1993 GMC Jimmy Owner's Manual - Page 338

Scheduled Maintenance Services Explanation Of Scheduled Maintenance Services Belowareexplanationsoftheserviceslisted in themaintenancecharts. Theproperfluidsandlubricantstousearelisted in thissection.Makesure All parts should be replaced and whoeverservicesyourvehicleusesthese. all necessaryrepairsdonebeforeyouoranyoneelsedrivesthevehicle. 1. ENGINEOILAND OIL FlLTERCHANGE* -ALWAYS USE SG OR SGlCEQUALITY,ENERGYCONSERVING II OILS OF THE PROPER VISCOSITY.Todeterminethepreferredviscosity oil foryourvehicle's engine(e.g. SAE 5W-30). See"EngineOil" in theIndex. 2. CHASSISLUBRICATION -Lubricatethefrontsuspension, ball joint, steering linkage, clutch, and transfer .case shift linkage, parking brake cableguides,propshaftsplines,universaljoints,brakepedalsprings,and clutch pedal springs at the intervals specified on the proper maintenance schedule,orateveryengine oil change,whichevercomesfirst.On vehicles without hydraulicclutches,lubricatetheclutchcrossshaftevery 30,000miles (50 000 km). Balljointsshouldnotbelubricatedunlesstheirtemperatureis 10°F (-12%) orhigher. When the weather iscold,letthemwarmupbefore lubricating them or they could be damaged. Also, besure to check all the vehicle fluid levels at this time. 3. CLUTCH FORKBALL STUDLUBRICATION (4.3L ENGINESONLY) -Lubricatetheclutchforkballstudthrobghthefittingontheclutch housing.Lubricantmustbeadded"sparingly" to thefitting,asonly ,0066 Ib. (.003kg) is required to lubricatetheballstudsurface. Do notadd lubricantmoreoftenthantheintervalsrecommended in theMaintenance Schedules. Too muchlubricant will damagetheclutchassembly. 4. COOLINGSYSTEMSERVICE* --Drain,flush andrefillthesystemwith newcoolant.See"EngineCoolant" in theIndexforthepropercoolant andmixture to use in yourvehicle. Alsoinspectthehosesandreplacethem if theyarecracked,swollen, or deteriorated.Tightenallhoseclamps.Cleantheoutsideoftheradiator To ensureproper andairconditioningcondenser.Washtheradiatorneck. operation,pressuretesttheradiatorandcap. * AnEmissionControlService 7-8