
BigStuff3 Pro SEFI System (LS1)
Version 1.0 8
Harness
Label
Color/Connector
Label
Definition
Connect To Further Details
connector with an
orange seal
PWM Boost
Control
optional 4-way
connector to
solenoid or PWM
Packard connector
with a purple seal
Position
Sensor Input
stock LS1
camshaft position
sensor located on
the back of the
Packard connector
with a light blue
Cooling Fluid
Temperature
stock LS1 coolant
temp. sensor.
Packard connector
with a light blue
seal.
Air
Temperature
Input
temp. sensor
typically located
in the air intake
duct between the
air cleaner and
Packard connector
with a light blue
Control (IAC)
input
IAC motor assy.
located on or near
intake air around the
throttle blades at idle and
Packard connector
with a purple seal.
Position
Sensor
at the end of the
throttle shaft on
the throttle body
Senses the position of the
throttle blades [0%
(throttle closed) to 100%
(throttle wide open).
Packard connector
Absolute
Pressure
Sensor
stock MAP sensor
located on the
back of the
Packard connector
harness
connector
wire harness
Even & Odd
Light gray 7-way
Packard connectors
with an orange
seals
Even (2-4-6-
8) & Odd (1-
3-5-7)
cylinder bank
coils
connector on the
Even (2-4-6-8)
and Odd (1-3-5-7)
cylinder banks.
l_Connections
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