1993 GMC Safari Owner's Manual - Page 261
1993 GMC Safari Manual
Page 261 highlights
Rear Axle When to Check and Change Lubricant: RefertotheMaintenanceScheduletodeterminehowoftentocheckthe lubricantandwhentochange it. See"ScheduledMaintenanceServices" theIndex. How to Check Lubricant: in K3198 If thelevelisbelowthebottom of thefillerplughole,you'llneedtoadd somelubricant.Addenoughlubricanttoraisetheleveltothebottom fillerplughole. What to Use: RefertotheMaintenanceSchedule to determinewhatkind use.See"RecommendedFluidsandLubricants"intheIndex. of the of lubricantto All- Wheel Drive If youhaveanall-wheeldrivevehicle,besuretoperformthelubricant checksdescribedinthissection.However,theyhavetwoadditionalsystems thatneedlubrication. Transfer Case When to Check Lubricant: RefertotheMaintenanceScheduletodeterminehowoftentocheckthe lubricant.See"PeriodicMaintenanceInspections"intheIndex. 6-23