1998 GMC Suburban Owner's Manual - Page 397

1 LungTrip/Highway Vaintmance Sqhedule -- Gasoline Engines 0 Replace fuel filter. An Emission Control .Ser\>ico.(See footnote?.) 0 Inspect fuel tank, cap and lines for damage or leaks. Inspect fuel cap gasket for any damage. Replace parts as needed. A11 Emission Cmtrol Sel-\?ic'e. (See footnote?.) 0 Vehicles With GVWR Above 8,500 lbs. Only: Inspect shields and underhood insulation for damage or looseness.Adjust or replace as required. This is a Noise Ewis.siot1 Control Srr\jice. Applic*crhleon!\. to \!c~hiclc.s sold in the Uuitecl Stutes. 0 Conduct Exhaust Gas Recirculation (EGR) system inspection as described in the service manual. An Emission Colztrd Ser-vice. (See footnote*.) 0 Conduct evaporative control system inspection. Check all fuel and vapor lines and hoses for proper hook-up, routing and condition. Check that the purge valve works properly, if equipped. Replace as needed. An Emission Control Service. (See footnotej-.) 1 67,500 Miles (112 500 km) 0 Change engine oil and filter (or every 12 months, whichever occurs first). MILEAGE A n Emission CoI7tt-oI Senlice. 0 Lubricate chassis components (or every 12 months, whichever occurs first). (See footnote #.) (Continued) 7-33