GMC 1998 Savana Van Owner's Manual page 345

Long Trir'Highway Maintenance Schedule
.
Gasoline Engines
I
Rotate tires. See "Tire Inspection and Rotation" in the Index for proper
0
Inspect engine accessory drive belt.
0
Replace fuel filter.
0
Replace air cleaner filter.
rotation pattern and additional information. (See footnote +.)
An Emission Control Service.
An Ernission Control Service. (See footnote?.)
An Emission Control Service.
0
Inspect fuel tank, cap and lines for damage or leaks. Inspect fuel cap gasket
for any damage. Replace parts as needed.
An Emission Control Service. (See footnote"f)
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 Emission Control Service. Applicable only to vehicles sold in the
United States.
the service manual.
An
Emission Control Service. (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 footnote?.)
Conduct Exhaust Gas Recirculation (EGR) system inspection as described in
7-33