🏷️ Basic Information

Make:

Jeep

Model:

Grand Cherokee

Chassis Code:

WG

Model Years Covered:

1999, 2000, 2001, 2002, 2003, 2004

Generation Name:

Second Generation (WJ)

Ws Code:

WSM (Workshop Manual)

👋 Introduction

Vehicle Segment:

Mid-size Luxury SUV

Target Audience:

Families, off-road enthusiasts, luxury SUV buyers

Key Competitors:

Ford Explorer, Chevrolet Blazer, Toyota 4Runner, Nissan Pathfinder, Land Rover Discovery

Vehicle Strengths:

Strong off-road capability, powerful engine options, comfortable ride, spacious interior, premium materials (in higher trims).

Manual Value Proposition:

Provides in-depth technical knowledge essential for maintaining and repairing the Jeep Grand Cherokee WG, enabling cost savings and ensuring proper vehicle upkeep.

📋 Manual Details

Primary Coverage:

Full service, repair, and maintenance

Geographic Focus:

North America and Global Markets (as WG chassis was primarily for export/specific markets outside North America, though often referred to as WJ in context)

Estimated Page Count:

Over 2000 pages (typical for comprehensive WSM)

Manual Type:

Factory-authorized Workshop Service Manual (WSM)

Language:

English

Format:

Digital (PDF)

📖 Manual Coverage

Powertrain:

Engine mechanical (including disassembly, assembly, component testing), fuel system, ignition system, cooling system, exhaust system, engine performance diagnostics, powertrain control module (PCM) and related sensors, transmission (automatic and manual, if applicable), transfer case, drive shafts, differentials, axles.

Chassis And Suspension:

Front and rear suspension systems (including Quadra-Coil, solid axle, independent front suspension - IFS where applicable for WG variant), steering system, braking system (ABS, brake component inspection and replacement), wheel alignment specifications.

Body And Interior:

Body structure, exterior panels, doors, hinges, latches, glass, interior trim, seats, airbags, climate control system (HVAC), power accessories (windows, locks, mirrors, seats), body control module (BCM).

Electrical And Electronics:

Complete electrical schematics, wiring diagrams, diagnostic procedures for all electronic control units (ECUs), lighting system, instrumentation, audio system, charging system, starting system, battery maintenance, power distribution.

Maintenance:

Scheduled maintenance intervals, fluid level checks and changes, filter replacements (oil, air, fuel, cabin), spark plug replacement, lubrication points, tire rotation, brake inspection.

Diagnostics:

Troubleshooting guides based on symptoms, diagnostic trouble codes (DTCs) and their meanings, using scan tools, component testing procedures (resistance, voltage, continuity), emissions system diagnostics.

Repair:

Step-by-step repair procedures for all major systems, including engine overhaul, transmission rebuild, suspension component replacement, brake caliper and rotor replacement, electrical component repair, body panel repair and replacement, HVAC system servicing.

Special Procedures:

Wheel alignment specifications and procedures, jacking and lifting points, towing information, refrigerant handling for HVAC, programming of electronic modules.

Depth Of Coverage:

Comprehensive, from basic maintenance to full engine and transmission rebuilds, including detailed diagnostic trees and torque specifications.

Diagnostic Tools:

Details on using factory diagnostic tools (e.g., StarSCAN equivalent for Chrysler/Jeep products of that era) and generic OBD-II scanners.

📊 Manual Specifications

File Type:

Searchable PDF

Print Quality:

High-resolution scans, suitable for printing individual sections or the entire manual.

Binding Type:

N/A (Digital format)

Paper Type:

N/A (Digital format)

⚙️ Engine Specifications

Engine Code And Type:

4.7L V8 SOHC (PowerTech) - P-Code Engine

Displacement:

4.7 Liters (287 cu in)

Horsepower:

Approx. 235 hp @ 4500 rpm

Torque:

Approx. 300 lb-ft @ 3200 rpm

Engine Code And Type:

4.0L Inline-6 OHV (242 CID) - AMC 242 Engine

Displacement:

4.0 Liters (242 cu in)

Horsepower:

Approx. 190 hp @ 4600 rpm

Torque:

Approx. 235 lb-ft @ 3200 rpm

Compression Ratio 4.7L:

9.0:1

Compression Ratio 4.0L:

8.8:1

Fuel Delivery:

Sequential Multi-Port Fuel Injection (MPI)

Fuel Type:

Unleaded gasoline

Recommended Octane:

87 octane (minimum), 89 recommended for 4.7L for optimal performance

🔧 Transmission

Type:

4-speed Automatic (42RE/44RE variants for 4.0L, 45RFE for 4.7L)

Type:

5-speed Manual (NV3550) - Less common, primarily with the 4.0L engine.

Transmission Fluid Type Auto:

ATF+4 (MS-9602) or equivalent Mopar approved fluid.

Transfer Case Options:

Selec-Trac (NV242) or Quadra-Trac II (NV247) with varying levels of 4WD engagement.

