🏷️ Basic Information

Make:

Dodge

Model:

Ram

Year:

2003

Platform:

DR/DH/D1/DC/DM (Third Generation Ram)

👋 Introduction

Segment:

Full-size Pickup Truck

Competitors 2003:

Ford F-Series, Chevrolet Silverado/GMC Sierra, Toyota Tundra, Nissan Titan.

Third Gen Ram Highlights:

Bold styling, large interior, improved ride comfort over previous generations, extensive powertrain options.

Intended User:

DIY mechanics, fleet managers, automotive repair shops, and owners seeking detailed maintenance and repair information.

📋 Manual Details

Coverage Scope:

All service and repair procedures for the 2003 Dodge Ram.

Estimated Page Count:

2500+

Type:

Service and Repair Manual

Language:

English

Format:

Downloadable Digital Format (PDF)

📖 Manual Coverage

Engine Systems:

Engine mechanical, lubrication, cooling, fuel, ignition, emissions, starting and charging.

Transmission Systems:

Manual transmission, automatic transmission (45RFE, 48RE), transfer case, clutch.

Drivetrain Systems:

Front and rear axle, drive shafts, differentials, propeller shafts.

Suspension Steering Brakes:

Front and rear suspension, steering system, hydraulic power steering, braking system (ABS included), parking brake.

Electrical Systems:

Battery, charging system, starting system, ignition system, lighting, instrument cluster, body control modules (BCM), power distribution, wiring diagrams.

Body Interior Exterior:

Body panels, doors, windows, seats, interior trim, HVAC system, exterior trim, bumpers, tailgate.

Fuel System Details:

Fuel pump, fuel filter, fuel injectors, fuel lines, EVAP system.

Emissions Control:

Catalytic converter, oxygen sensors, EGR system, PCM control of emissions.

Maintenance Procedures:

Scheduled maintenance, oil changes, filter replacements, fluid checks and top-offs, lubrication.

Repair Procedures:

Engine overhaul, transmission rebuild, brake caliper replacement, suspension component replacement, electrical component diagnosis and replacement.

Troubleshooting:

Diagnostic procedures for common problems, symptom-based troubleshooting charts, electrical diagnostic flowcharts.

Diagnostics:

OBD-II diagnostics, specific system diagnostics, diagnostic trouble codes (DTCs).

Special Tools:

Identification and usage of specialized tools required for specific repairs.

Engine Removal Installation:

Detailed steps for removing and reinstalling engines.

Torque Specifications:

All critical torque specifications for fasteners and engine/drivetrain components.

Wiring Diagrams:

Comprehensive electrical schematics for all systems, including color coding and connector information.

Depth:

Comprehensive: Covers everything from basic maintenance to complete engine and transmission overhauls, including detailed electrical schematics and diagnostic procedures.

Diagnostic Tools:

Guidance on using scan tools, multimeters, and specialized diagnostic equipment.

📊 Manual Specifications

File Format:

PDF (Portable Document Format)

Print Quality:

High-resolution, printable pages with clear diagrams and text.

Binding Type:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

Text Searchability:

Fully text-searchable for quick access to specific topics.

⚙️ Engine Specifications

Engine Options:

4.7L Magnum V8, 5.9L Magnum V8, 5.9L Cummins Turbo Diesel I6 (for Heavy Duty variants not explicitly covered by 'Ram' model name, but often associated).

4.7L Magnum V8:

235 hp @ 4,800 rpm, 295 lb-ft @ 3,200 rpm (approximate figures, may vary by specific calibration).

5.9L Magnum V8:

245-250 hp @ 4,000 rpm, 335-345 lb-ft @ 3,200 rpm (approximate figures, may vary by specific calibration).

Fuel Delivery:

Sequential Multi-Port Fuel Injection (MPI) for gasoline engines.

ECU:

Powertrain Control Module (PCM)

Ignition System:

Distributorless ignition system (DIS) or Coil-On-Plug (COP) depending on engine.

