2003 Jeep Grand Cherokee OverlandFACTORY OEM SERVICE PROCEDURE

Service Intervals & Specifications

REPLACEMENT INTERVALS (1)

Component Months Miles
Air Filter
Normal Service 30 30,000
Severe Service (2) 15,000
Automatic Transmission
Normal Service
4.0L (2) (3) 100,000
4.7L (2) (4) 100,000
Severe Service
4.0L (2) (3) 30,000
4.7L (2) (4) 30,000
Brake Fluid
Normal Service 60 60,000
Severe Service (2) 60,000
Coolant
 
Normal Service 60 60,000
Severe Service (2) 100,000
Drive Belt
Normal Service
4.0L 60 (5) 60,000
4.7L 90 (5) 90,000
Severe Service
4.0L (2) (5) 45,000
4.7L (2) (5) 75,000
Front & Rear Axles
Normal Service (6) (6)
Severe Service (2) 12,000
Oil & Filter
Normal Service 6 6000
Severe Service (2) 3000
PCV Valve
4.7L
Normal Service 60 (7) 60,000
Severe Service (2) (7) 30,000
Spark Plugs 30 30,000
Transfer Case
Normal Service
Selec-Trac 120 120,000
Quadra-Trac 30 30,000
Severe Service
Selec-Trac (2) 60,000
Quadra-Trac (2) 30,000
(1) Different interval may be required for normal and severe service. Severe service is described as frequent short trip driving (less than 5 miles), frequent driving in dusty conditions, extensive idling, trailer towing, sustained high speed operation, off road driving, desert operation, cold climate operation and commercial service.
(2) Monthly service interval does not apply.
(3) Change fluid, filter and adjust bands.
(4) Change fluid, main sump filter and spin-on cooler return filter.
(5) Inspect and/or replace as necessary. Check every 15,000 miles afterward.
(6) Service intervals are not available from manufacturer. Check fluid level at every engine oil change.
(7) Inspect and replace if necessary.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.