Fuel Selector Valve - Hummer H1 Service Manual

3-30 Fuel, Emissions, and Exhaust

FUEL SELECTOR VALVE

The selector valve is used on models equipped with an auxil-
iary fuel tank (Figure 3-39). The valve is electrically operated
by a switch in the passenger compartment. The switch will be
mounted on the instrument panel.
Valve function is to switch fuel supply from main to auxiliary
tank (and back) when needed.
Quick connect fittings are used to attach each of the six fuel
lines to the valve. The plastic, two-piece style fittings are used.
The valve is mounted on a bracket attached to the passenger
side frame rail. Valve position is forward of the fuel tank and
B-pillar area.
The valve is not a serviceable part and must be replaced when
diagnosis indicates this is necessary.
VALVE-TO-PUMP
AND INJECTOR LINES
FUEL SELECTOR VALVE
VALVE
MOUNTING
BRACKET
RETURN LINE
(AUXILIARY TANK)
SUPPLY LINE
(AUXILIARY TANK)
S-CLIP
(TYPICAL)
Figure 3-39: Fuel Lines, Connections, and Attachment
___________________________________________
Selector Valve Replacement
The valve is accessible from under the vehicle. Disconnect the
battery and remove the valve-to-bracket bolts first. Then dis-
connect the fuel lines one at a time and tag them for reference.
Last, disconnect the valve-to-switch harness and remove the
valve. Reverse the process to install the valve.
TIE STRAP
FUEL LINE
BRACKET
CLAMP
(TYPICAL)
FUEL LINE
BRACKET
TANK-TO-VALVE
LINES
FUEL LINE
BRACKET
®