GM Service Manual Online
For 1990-2009 cars only

(a) A fluid loss in any vehicle system could indicate a problem. Have the system inspected and repaired and the fluid level checked. Add fluid if needed.

(b) If driving regularly under dusty conditions or in high-polluted regions, replace the filter at each engine oil change.

(c) Inspect brake lines and hoses for proper hook-up, binding, leaks, cracks, chafing, etc. Inspect disc brake pads for wear and rotors for surface condition. Inspect other brake parts, including calipers, parking brake, etc.

(d) Inspect front and rear suspension and steering system for damaged, loose, or missing parts or signs of wear. Inspect power steering cables for proper hook-up, binding, cracks, chafing, etc. Inspect power steering hydraulic lines and hoses for proper hook-up, binding, leaks, cracks, chafing, etc.

(e) Inspect hoses and have them replaced if they are cracked, swollen, or deteriorated. Inspect all pipes, fittings and clamps; replace with genuine parts as needed. To help ensure proper operation, a pressure test of the cooling system and pressure cap and cleaning the outside of the radiator and air conditioning condenser is recommended at least once a year.

(f) Inspect wiper blades for wear, cracking, or contamination. Clean the windshield and wiper blades, if contaminated. Replace wiper blades that are worn or damaged. See Windshield Wiper Blade Replacement and "Windshield and Wiper Blades" in Exterior Cleaning .

(g) Make sure the safety belt reminder light and safety belt assemblies are working properly. Look for any other loose or damaged safety belt system parts. If you see anything that might keep a safety belt system from doing its job, have it repaired. Have any torn or frayed safety belts replaced. Also see Airbag System Check .

(h) Lubricate all key lock cylinders, door hinges and latches, hood hinges and latches, and trunk lid hinges and latches. More frequent lubrication may be required when exposed to a corrosive environment. Applying silicone grease on weatherstrips with a clean cloth will make them last longer, seal better, and not stick or squeak.

(i) Change automatic transmission fluid if the vehicle is mainly driven under one or more of these conditions:

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

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In hilly or mountainous terrain.

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When doing frequent trailer towing.

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Uses such as found in taxi, police, or delivery service.

(j) Drain, flush, and refill cooling system. This service can be complex; you should have your dealer/retailer perform this service. See Engine Coolant for what to use. Inspect hoses. Clean radiator, condenser, pressure cap, and filler neck. Pressure test the cooling system and pressure cap.

(k) Inspect belt for fraying, excessive cracks, or obvious damage. Replace belt if necessary.

(l) Drain, flush, and refill brake/clutch hydraulic system at a regular service interval (I or II) every two years. This service can be complex; you should have your dealer/retailer perform this service. See Brakes .

(m) This service can be complex; you should have your dealer/retailer perform this service.