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2.10.1 Fuel Pump Installation
IMPORTANT:
The following procedure requires the disconnection of fuel lines underneath the vehicle. Empty the vehicle of
fuel before attempting to disconnect the fuel lines. If the fuel tank is not emptied, fuel siphoning may occur,
resulting in a major fuel leak. Please,
NO SMOKING
when working in, on, or around fuel lines or systems.
1. Trial fit the fuel pump (24), fuel pump bracket (23), and sock (25) assembly to the driver’s side floor pan of the vehicle.
Make sure that the assembly is higher than the lowest part of the rear frame rail and below the rear axle brake line. Refer
to Figure 5 for suggested mounting location.
2. Remove the driver’s side rear seat bottom, pull the carpet out from under the side panel (arm rest/speaker cover panel). Lift
the carpet to gain access to the fuel pump mounting location.
3. Using the fuel pump/fuel pump bracket and isolator assembly as a template, mark and drill four 3/8” isolator mounting holes
in the floor pan.
4. Install the fuel pump assembly.
5. Replace the carpet and seat cushions.
6. Bleed off the residual fuel pressure at the fuel rail test port. Refer to Figure 6 for the location of the fuel rail test port.
WARNING: The fuel system in LT-1 powered vehicles is designed to retain a fuel pressure of approximately 30 psi
after the engine has been shut off. Be sure to bleed off fuel pressure before loosening the fuel lines.
7. Disconnect the plastic fuel line from the inlet of the fuel filter.
8. Remove the plastic retaining clip from the inlet of the fuel filter and install it on the fuel line hose barb (26).
9. Install the fuel line hose barb in the end of the plastic fuel line.
10. Connect the fuel line hose barb to the inlet side of the fuel pump using the 1/2” rubber fuel hose (27). Double clamp both
ends of the hose with large hose clamps (28).
11. Connect the outlet side of the fuel pump (the side with electrical connectors) to the inlet side of the fuel filter using the 3/8”
rubber fuel hose (29). Double clamp both ends with the small hose clamps (30).
NOTE:
Make sure that the fuel hose is pushed on far enough that the hose passes over the barb on the fuel filter inlet.
Lubricating the inside of the hose with transmission fluid will greatly ease this operation.
12. Use nylon tie-wraps to support the rubber fuel hose. Do not overtighten or crush the hose with tie-wraps. Ensure that the
hose is snuggly up against the existing fuel lines.
Figure 7 Fuel Pump Location
