UPDATE-MAINTENANCE SCHEDULE INFO. (REPLACEMENT PAGES)

Model and Year: 1989 M-CAR

TO: ALL CHEVROLET DEALERS

This bulletin provides replacement pages OB-2, OB-3 and OB-4 for the 1989 GEO Metro Service Manual.

Cooling System Service

Drain, flush and refill system with new coolant. See Recommended Fluids and Lubricants, or Section 6B.

Transaxle Service

The manual transaxle fluid requires changing every 12,000 miles (20,000 km) under severe conditions.

For automatic transaxle change both the fluid and filter every 15,000 miles (25 000 km) if the car is mainly driven under one or more of these conditions.

In heavy city traffic where the outside temperature regularly reaches 90 DEG F (32 DEG C) or higher.

In hilly or mountainous terrain.

If the car is not used under any of these conditions, change both the fluid and filter (or service the screen) every 100,000 miles (160 000 km). See Section 7A for more information.

Clean wires and inspect for bums, cracks or other damage. Check the wire boot fit at the distributor and/or coil, and at the spark plugs. Replace the wires as needed.

Positive Crankcase Ventilation (PCV) Inspection

No service required.

Air Cleaner and PCV Filter Replacement

Inspect valve for proper function. Replace valve if necessary. Also, replace any wom, plugged or collapsed hoses.

EGR System Service

1.0L (VIN 6) - Perform EGR System check. See Section 6E2 or 6E3, Chan C7.

Air Cleaner and PCV Filter Replacement

Replace the air cleaner filter every 30,000 miles (50 000 km). Replace more often under dusty conditions.

Replace the crankcase vent filter if so equipped.

Engine Timing Check

Adjust timing to underhood label specifications.

Fuel Tank, Cap and Lines Inspection

Inspect fuel tank, cap and lines for damage or leaks. Inspect fuel rails and injection assemblies, if so equipped. Inspect fuel cap gasket for an even filler neck imprint or any damage. Replace parts as needed.

Thermostatically Controlled Air Cleaner

If equipped

Inspect all hoses and ducts for proper hook-up. Make sure valve works properly.

OWNER INSPECTION AND SERVICES

Listed below are vehicle inspections and services which should be made at the frequencies indicated by either the owner or a qualified technician to help ensure proper safety, emission performance and dependability of the vehicle. Whenever repairs are necessary, have them completed at once.

Any safety related or emissions related components that could have been damaged in an accident should be inspected and all needed repairs should be performed before operating the vehicle.

WHILE OPERATING THE CAR

Automatic transaxle shift indicator operation - Make sure the indicator points to the gear chosen.

Horn operation - Blow the horn occasionally to make sure it works. Check all button locations.

Brake system operation - Be alert to abnormal sounds, increased brake pedal travel or repeated pulling to one side when braking. Also, if the brake warning light goes on, or flashes, something may be wrong with part of the brake system.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.