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Important: Inspection and service should also be performed any time a malfunction is observed or sus- SCHEDULE “B” Schedule “B” is for vehicles operated under the fol- lowing conditions: • Frequent short trip driving less than 5 miles (8 km) • Frequent driving in dusty conditions • Trailer towing • Extensive idling • More than 50% of driving is at sustained high speeds during hot weather, above 90°F (32°C) 3,000 Miles (5 000 km) • Change engine oil. • Replace engine oil filter. 6,000 Miles (10 000 km) • Change engine oil. • Replace engine oil filter. 9,000 Miles (14 000 km) • Change engine oil. • Replace engine oil filter. 12,000 Miles (19 000 km) • Change engine oil. • Replace engine oil filter. • Drain and refill automatic transmission fluid. Replace filter and adjust bands (5.2L & 5.9L).‡ • Drain and refill automatic transmission fluid and change filter (4.7L). • Change rear axle fluid. • Change front axle fluid (4x4). • Inspect brake linings. 15,000 Miles (24 000 km) • Change engine oil. • Replace engine oil filter. • Inspect engine air cleaner element, replace as necessary. 18,000 Miles (29 000 km) • Change engine oil. • Replace engine oil filter. 21,000 Miles (34 000 km) • Change engine oil. • Replace engine oil filter. • Inspect front wheel bearings. • Lubricate front suspension ball joints if required. 24,000 Miles (38 000 km) • Change engine oil. • Replace engine oil filter. • Drain and refill automatic transmission fluid. Replace filter and adjust bands (5.2L & 5.9L).‡ • Drain and refill automatic transmission fluid and change filter (4.7L). • Change rear axle fluid. • Change front axle fluid (4x4). • Inspect brake linings. 27,000 miles (43 000 km) • Change engine oil. • Replace engine oil filter. 30,000 Miles (48 000 km) • Change engine oil. • Replace engine oil filter. • Replace engine air cleaner element. • Replace spark plugs. • Inspect PCV valve, replace as necessary.* 33,000 Miles (53,000 km) • Change engine oil. • Replace engine oil filter. 36,000 Miles (58 000 km) • Change engine oil. • Replace engine oil filter. • Drain and refill automatic transmission fluid. Replace filter and adjust bands (5.2L & 5.9L).‡ • Drain and refill automatic transmission fluid and change filter (4.7L). • Drain and refill transfer case fluid. • Change rear axle fluid. • Change front axle fluid (4x4). • Inspect brake linings. 39,000 Miles (62 000 km) • Change engine oil. • Replace engine oil filter. 42,000 Miles (67 000 km) • Change engine oil. • Replace engine oil filter. 45,000 Miles (72 000 km) • Change engine oil. • Replace engine oil filter. • Inspect front wheel bearings. • Lubricate front suspension ball joints if required. • Inspect engine air cleaner element, replace as necessary. DN LUBRICATION AND MAINTENANCE 0 - 5 SERVICE PROCEDURES (Continued) |