Belt is most likely loose and/or needs replacing
It will squeak
Belt worn out, or loose.
the belt its old or oil contamination on the belt or the belt its contaminated whit antifreeze
The belt will squeak until the coolant wears off.
change your belt
because it's slipping. tension or replace.
There are probaby many reasons but one that I know of is anti-freeze. If some anti-freeze gets on the belt it can cause a squeak and it's hard to get rid of it without replacing the belt.
How do you tighten the serpentine belt on an oldsmobile ciera
Possibly that the tensioner is bad or the belt glazed.
They use a serpentine belt.
A fan belt may squeak or slip badly in cold weather due to it being stiff from the weather. However, most likely you will need the belt replaced.
The Serpentine Belt needs to be tightend with the tensioner pulley (Idler Pulley)