1996 Buick Regal Owner's Manual - Page 320

I Long Tripmighway Maintenance Schedule 100,000 Miles (166 000 km) 0Drain, flushand refill cooling system (or every 60 months sincelast 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 the cooling system and pressure cap. An Emission Control Service. P 17 Change automatic transaxle fluid and filter if the vehicle is mainly driven under one or more of these conditions: - In heavy city traffic where the outside temperature regularly reaches 90 O F (32 O C) or higher. - In hilly or mountainous terrain. - When doing frequent trailer towing. - Uses such as found in taxi, police or delivery service. If you do not your vehicle under any these use of conditions, the fluid andfilter do require changing. not 3- 0Inspect spark plug wires. An Emission Control Service. Replace spark plugs. An Emission Control Service. 7-34