GMC 1993 Suburban Owner's Manual page 358

13. EGW SYSTEM INSPECTION* -Conduct EGR SYSTEM CHECK as
described in the Service Manual.
14. ELECTRONIC WACblblM
REGULATOR VALVE (EVRV) INSPECTION*
-Inspect filter for excessive contamination or plugging. If required, clean
element with a solution of biodegradable soap and water, let dry and
reinstall element.
MODELS)* -Adjust timing to underhood label specifications. Inspect the
inside and outside of the distributor cap and rotor for cracks, carbon
tracking and corrosion. Clean or replace as needed.
15. ENGINE T8MlMG CHECK AND DISfRlBUTOR CHECK (SOME
16. FUEL TANK, CAB AND LINES INSPECTION* -Inspect the fuel tank,
cap and lines for damage or leaks. Remove fuel cap, inspect gasket for
an even filler neck imprint, and any damage. Replace parts as needed.
17. THERMOSTATICALLY CONTROLLED AI R CLEANER INSPECTION"
A-(If so equipped.) Inspect all hoses and ducts for proper hookup.
Make sure valve works properly.
18. ENGINE ACCESSORY DRIVE BELT(S)
INSPECTION* -Inspect belts.
Look for cracks, fraying, wear, and proper tension. Adjust or replace as
needed.
19. EVAPORATIVE CONTROL SYSTEM (ECS) INSPECTION* -Check all
fuel and vapor lines and hoses for proper hookup, routing, and condition.
Check that the purge valve works properly, if equipped. Replace as
needed.
shields and underhood insulation for damage or looseness. Adjust or
replace as required.
21. AIR INTAKE SYSTEM INSBECTIOMAP-Check the air intake system
installation to see that gaskets are seated properly and all hose
connections, fasteners, and other components are tight. Also check to be
sure that the air cleaner housing is properly seated, that the cover fits
tightly, and the wing nuts are tight. Tighten connections and fasteners or
replace damaged parts as required.
20.
SHIELDS AND UNDERHOOD INSULATION IMSPECVlON A
22.
THERMOSTATICALLY CONTROLLED ENGINE COOLING FAN
IMSPECTIONA -(If so equipped.) With the engine off and below
normal operating temperature, check to see that the fan can be rotated
by hand on fluid coupling or viscous drives, Replace
as necessary.
*An Emission Control Service
,A Also a Noise Emission Control Service
Applicable only to vehicles sold in the United States
7-31)