in) Horsepower: Approximately 161 hp @ 4000 rpm Torque: Approximately 295 lb-ft @ 1800 rpm Fuel System: Common Rail Direct Injection (CRD) Turbocharger: Variable Geometry Turbocharger (VGT) Block Material: Aluminum Cylinder Head Material: Aluminum 🔧 Transmission Standard Gasoline Type: 4-speed Automatic (45RFE/48RE) Optional Gasoline Type: 5-speed Manual (NV3500) - less common on higher trims Diesel Type: 5-speed Automatic (NAG1 - Mercedes-Benz 5G-Tronic) Features Transfer Case: Selec-Trac (2WD/4WD Full-Time), Quadra-Trac II (4WD with Low Range), Quadra-Drive II (4WD with Electronic Limited-Slip Differentials) Fluid Type Automatic Gasoline Recommendation: ATF+4 (Mopar) Diesel Automatic Recommendation: MB 236.10 or equivalent (e.g., ATF 134) 📐 Dimensions Exterior Length: Approx. 188.8 inches Width: Approx. 73.3 inches Height: Approx. 71.5 inches Wheelbase: Approx. 116.0 inches Weights Curb Weight: Approx. 4,300 - 4,700 lbs (depending on engine and configuration) Towing Capacity: Up to 5,000 - 7,000 lbs (depending on engine and towing package) 🛡️ Safety Features Ratings NHTSA Frontal Driver: Good (2003 model year - specific ratings may vary slightly by year and test methodology) NHTSA Frontal Passenger: Good (2003 model year) IIHS Frontal Offset: Acceptable (for comparable years) Active Features ABS: Standard Anti-lock Braking System (ABS) Traction Control: Available (e.g., Electronic Traction Control - ETC) Stability Control: Electronic Stability Program (ESP) - available on some models Passive Features Airbags: Driver and front passenger airbags, available side curtain airbags Seatbelts: Front and rear seatbelts with pretensioners 💡 Technology Features Infotainment Audio System: Factory AM/FM/CD player, optional Infinity Gold premium audio system with subwoofer Navigation: Optional factory navigation system Driver Assistance Cruise Control: Standard cruise control Parking Assist: Rear parking assist (ParkSense) - optional Connectivity Auxiliary Inputs: Typically none for auxiliary audio on factory systems (aftermarket solutions available) 🔧 Maintenance Service Intervals Oil Oil Change Interval Gasoline: Every 3,000 - 6,000 miles or 6 months (depending on driving conditions and oil type, consult manual for specifics) Oil Change Interval Diesel: Every 5,000 - 7,500 miles or 6 months (depending on driving conditions and oil type, consult manual for specifics) Service Intervals Coolant Coolant Flush Interval: Typically every 30,000 - 60,000 miles or 2-5 years Service Intervals Transmission Transmission Fluid Change Interval: Every 30,000 - 60,000 miles (depending on transmission type and driving conditions) Fluid Specifications Engine Oil Viscosity 4.7L: SAE 5W-30 or 5W-40 (API Certified)...