1998 GMC Sonoma Owner's Manual - Page 363

1998 GMC Sonoma Manual

Page 363 highlights

Long Tripmighway Maintenance Schedule 150,000 Miles (240 000 km) 1 I DATE MILEAGE 0 Drain, flush and refill cooling system (or every 60 months since last service, whichever occurs first). See"Engine Coolant" in the Index for what to use. Inspect hoses. Clean radiator, condenser, pressure cap neck. Pressure test and the cooling system and pressure cap. An Emission Control Service. 7-41

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