2003 Chevrolet Astro Owner's Manual - Page 337

100,000 Miles (166 000 km) 0 Inspect spark plug wires. An Emission Control Service. 0 Replace spark plugs. An Emission Control Service. 0 If you haven't used your vehicle under severe service Long Trip/Highway Scheduled Maintenance The services shown in this schedule up to 100,000 miles (166 000 km) should be repeated after 100,000 miles (166 000 km) at the same intervals for the life of this vehicle. The services shown at 150,000 miles (240 000 km) should be repeated at the same interval after 150,000 miles (240 000 km) for the life of this vehicle. See Part 5 : Owner Checks and Serviceson page 6-26 and Part C: Periodic Maintenance Inspections on page 6-30. conditions listed previously and, therefore, haven't changed your automatic transmission fluid, change both the fluid and filter. 0 Change transfer case fluid. Cl Inspect Positive Crankcase Ventilation (PCV) valve. An Emission Control Service. 150,000 Miles (240 000 km) 0 Drain, flush and refill cooling system (or every 60 months since last service, whichever occurs first). See Engine Coolant on page 5-28 for what to use. Footnotes t Inspect hoses. Clean radiator, condenser, pressure cap and neck. Pressure test cooling system and pressure cap.An Emission Control Service. Cl Inspect engine accessory drive belt. An Emission Control Service. The U.S. Environmental Protection Agencyor the California Air Resources Board has determined that the failure to perform this maintenance item will not nullify the emission warrantyor limit recall liability prior to the completion of the vehicle's useful life. We, however, urge that all recommended maintenance services be performed at the indicated intervals and the maintenance be recorded. # Lubricate the front suspension, ball joints and kingpin bushings, steering linkage and transfer case shift linkage parking brake cable guides and brake pedal springs. + A good time to check your brakes is during tire rotation. See Brake System Inspection on page 6-31. 6-18