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How to Add Coolant to the Coolant
High Fill Reservoir
(5.7L LT5
(Code J)
Engine)
1. You can remove the coolant high fill
reservoir pressure cap when the
cooling system, including the coolant
high fill reservoir pressure cap and
upper radiator hose, is no longer hot.
Turn the pressure cap slowly to the
left until it first stops. (Don't press
down while turning the pressure cap.)
If you hear a hiss, wait for that to stop.
A hiss means there is still some
pressure left.
2. Then keep turning the pressure cap,
but now push down as you turn it.
Remove the pressure cap.
3.
Fill the coolant high fill reservoir with
the proper mix, up to the base of the
filler neck.
157
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