GMC GMT 610, Manual

Page: 16 / 80

G/H Van (GMT 610) 2005 – Revised 08/2005
G/H V
AN
(
GMT 610
)
12
P
AGE
(Section 8 — continued from previous page)
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.
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.
(Section 8 — continued on next page)