1993 GMC Suburban Owner's Manual - Page 362

Perkxfk Maintenance hpections Listed belowareinspectionsandserviceswhichshouldbeperformedatleast twice a year(forinstanceeachspringorfall). You should let your GM dealer's service department or other qualified service center do these jobs: Makesureanynecessaryrepairsarecompletedatonce. ~ Steering and Suspension lnspectiont --Inspectfrontandrearsuspension andsteeringsystemfordamaged,looseormissingparts,signs ofwear or lackoflubrication.Inspectpowersteeringlinesandhosesforproperhook-up, binding,leaks,cracks,chafing,etc.(Onvehiclesequippedwithmanual steering gear,checkforsealleakage.)Lubricatethesteeringlinkage. Acce%era%or Control System -Lubricateallpivotpointswithengineoil, exceptthe TBI throttleshaft.Remove all externaldepositsfromtheinjector Do thiswhentheengine is cold pumpfacecamon6.2Land6.5Lengines. and notrunning. Do not oil anyacceleratororcruisecontrolcables.Replace any cables that have high effort or excessive wear. Exhaust System Inspection -Inspectthecompletesystemincludingthe three-waycatalyticconverter.Inspectthebodyneartheexhaustsystem. Leak forbroken,damaged,missingorout-of-positionparts, as wellas,open seams,holes,looseconnectionsorotherconditionswhich could causea (,eat buildup in thefloorpanorcould let exhaustfumesseepintothepassenger compartments. ~ Drive Axle Service -Check rearlfrontaxlefluidlevelandaddasneeded.; Checkconstantvelocityjointsandaxlesealsforleaking. Transfer Case (four-wheel drive) lnspectisnt -Every 12 monthsoratoil changeintervals,checkfrontaxleandtransfercaseandaddlubricantwhen necessary.Oilthecontrolleverpivotpoint and allexposedcontrollinkage. Checkventhoseattransfercaseforkinksandproperinstallation.More frequentlubricationmayberequired on heavy-dutyoroff-roaduse. t A fluid loss in thesesystemsmayindicateaproblem.Havetheminspected and I 7-24