Coolant for the 98 Deville is added into the coolant overflow bottle. The side of the bottle should have low and high coolant markings.
Check coolant level Perhaps thermostat is not opening to allow coolant to flow
How do I replace the heater core in my 98 cadillac deville
In the coolant resivoir.
Just bought my 98 Cadillac deville and has the luck on
yes will fit on a 98 deville it rob a litt it good
20L of 50/50 mixture DEXCOOL plus water mixture
Dex cool coolant.
How much antifreeze does a 1998 chevy mabilu ls take
In the coolant recovery tank
I have a 99 Deville and my car runs at about 190 to 200 degrees
By the thermostat
It would be on the coolant reservoir.