Market Position:
The 2002-2003 Jeep Grand Cherokee represented a refined iteration of Jeep's premium SUV, competing with established luxury and capable off-road vehicles. This manual serves as an essential resource for owners seeking to maintain or repair their vehicle.
Competitive Analysis:
Competed against vehicles like the Ford Explorer, Toyota 4Runner, and Land Rover Discovery. The Grand Cherokee of this era was known for its upscale interior, refined ride, and capable powertrains, including powerful V8 options.
Key Features:
Iconic Jeep off-road capability blended with on-road comfort and luxury. Available with robust engine options and advanced four-wheel-drive systems.
Coverage Areas:
Comprehensive service, repair, and maintenance for 2002-2003 Jeep Grand Cherokee
Page Count:
Estimated 2500+ pages (typical for this era's factory service manuals, not explicitly stated in product description but implied by 'most complete')
Manual Type:
Service Repair Manual
Format:
PDF (Downloadable)
Compatibility:
All Versions of Windows & Mac
Requirements:
Adobe PDF Reader, WinZip
Systems Covered:
Engine Systems, Driveline, Suspension, Brakes, Cooling System, Exhaust System, Fuel System, Steering, Transaxle, Body, Heating & Air Conditioning, Emissions Control, Audio System, Chime/Buzzer, Electronic Control Modules, Heated Systems, Horn, Ignition Control, Instrument Cluster, Lamps, Message Systems, Power Systems, Restraints, Speed Control, Vehicle Theft Security, Wipers/Washers, Wiring
Procedures Included:
Lubrication & Maintenance, General Repairs, Troubleshooting, Diagnostics, Component Removal & Installation, Overhaul Procedures, Electrical Schematics, Wiring Diagrams, Torque Specifications, Special Tool Requirements
Technical Depth:
In-depth, covering everything from routine maintenance to complex diagnostics and major component overhauls, suitable for both novice DIYers and experienced technicians.
Primary Engine:
4.0L Inline 6-Cylinder (PowerTech)
4.0L Engine Horsepower:
190 hp @ 4600 rpm (approx.)
4.0L Engine Torque:
235 lb-ft @ 3200 rpm (approx.)
Optional Engine:
4.7L V8 (PowerTech)
4.7L Engine Horsepower:
235 hp @ 4500 rpm (approx.)
4.7L Engine Torque:
295 lb-ft @ 3200 rpm (approx.)
Fuel System:
Sequential Multi-Port Fuel Injection (MPI)
Emission Control:
Catalytic Converter, On-Board Diagnostics (OBD-II)
Exterior Length:
184.6 inches (4689 mm)
Exterior Width:
74.0 inches (1880 mm)
Exterior Height:
70.1 inches (1780 mm)
Wheelbase:
111.5 inches (2832 mm)
Ground Clearance:
8.7 inches (221 mm) (approx., varies with suspension)
Curb Weight:
4,455 - 4,800 lbs (approx., varies by configuration)
Towing Capacity:
Up to 5,000 lbs (depending on engine and equipment)
NHTSA Frontal Crash Rating Driver:
5 Stars (2002)
NHTSA Frontal Crash Rating Passenger:
5 Stars (2002)
NHTSA Side Impact Rating Front Driver:
4 Stars (2002)
NHTSA Side Impact Rating Front Passenger:
4 Stars (2002)
Active Features:
Four-wheel disc brakes with ABS, optional Traction Control (on some models)
Passive Features:
Front airbags, optional front side airbags, seatbelt pretensioners
Infotainment Features:
Available premium audio systems, optional CD changer, available navigation system on higher trims.
Driver Assistance Features:
Anti-lock Braking System (ABS), optional Traction Control.
Connectivity Features:
Basic power accessories, available steering wheel mounted audio controls.
Service Intervals Oil Change
Service Intervals Oil Change:
Every 5,000 - 7,500 miles or 6 months, whichever comes first (refer to manual for specific oil type and viscosity).
Service Intervals Transmission Fluid
Service Intervals Transmission Fluid:
Check every oil change, replace/flush every 60,000 - 100,000 miles (refer to manual for exact interval and fluid type).
Fluid Specifications Engine Oil
Fluid Specifications Engine Oil:
SAE 5W-30 (for 4.0L and 4.7L engines, confirm specific API service classification in manual)
Fluid Specifications Coolant
Fluid Specifications Coolant:
Mopar OAT (Orange) Antifreeze/Coolant, 50/50 mixture with distilled water
Fluid Specifications Brake Fluid
Fluid Specifications Brake Fluid:
DOT 3
Known Issues 4.0L Engine:
Head gasket failures (early models), intake manifold gasket leaks, camshaft position sensor issues.
Known Issues 4.7L Engine:
Cylinder head cracking (especially earlier 4.7L versions), sludge buildup if oil changes are neglected, water pump leaks.
Known Issues Transmission
Known Issues Transmission:
Transmission solenoid issues, torque converter problems (less common but possible).
Known Issues Suspension:
Wear in front suspension components (ball joints, tie rod ends, control arm bushings), especially with higher mileage or off-road use.
Known Issues Electrical:
Wiper motor failure, instrument cluster failures, power window motor issues.
Brand Heritage:
Jeep has a long-standing reputation for robust, go-anywhere capability and rugged design, originating from its military roots in World War II.
Model Evolution:
The WJ generation (1999-2004) represented a significant evolution from the previous ZJ model, featuring a unibody construction, independent front suspension, and a more car-like ride and interior refinement, while still retaining core Jeep attributes.
Production:
The 2002-2003 models are part of the second phase of the WJ generation, featuring minor updates and powertrain refinements.
