Positioning:
Essential technical resource for Dodge Ram 2003 owners and professional mechanics seeking accurate repair and maintenance information.
Competitors:
Haynes, Chilton, AllData, Mitchell OnDemand (This manual aims to provide factory-level detail)
Features:
Detailed step-by-step repair procedures, comprehensive diagnostic flowcharts, extensive wiring diagrams, torque specifications, fluid types and capacities, maintenance schedules.
Powertrain:
Engine mechanical, fuel system, cooling system, exhaust system, transmission (automatic and manual), transfer case (4x4 models)
Chassis:
Suspension (front and rear), steering system, brake system (hydraulic, ABS), wheels and tires
Electrical:
Battery, charging system, starting system, ignition system, lighting, instrument cluster, body control modules, powertrain control modules (PCM), anti-theft systems, audio system, HVAC controls
Body:
Body exterior panels, interior trim, doors, windows, seats, bumpers, glass, HVAC ducting
Maintenance:
Oil change, filter replacement, fluid checks and changes, tire rotation, spark plug replacement, belt inspection and replacement, lubrication
Troubleshooting:
Diagnostic trouble codes (DTCs), symptom-based troubleshooting, wiring diagrams, component testing
Repair:
Component removal and installation, system diagnostics and repair, overhaul procedures for major components
Rebuilding:
Engine rebuild specifications, transmission overhaul procedures
Depth:
Comprehensive: from basic maintenance to in-depth engine and transmission rebuilds, including electrical schematics and diagnostic procedures.
Format:
Print, likely bound
Quality:
Professional printing, clear diagrams and text
Type:
Hardcover or Softcover, Smyth-sewn or coil binding for lay-flat use
Type:
Durable, high-quality paper stock suitable for workshop environments
Engine Option 1:
4.7L V8 Magnum (SOHC)
Engine Option 2:
5.9L V8 Magnum (OHV)
Engine Option 3:
3.7L V6 Magnum (SOHC) - Primarily for Ram 1500
4.7L V8 Horsepower:
~235 hp @ 4800 rpm
4.7L V8 Torque:
~300 lb-ft @ 3200 rpm
5.9L V8 Horsepower:
~245-250 hp @ 4000 rpm
5.9L V8 Torque:
~335-345 lb-ft @ 3200 rpm
Fuel Delivery Type:
Multi-Point Fuel Injection (MPFI)
Fuel Type:
Unleaded Gasoline (Regular)
Bore Stroke 4.7L:
3.66 in x 3.43 in (93 mm x 87 mm)
Bore Stroke 5.9L:
3.92 in x 3.58 in (99.5 mm x 90.9 mm)
Compression Ratio 4.7L:
9.1:1
Compression Ratio 5.9L:
8.7:1
Transmission Option 1:
4-Speed Automatic (42RE, 44RE, 45RFE/545RFE)
Transmission Option 2:
5-Speed Manual (NV3500, G360)
Transfer Case Type:
Part-time 4WD (NV241DHD/HD, NV235)
Automatic Transmission Fluid Type:
ATF+4 (MS-9602)
Automatic Transmission Fluid Capacity:
Approximately 12-14 quarts (depending on model and cooling system)
Body Styles:
Regular Cab, Extended Cab (Club Cab), Crew Cab
Bed Lengths:
6.5 ft, 8.0 ft
Wheelbase Options:
118.9 in, 134.9 in, 154.9 in
Curb Weight Range:
Approximately 4,500 - 6,000 lbs (depending on configuration)
Gross Vehicle Weight Rating Gvw:
Ranging from 6,000 lbs (1500) to 8,800 lbs (3500)
NHTSA Frontal Driver Side Impact:
4/5 Stars (for most configurations)
NHTSA Frontal Passenger Side Impact:
4/5 Stars (for most configurations)
ABS:
Standard on most models
Airbags:
Driver and front passenger airbags (standard)
Seatbelts:
3-point front and rear seat belts
Audio System:
AM/FM stereo, CD player, optional cassette player, optional Infinity premium sound system.
Cruise Control:
Standard on most trims
Trailer Tow Features:
Optional trailer tow package including heavy-duty cooling, trailer brake controller pre-wiring, trailer mirrors.
Communications:
Optional SiriusXM Satellite Radio (post-launch availability for some).
Oil Change Interval:
Every 3,000 - 7,500 miles or 6 months, depending on oil type and driving conditions (refer to manual for specific recommendations).
Transmission Fluid Change:
Every 30,000 - 60,000 miles or 3-5 years (severe use recommendations apply).
Spark Plug Replacement:
Refer to engine type: 4.7L ~100,000 miles (original spark plugs); 5.9L ~30,000 miles (typical spark plugs).
Engine Oil Type:
SAE 5W-30 or 5W-40 for 4.7L/3.7L, SAE 10W-30 or 10W-40 for 5.9L (refer to manual for exact viscosity and API service category).
Coolant Type:
Mopar OAT (Orange) Antifreeze/Coolant 5-Year/100,000 Mile Formula (MS-9769) or equivalent.
Common Issues 4.7L:
Cylinder head cracking (especially early models), camshaft position sensor failures, oil sludge buildup if maintenance is neglected.
Common Issues 5.9L:
Valve seat recession (older engines), intake manifold gasket leaks, occasional coolant leaks.
Common Issues Transmission:
Overdrive clutch failure in 45RFE/545RFE transmissions, torque converter shudder.
Common Issues Chassis:
Ball joint wear, tie rod end wear, exhaust manifold leaks (especially on V8s).
Brand Significance:
Dodge has a long history of producing robust and capable trucks, with the Ram nameplate synonymous with durability and work ethic.
Third Generation Start:
The 2003 model year represents the third generation of the Dodge Ram (introduced for the 2002 model year), featuring a significant redesign with a more aggressive styling and improved chassis.
Manufacturing Locations:
Saltillo Truck Plant (Mexico), Warren Truck Assembly Plant (Michigan, USA)
Truck Of The Year:
While specific awards for the 2003 model might vary, the Ram platform consistently received accolades for its design, capability, and value in the light-duty truck segment during this era.
Consumer Reports Reliability:
Mixed; generally good for powertrain durability, but some reported issues with certain electrical components and suspension parts.