📐 Dimensions

Length:

Approx. 185.6 inches (4714 mm)

Width:

Approx. 74.8 inches (1899 mm)

Height:

Approx. 67.5 inches (1715 mm)

Wheelbase:

Approx. 111.5 inches (2832 mm)

Curb Weight 4.0L:

Approx. 4,250 - 4,500 lbs (1928 - 2041 kg)

Curb Weight 4.7L:

Approx. 4,400 - 4,700 lbs (1996 - 2132 kg)

Gross Vehicle Weight Rating Gvwr:

Approx. 5,800 - 6,200 lbs (2630 - 2812 kg)

Cargo Volume Behind 2Nd Row:

Approx. 37.5 cu ft (1.06 m³)

Cargo Volume Max With 2Nd Row Folded:

Approx. 77.7 cu ft (2.20 m³)

🛡️ Safety Features

NHTSA Front Impact Driver:

Good (4/5 stars) for 1999-2001 models, but specific ratings vary by year and testing protocol.

NHTSA Front Impact Passenger:

Good (4/5 stars) for 1999-2001 models.

IIHS Front Offset Test:

Acceptable to Good, depending on the specific year and testing criteria.

ABS:

Standard on all models (4-wheel disc brakes with ABS).

Traction Control:

Optional on some models, integrated with ABS.

Electronic Stability Control Esc:

Became available on later models or as an option, referred to as 'Electronic Stability Program' (ESP).

Airbags Front:

Standard front airbags for driver and passenger.

Airbags Side:

Optional front side-impact airbags on some models.

Seatbelts:

3-point seatbelts for all occupants, with pretensioners for front seats.

💡 Technology Features

Audio System:

AM/FM stereo with CD player, optional Infinity Gold premium audio system with subwoofer, optional cassette player.

Navigation System:

Optional factory-installed GPS navigation system.

Cruise Control:

Standard electronic cruise control.

Parking Sensors:

Optional rear parking assist sensors.

Connectivity Options:

No integrated Bluetooth or USB ports in this era; aftermarket solutions common.

🔧 Maintenance

Oil Change Interval Synthetic:

7,500 miles (12,000 km) or 6 months, whichever comes first (with synthetic oil).

Oil Change Interval Conventional:

3,000 miles (4,800 km) or 3 months, whichever comes first (with conventional oil).

Air Filter Replacement:

15,000 miles (24,000 km) or 12 months, inspect more frequently in dusty conditions.

Spark Plug Replacement 4.0L:

Approx. 100,000 miles (160,000 km) with platinum-tipped spark plugs.

Spark Plug Replacement 4.7L:

Approx. 100,000 miles (160,000 km) with platinum-tipped spark plugs.

Transmission Fluid Change:

40,000 - 60,000 miles (64,000 - 96,000 km), or more frequently if used for towing or severe duty.

Engine Oil Capacity:

4.0L: 5 quarts (4.7L) with filter; 4.7L: 6 quarts (5.7L) with filter.

Engine Oil Viscosity:

10W-30 for most conditions (check specific owner's manual for extreme temperatures).

Coolant Type:

Mopar OAT (Olds Antifreeze Technology) HOAT or equivalent long-life coolant (e.g., Pentofrost G12/G12+ compatible).

Brake Fluid Type:

DOT 3

Common Problems Engine 4.0L:

Cracked cylinder heads (less common on WJ than ZJ), oil filter housing leaks, radiator leaks, exhaust manifold cracks.

Common Problems Engine 4.7L:

Water pump failure, valve guide wear leading to oil consumption, intake manifold gasket leaks, catalytic converter failure, camshaft position sensor failure.

Common Problems Transmission:

Overheating of the 45RFE transmission, solenoid pack issues, torque converter shudder.

Common Problems Suspension Steering:

Worn ball joints, tie rod ends, control arm bushings, death wobble (on solid front axle models, less common on IFS equipped WG), power steering pump leaks.

Common Problems Electrical:

Window regulator failure, faulty power mirror motors, instrument cluster failure (dead pixels), HVAC blower motor resistor failure, ABS sensor issues.

📚 Vehicle History

Jeep Legacy:

Jeep has a storied history of producing rugged, off-road capable vehicles, dating back to its military origins in World War II.

Grand Cherokee Lineage:

The Grand Cherokee was introduced as a more luxurious and comfortable alternative to the Cherokee (XJ), bridging the gap between utility and comfort.

Wj Generation Introduction:

The WJ generation (1999-2004) represented a significant redesign, featuring a more aerodynamic and rounded body style, a refined interior, and improved on-road manners compared to its predecessor (ZJ).

Production Locations:

Primarily assembled at the Jefferson North Assembly Plant in Detroit, Michigan, USA.

Production Timeline:

1999-2004

🏆 Awards & Recognition

Popular Mechanics Car Of The Year:

Jeep Grand Cherokee named Popular Mechanics Car of the Year for 1999.

Motor Trend SUV Of The Year:

While not a specific win for the WJ in its launch year, it was considered a strong contender in the evolving SUV market.