Turbo Diesel Spec:

Turbocharged, Intercooled (for 5.9L Cummins)

🔧 Transmission

Standard Transmission:

4-Speed Automatic (45RFE/48RE) was most common. Manual transmissions (NV3500, NV4500) were also available, particularly in certain configurations.

Optional Transmission:

5-Speed Manual (NV3500 on lighter duty, NV4500 on heavier duty applications).

Automatic Features:

Electronic overdrive, torque converter lock-up.

Manual Transmission Features:

Dual-mass flywheel (on some models), clutch assembly replacement.

Automatic Transmission Fluid:

ATF+4 (Chrysler MS-9602)

Manual Transmission Fluid:

API GL-5, SAE 75W-90 or 75W-140 depending on application and temperature.

📐 Dimensions

Body Styles:

Regular Cab, Club Cab (extended cab), Quad Cab (four-door).

Bed Lengths:

6.3 ft (standard bed), 8.0 ft (long bed).

Curb Weight:

Approx. 4,500 - 6,000+ lbs (depending on configuration).

Towing Capacity:

Up to 8,000+ lbs (depending on engine, axle ratio, and configuration).

🛡️ Safety Features

NHTSA Frontal Impact Driver:

4 Stars (for certain configurations, may vary).

NHTSA Frontal Impact Passenger:

4 Stars (for certain configurations, may vary).

ABS:

Standard Anti-lock Braking System (ABS) on all wheels for most models.

Traction Control:

Optional or standard on certain trims.

Airbags:

Driver and front passenger airbags.

Seatbelts:

Three-point seatbelts with pretensioners.

💡 Technology Features

Audio Options:

AM/FM stereo with CD player, optional Infinity premium sound system, cassette player availability.

Climate Control:

Manual HVAC controls, optional automatic climate control.

Cruise Control:

Standard on most models.

Power Accessories:

Power windows, power door locks, power mirrors available on higher trims.

Seating Features:

Manual or power adjustable seats, cloth or leather upholstery options.

🔧 Maintenance

Oil Change Interval:

Typically every 5,000 - 7,500 miles or 6 months (depending on driving conditions and oil type used). Refer to manual for exact specifications.

Tire Rotation:

Every 5,000 - 7,500 miles.

Transmission Fluid Change:

Automatic: 50,000 - 100,000 miles (heavy duty use may require more frequent changes). Manual: As needed or typically around 100,000 miles.

Engine Oil Capacity:

4.7L V8: approx. 6 quarts (5.7L). 5.9L V8: approx. 7 quarts (6.6L).

Engine Oil Viscosity:

SAE 5W-30 or 5W-20 (depending on engine and climate; consult manual for exact spec).

Coolant Type:

Chrysler HOAT (Hybrid Organic Acid Technology) coolant, typically Mopar OAT (Orange) or equivalent.

Brake Fluid Type:

DOT 3

Common Problems:

Eccentric camshaft position sensor failure (especially 4.7L), exhaust manifold leaks, water pump failures, transmission solenoid pack issues (45RFE/48RE), rust on body panels and frame.

Tune Up Components:

Spark plugs (e.g., Champion Copper Plus RN12LYC for 5.9L, Champion Iridium for 4.7L), air filter, fuel filter.

📚 Vehicle History

Dodge Truck Legacy:

Dodge has a long history of producing robust and capable trucks dating back to the 1930s.

Third Generation Introduction:

The third generation (DB) Ram was introduced for the 2002 model year, representing a significant redesign from the previous generation.

Key Design Elements:

The distinctive crosshair grille and aggressive styling characterized this generation.

Manufacturing Locations:

Saltillo, Mexico; Warren, Michigan; St. Louis, Missouri (assembly plants).

🏆 Awards & Recognition

Segment Awards:

While specific awards for the 2003 model year might be scarce, the Ram line generally received praise for its styling and Hemi engine option in later years of this generation. This manual would be crucial for maintaining it to its original standards.