Vortech 1996-2000 5.7L Vortec Truck/SUV - Manual (Page 17)

P/N: 4GM020-010
©2000 Vortech Engineering, Inc.
All Rights Reserved, Intl. Copr. Secured
14AUG00 V 1.2 (Vortec 350-2 )4GM
11. SUPPLEMENTARY FUEL PUMP AND HARNESS
9
87
86 30
85
87A
(+) FUEL PUMP
SOLID GREY WIRE IN FUEL
PUMP HARNESS (RUNNING
ALONG THE DRIVER’S SIDE
FRAME MEMBER)
RELAY WIRING
SCHEMATIC
(+) BATTERY LUG
GROUND
A. Separate the factory 3/8” fuel rail supply line at the
compression fitting junction underneath the ve-
hicle just to the rear of the fuel filter.
B. Attach the supplied 1/2” hose to 3/8" compression
fitting to the line coming from the fuel tank.
Connect the supplied length of 1/2” fuel hose to
the 1/2” fitting previously installed and the re-
maining end to the supplied inline pump. Secure
with a #8 hose clamp.
C. Attach the discharge end of the fuel pump to the
line running into the fuel filter (use the supplied
5/16" hose to 3/8" compression fitting). Position
the pump in such a way that the inlet and dis-
charge hoses are not kinked or restricted and
maintain a gentle bend. The pump inlet is the most
critical as far as restriction is concerned and may
be trimmed if necessary to hold a smooth radius.
Make sure that all fuel pump hose connections are
secure.
D. Mount the fuel pump to the frame using the 1.5”
adel clamp. Position the clamp and drill a #16
hole. Secure using a #12 hex head screw.
E. Using the existing hole in the frame and supplied
#10 hardware, mount the relay to the vehicle
frame (see
Fig. 11-b and Fig. 10-b in section 10).
The relay mounting hole will also work well as a
grounding point for the pump and relay. Scrape
away the frame coating and paint to provide a
proper ground connection. Make sure that the
pump and relay grounding terminals are mounted
under the relay as opposed to on top so that a
metal-to-metal contact will be made.
Fig. 11-a
Fig. 11-b