1997 Chevrolet Tahoe Owner's Manual - Page 382

I Short TripKity Maintenance Schedule-- Gasoline Engines I 150,000 Miles (240 000 km) - In hilly or mountainous terrain. - 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. When doing frequent trailer towing. Uses such as found in taxi, police or delivery service. I f you do not use your vehicle under any of these conditions, thefluid andfilter not do require changing. 0Inspect Positive Crankcase Ventilation ( P c v ) valve. An Emission Control Service. DATE ACTUAL MILEAGE SERVICED BY: DATE ACTUAL MILEAGE SERVICED BY: