1997 Chevrolet Blazer Owner's Manual - Page 348

Short TriplCity Maintenance Schedule I 150,000 Miles (240 000 km) - When doing frequent trailer towing. - Uses such as found in taxi, police or 0Drain, 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 and neck. Pressure test cooling system and pressure cap. An Emission Control Service. delivery service. If you do not use your vehicle under- any of these conditions, the fluid and filter do not require changing. Manual transmission fluid doesn't require change. 0Inspect Positive Crankcase Ventilation (Pcv)valve. An Emission Control Service. DATE ACTUAL MILEAGE SERVICED BY I DATE 1 ACTUAL MILEAGE ISERVICED BY:l 7-29