1996 Pontiac Grand Prix Owner's Manual - Page 331

I Long Trip/Highway qaintenance Schedule 30,000 Miles (50 000 km) Change engine oil and filter (or every 12 months, whichever occursfirst). An Emission Control Service. I 37,500Miles (62 500 km) 0Change engine oil and filter (or every 12 months, whichever occurs first). An Emission Control Service. 0Lubricate steering ball joints (or every 6 months, whichever occurs first). 0Replace air cleaner .filter. An Emission Control Service. 0Lubricate steering ball joints (or every 6 months, whichever occurs first). 0Rotate tires. See "Tire Inspection and Rotation" in the Index fur proper rotation pattern and additional information. During tire rotation, check brake calipers for freedom of movement. Refer to the appropriate GM service manual for proper caliper service procedures. Inspect h e 1 tank, cap and lines for damage or leaks. Inspect fuel cap gasket for any damage. Replace parts as needed. An Emission Control Service.