1995 GMC Sonoma Owner's Manual - Page 294

Every 60,000 Miles (100 000 km) Spark Plug Wire Inspection Engine Accessory Drive Belt Inspection Fuel Tank, Cap and Lines Inspection Engine TimingCheck Every 100,000 Miles (166 000 km) Spark Plug Replacement (2.2L Code 4 engine only) Maintenance ScheduleI The services shown in this schedule up to 100,000 miles (166 000 km) should be performed after I00,OOO miles ( 166 000 km) at the same intervals. Footnotes j- The California Air Resources Board has determined that the failure to perform this maintenance item will not nullify the emission warranty or limit recall liability prior to the completion of vehicle useful life. We, however, urge that all recommended maintenance services be performed at the indicated intervals and the maintenance be recorded. J:4: Drive axle service: Locking Differential - Drain fluid and refill at first engine oil change. At subsequent oil changes, check fluid level and add fluid as 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 oil change. If driving in dusty areas or 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 0 0 7-6