Service Intervals
WARNING: This page does not describe the selected car, but rather 19 other vehicles, including the 1987 Pontiac Sunbird, 1987 Pontiac Grand Am, 1987 Pontiac Firebird, 1987 Pontiac Fiero, and 1987 Pontiac 6000. However, it is still accessible from the selected car via links, so may be relevant.
Check fluid level at 3 month/3000 mile intervals. Draining and refilling is not required, except at time of overhaul or service.
On Corvette, change fluid in overdrive unit every 30,000 miles. On Nova, change fluid in transaxle every 20,000 miles.