1996 Chevrolet S10 Pickup Owner's Manual - Page 302

I ShortTrip/CityMaintenanceSchedule I The services shown in this schedule up to 100,000 miles ( 166 000 km) should be performed after 100,000 miles (166 000 km) at thesame intervals. ** Drive axle service: 0 Footnotes -f- The U.S. Environmental Protection Agencyor the California AirResources Board has determined that the failure to perform this maintenance item will not nullify the emission warrantyor limit recall liability priorto the completion of the vehicle's useful life. We, however, urge that all recommended maintenance services be performed at the indicated intervals and the maintenance be recorded. 0 Locking Differential -- Drain fluid and refill at first engine oil change. At subsequent oil changes, check fluid level and add fluidas needed. If driving in dusty areas or towing a trailer, drain fluid and refill every 15,000 miles (25 000 km). Standard Differential -- Check fluid level and add fluid as needed at every change. If driving in oil dusty areasor towing a trailer, drain fluid and refill every 15,000 miles (25 000 km). More frequent lubrication may be required for heavy-duty or off-road use. 0