Pontiac 2002 Firebird - Manual (Page 230)

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5. Then fill the coolant recovery tank to the FULL
COLD mark.
6. Put the cap back on the coolant recovery tank,
but leave the radiator pressure cap off.
7. Start the engine and let it run until you can feel the
upper radiator hose getting hot. Watch out for the
engine cooling fans.
8. By this time, the coolant level inside the radiator
filler neck may be lower. If the level is lower, add
more of the proper DEX
- COOL
R
coolant mixture
through the filler neck until the level reaches the
base of the filler neck.