1993 Chevrolet Suburban Owner's Manual - Page 361

Scheduled Maintenance Services Periodic Maintenance Inspections Listed belowareinspectionsandserviceswhichshouldbeperformed at least twice ayear(forinstanceeachspringorfall). You shouldletyourGM dealer's service department or other qualified service center do these jobs. Makesureanynecessaryrepairsarecompletedatonce. Steering and Suspension lnspectiont -Inspect front and rear suspension andsteeringsystem for damaged,loose or missingparts,signs ofwearor lackoflubrication.Inspectpowersteeringlinesandhosesforproperhook-up, binding,leaks,cracks,chafing,etc.(Onvehiclesequippedwithmanual steering gear,check forsealleakage.)Lubricatethesteeringlinkage. AcceleratorControlSystem -Lubricateallpivotpointswithengineoil, exceptthe TBI throttleshaft.Remove all externaldepositsfromtheinjector Do this when theengine is cold pumpfacecamon6.2Land6.5Lengines. andnotrunning. Do notoilanyaccelerator or cruisecontrolcables.Replace or excessivewear. any cables that have high effort Exhaust System Inspection -Inspect the complete system including the three-waycatalyticconverter.Inspectthebodynear the exhaustsystem.Look forbroken,damaged,missing or out-of-positionparts, as wellas,open seams,holes,looseconnections or otherconditionswhichcouldcauseaheat into the passenger buildup in the floor pan or couldletexhaustfumesseep compartments. Drive Axle Service -Check readfront axle fluidlevelandadd Check constant velocity joints and axle seals for leaking. asneeded. TransferCase(four-wheel drive) lnspectiont -Every 12 months or at oil changeintervals,checkfrontaxleandtransfercaseandaddlubricantwhen necessary. Oil thecontrolleverpivotpointandallexposedcontrollinkage. Checkventhoseattransfercaseforkinksandproperinstallation.More or off-road use. frequentlubrication mayberequiredonheavy-duty t A fluid loss in thesesystemsmayindicateaproblem.Havetheminspected andrepairedatonce. 7-24