Fuel Fill; Fuel Lines - GMC G VAN Manual

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G V GMT 600
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The completed fuel system is certified to be in compliance with the Federal and California Vehicle Emission Standards. Any alterations to
systems or components and their environment could void compliance. Systems include:
• Fuel tank, metering unit, lines including purge control solenoids and canister or canisters.
Environment Includes:
• Heat sources, heat shields, system component relocation.
For these reasons, NO ALTERATION OF THE FUEL SYSTEM IS RECOMMENDED.
If the fuel system is received from the manufacturer in an incomplete condition, certification becomes the responsibility of the
intermediate or final stage manufacturer.

Fuel Fill

Fuel tank filler pipe location should be so situated and constructed as to prevent gasoline vapor from emitting to vents of pilot flamed
devices and to body and engine compartment air inlets.
It is recommended that when mounting the fuel filler pipe assembly and vent hose that a minimum of 3.0 in. clearance be provided to any
body component to prevent contact between hoses and/or mating parts and that retention be provided to ensure routing and prevent
failure due to wear and fatigue. Filler pipe and vent line must have a gravity fuel flow to tank at all times; no fuel traps are allowed.
Alterations of fuel line routings could affect the completed vehicle and are, therefore, not desirable. The complete fuel system must
comply with FMVSS 301 as well as Federal and C.A.R.B. vapor emission requirements.
This vehicle is equipped with concentric fuel fill and vapor lines made from special materials in order to meet the Federal and California
Evaporative Emission Standards. Changing the length, material, and/or routing of the fuel fill will require evaporative emission validation
by the final stage manufacturer.

Fuel Lines

Fuel line routing precautions:
• 12 in. minimum clearance to exhaust system is required or a metal shield must be provided.
• Fuel lines should be clipped (every 600 mm or less) to prevent chafing. Metal clips must have rubber or plastic liners.
G Van (GMT 600) 2002
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